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Single-atom catalysts (SACs) have attracted much attention due to their unique structure and properties, especially in terms of maximizing the utilization of atoms and improving the intrinsic catalytic activity. In recent years, SAC-based advanced oxidation processes (AOPs) have become a new field in the environmental field, and have been widely used in the removal of various refractory organic pollutants. In this paper, the synthesis and characterization methods of SACs are analyzed, and the catