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Using Pt (NH3)4Cl2 and Pd (NO3)2 ·2H2O as precursor salts of Pt and Pd， and cordierite (Crd) ceramic honeycomb material as carrier， Pd-Pt/cordierite type catalysts for methane combustion performance， Pd-Pt/Crd-1[n (Pd): n (Pt)=1: 2] and Pd-Pt/Crd-2[n (Pd): n (Pt)=2: 1]， were prepared by impregnation method. The measurement results show that both catalysts can be uniformly dispersed on the surface of the carrier， and Pt/Pd exist in the same form. Wherein the interstitial space between particles doped with n (Pd): n (Pt)=2: 1 type catalyst is greater than n (Pd): n (Pt)=1: 2， and the catalytic sites of metal Pd/Pt loaded on its surface are more than n (Pd): n (Pt)=1: 2. Moreover， catalyst doped with n (Pd): n (Pt)=2: 1 exhibits richer acidic sites on the surface， showing superior thermal stability. The experimental results on catalytic activity of methane combustion reaction show that both catalysts can achieve almost 100% complete methane conversion efficiency at 450 ℃ . Impressively， the n (Pd): n (Pt)=2: 1 catalyst can achieve a methane conversion efficiency of 68. 43% at a combustion temperature of 410 ℃， which is 1. 14 times higher than the n (Pd): n (Pt)=1: 2 catalyst (60. 08%). Therefore， the catalyst demonstrates optimal catalytic performance in the lowtemperature region when the doping molar ratio of metals Pd to Pt is 2: 1. [ABSTRACT FROM AUTHOR]

Copyright of Precious Metals / Guijinshu is the property of Precious Metals Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Corrosion & Protection in Petrochemical Industry is the property of Corrosion & Protection in Petrochemical Industry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Tar catalytic reforming is the key to the utilization of biomass resources, and under the long・ term reforming, the catalyst will lose its activity due to various reasons・ Four types of catalytic systems of natural ores, biochar, nickel-based and composite catalysts are analyzed, and a catalyst performance and efficiency enhancement strategy is proposed on the basis of the catalytic inactivation mechanism・ Studies have shown that nickel groups are essential elements for catalysts to play an effective role; catalyst carbon deposition, sintering and poisoning inactivation are closely related to the reaction temperature, and are also affected by factors such as catalyst loading, interaction ability between active components and poison coverage ・ Ey introducing metal-based supports and additives, and optimizing the catalyst into a core-shell structure, it is an important efficiency strategy to reduce the inactivation rate of the catalyst and improve the tar conversion rate・ In future research, neural networks, density functional theory and other technologies can be used to clarify the reaction path of tar reforming and optimize the preparation method of catalysts, so as to provide theoretical basis and practical value for improving catalytic performance. [ABSTRACT FROM AUTHOR]

The emergence of low temperature plasma technology provides a new idea for reforming methane and carbon dioxide・ This paper describes the basic principle of low temperature plasma co-catalyzing CH4-CO2 reforming and generating synthesis gas (CO and H2) of high valuechemicals, explores the reaction mechanism of low temperature plasma co-catalyzing CH4-CO2 reforming, and analyzes the action mechanism of low temperature plasma in the collaborative catalytic CH4-CO2 reforming reaction・ The effects of the active components, support and additives on the reforming reaction of CH4-CO2 were discussed, and the influencing factors and existing problems in the process of low temperature plasma co-cat ・ alyzed reforming reaction were reviewed. [ABSTRACT FROM AUTHOR]

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Hydrometallurgy of China is the property of Hydrometallurgy of China Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sn-Doped amorphous (2o-Sn-B catalysts were pre parcel by liquid phase co-rcdurtion method. The catalytic activity of (2o-Sn-B in hydrogen production from NaBH4 hydrolysis was studied systematical・ ly. X・ray diffraction(XRD), scanning electron microscopy (SEM) and X-ray photoclcctron spectroscopy (XPS) were used to analyze the c fleet of Sn doping on the micros! met lire, surface morphologies and lcncc state of (]o-Sn-B catalyst. Th<* results show that the (2o-Sn-B catalyst maintains a good amorphous stnicturc when the molar ratio of Sn doping is lower than 5.0%, and the introduction of Sn can significantly improve the dispersion of the catalyst and effectively inhibit the agglomrration of particles・ NaBlh Hydrolysis experiment shows that Sn doping ratio couki significantly a fleet the catalytic activity of the cat・ alyst in NaBH4 hydrolysis. When the Sn doping ratio is 1.0%, (2o-Sn-B catalyst shows the best catalytic activity・ More important is that the catalytic stability of (2o-Sn-B is much higher than that of CoB catalyst without the doping of Sn. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Dalian University of Technology / Dalian Ligong Daxue Xuebao is the property of Journal of Dalian University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Journal of Petrochemical Universities / Shiyou Huagong Gaodeng Xuexiao Xuebao is the property of Journal Editorial Department Of Liaoning Shihua University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Guangxi Normal University - Natural Science Edition is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective In the sulfuric acid alkylation unit, the main causes and solutions to the deactivation of the hydrogenation catalyst were found by analyzing the running status of the selective hydrogenation reactor of 1,3-butadiene. Methods By analyzing the feedstock properties before and after catalyst deactivation, the effect of feedstock properties changes on the 1,3-butadiene removal rate was investigated. Results For the selective hydrogenation of the 1,3-butadiene catalyst, a high level of pH, caustic sodium and total sulfur contents in feedstock will inhibit the active centers of the catalyst. Conclusion The harmful impurities in feedstock were removed by optimizing operation. Additionally, the deactivated catalysts were re-activated by on-line treatment with pure hydrogen, the catalyst activity was significantly restored and maintained long-cycle running after re-starting up. [ABSTRACT FROM AUTHOR]

MoS2-supported ceramic filler catalyst is prepared by dispersion-impregnation-sintering process. The phase structure, microstructure and element distribution of the catalyst are characterized and analyzed by XRD, SEM and EDS. The results showed that MoS2 is uniformly loaded on the surface of iron mud-based ceramic filler, and the rough surface structure of the catalyst would expose more active sites in the reaction. With CODcr removal rate as the evaluation index, the effects of pH, m (CODcr): m(H2O2), catalyst dosage and reaction time on heterogeneous Fenton treatment of papermaking wastewater by MoS2 supported ceramsite filler catalyst are investigated. The results showed that under the optimal conditions of pH 2.5, catalyst dosage 30 g/L,m(CODcr): m(H2O2)=1:1.5, reaction time 120 min, the CODcr removal rate of papermaking wastewater was 72.52%. The free radical quenching experiment showed that in the heterogeneous Fenton oxidation system, The active substances that degrade organic pollutants are mainly · OH,¹O2, ·O2-. [ABSTRACT FROM AUTHOR]

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Engineering Science Research & Application is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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SO2 released during sludge combustion causes significant environmental pollution. Sulfur can be fixed in the ash by adding a calcium-based sulfur-fixing agent, but the effect is limited because of its easy sintering at high temperatures. Herein, Ce-Mn/ZrO2 composite catalysts were prepared by coprecipitation method to improve the sulfur-fixing effect, and the composition and morphology of the catalysts were characterized by field emission scanning electron microscopic-energy dispersive spectroscopy (FESEM-EDS), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Further, by mixing the catalyst with a calcium-based sulfur-fixing agent and sludge, high-temperature sulfur-fixing experiments were carried out on a sulfur determination device to study its sulfur-fixing performance. The results showed that the synthesis method of the catalyst could effectively disperse Ce and Mn elements in the carrier. The synergistic effect between Ce-Mn could promote a reaction to produce more oxygen vacancies, thereby promoting the conversion of SO2 to SO3. The sulfur fixation rate was as high as 72. 60% when n (Ca)/n (S)=1. 5, the content of Ce-Mn/ZrO2 catalyst was 3. 5% and the combustion temperature was 1000 ℃. The results of the thermogravimetric analysis showed that the temperatures of sludge ignition were depressed as well as reaction activation energy, and the combustibility of sludge could be promoted after the agents were added. So that the sulfur fixation product could be stable. Ce-Mn/ZrO2 presents an excellent catalytic activity for sulfur fixation, so it has a broad prospect in enhancing sulfur removal in sludge combustion. [ABSTRACT FROM AUTHOR]

Objective The aim is to test the feasibility of using a DPC catalyst to directly conduct catalytic cracking of inferior vacuum residue in industrial units and to explore the impact of blending a certain proportion of inferior vacuum residue on product structure, mainly low-carbon olefin production. Methods The industrial test was carried out by using a 1.2 Mt/a catalytic cracking unit. The study investigated changes in process operations and product structure through adjustments in DPC catalyst inventory proportion and raw material slag blending ratios. Results The industrial practice of using a DPC catalyst to produce olefins from vacuum residue directly showed that when the DPC catalyst inventory proportion reached 26.5%. The blending proportion of vacuum residue in the feed was increased to 15.25%, and the ethylene volume fraction in the catalytic dry gas reached 16.57%, an increase of 2.46 percentage points compared to the blank calibration value. The yields of propylene and triene(ethylene, propylene and 1,3-butadiene) in liquefied gas reached 7.35% and 8.38%, respectively, which increased by 0.67 percentage points and 0.83 percentage points compared with the blank calibration value, monthly efficiency increase could reach 19.639 2 million yuan. Conclusions The DPC catalyst is capable of facilitating the directly catalytic cracking of inferior vacuum residue, offering a streamlined processing flow and significant economic benefits. It can provide new ideas for enterprises to reduce costs, increase efficiency, save energy and reduce carbon. [ABSTRACT FROM AUTHOR]

The effect of y-Al2O3 θ-Al2O3, A1C13/A12O3, AC, SiO2 and other catalysts on the dechlorination of tetrachloropropane to triehloropropylene was investigated. The results showed that y-Al2O3 catalyst had high dechlorination performance, and the conversion rate increased with the increase of temperature from 150 ~240 䨟. Above 240 ℃, the conversion rate begins to decrease w让h the increase of temperature. The main product is triehloropropylene, and the selectivity reaches more than 99%. At the same time, the regeneration performance of A12O3 catalyst was studied, and the characteristics of XRD, TG, BET, FTIR, NH3-TPD, EDS and XPS were analyzed. The results show that the y-Al2O3 catalyst has a rapid deactivation phenomenon, and the main reasons for the deactivation are reaction coking, carbon deposition and surface adsorption of chloride ions. After the reaction, the catalyst was calcination under suitable conditions in the air atmosphere, and its performance was basically restored to the level of fresh catalyst. The average conversion rate of tetrachloropropane was greater than 90%, and the selectivity of trichloropropylene was greater than 99%. [ABSTRACT FROM AUTHOR]

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Copyright of Low-Carbon Chemistry & Chemical Engineering is the property of Low-Carbon Chemistry & Chemical Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Low-Carbon Chemistry & Chemical Engineering is the property of Low-Carbon Chemistry & Chemical Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Low-Carbon Chemistry & Chemical Engineering is the property of Low-Carbon Chemistry & Chemical Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The research progress of carbon capture, utilization, and storage(CCUS) technology, especially referring to the application research of magnesiumfunctional materials such as MgO and Mg/Al hydrotalc让e in C02 capture and carbon resource conversion was reviewed・ Magnesium-based materials have diverse applications due to their unique physical, chemical properties and structures. This review introduces the modification works of researchers on magnesium・based materials and summarizes the future development trend of CCUS technology and magnesium・base(l functional materials. [ABSTRACT FROM AUTHOR]

The composition of lignocellulose and liquefaction mechanism were introduced, and the research status, effects and defects of different catalysts for solvent thermal liquefaction were also reviewed ・ Due to the complex structure and high crystallinity of lignocellulose, it is not conducive to liquefaction, and the pretreatment of lignocellulose was proposed, including physical pretreatment, biological pretreatment and chemical pretreatment. [ABSTRACT FROM AUTHOR]

C/C composites have a wide range of applications in aerospace materials due to their low density, high temperature resistance and other characteristics. Improving the microwave absorbing performance of these materials through modification methods is expected to broaden their application fields. In this paper, C/C composite, SiC nanowire (SiCnw), and SiCnw modified C/C composite were fabricated by precursor infiltration and pyrolysis method, and chemical vapor reaction method using phenolic resin, Si, SiO2 and catalyst ferrocene as raw materials. The microstructures and properties of C/C and SiCnw / C/C composites were studied, and the influence of SiCnw content to electromagnetic wave absorption performance of C/C composites was discussed. The results show that SiCnw with core/shell structure is successfully introduced into C/C composite, and the SiCnw / C/C composite exhibits excellent electromagnetic wave absorption performance with the increasing of SiCnw content, and the minimum reflection loss of SiCnw / C/C composite with 15. 4% (mass fraction) SiCnw is - 38. 02 dB with a thickness of 2. 07 mm, significantly lower than those of other materials. This work provides a technical and theoretical basis for the preparation of high-performance carbon/ceramic composites. [ABSTRACT FROM AUTHOR]

Copyright of Chemical Engineering (China) / Huaxue Gongcheng is the property of Hualu Engineering Science & Technology Co Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Biomass Chemical Engineering is the property of Editorial Office of Biomass Chemical Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Petrochemical Universities / Shiyou Huagong Gaodeng Xuexiao Xuebao is the property of Journal Editorial Department Of Liaoning Shihua University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article introduces a catalyst, (N, N-dimethyl-octadecylamine, DMSA), into the blend of poly(lactic acid)(PLA) and ethylene-butyl acrylate-glycidyl methacrylate graft copolymer (EBA-GMA), to improve the impact toughness of the PLA/EBA-GMA (70/30) blend system through the promotion of in-situ reaction between PLA and EBA-GMA. The influence of DMSA content on the mechanical properties of the blend system was investigated. The results show that the impact strength of the PLA/EBA-GMA (70/30) blend without DMSA is only 10. 9 kJ/m² . When the content of DMSA is 0. 5%, the impact strength of the PLA/ EBA-GMA (70/30) blend reaches as high as 63. 1 kJ/m² . Structural and morphological characterizations indicate that the addition of a small amount of DMSA effectively promotes the reactivity between epoxy groups on EBA-GMA and terminal groups of PLA, thereby enhancing the impact toughness of the PLA/EBA-GMA blend. [ABSTRACT FROM AUTHOR]

Objective In order to avoid the problem of equipment blockage caused by sulfur deposition in the conventional natural gas wet oxidation desulfurization process, an iron-based hollow glass beads(HGB) catalyst modified by amino-phosphate difunctional group was developed for the heterogeneous catalytic oxidation regeneration of desulfurization rich liquid in the desulfurization- regeneration step-by-step scheme. Methods Infrared spectroscopy was used to characterize the structure of the catalyst. The effects of the ratio of silane coupling agent (KH-550), roasting temperature and FeCl2, 6H2. O dosage on the regeneration of desulfurization agent and desulfurization effect were investigated by static desulfurization experiments, and the reusability performance of the catalyst was explored. Results The amino-phosphoric acid modified iron-based HGB catalyst could make the desulfurization rich liquid to be effectively regenerated and remain stable in the acidic desulfurization liquid. Under the conditions of roasting temperature of 300 C for 6 h, mass ratio of HGB to KH-550 of 18 and mass ratio of HGB to FeCl2, 6H2O of 15, the iron-based HGB catalyst prepared had the best catalytic performance, and the desulfurization performance kept basically stable after 3 times of repeated regeneration of desulfurization solution. Infrared spectroscopy analysis showed that the catalyst structure remained intact. Conclusions The amino-phosphoric acid modified iron-based HGB catalyst has a good effect on desulfurization rich liquid regeneration in the field of natural gas wet oxidation desulfurization, which provides a new choice for desulfurization rich liquid regeneration at present. [ABSTRACT FROM AUTHOR]

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Copyright of Energy Chemical Industry is the property of Energy Chemical Industry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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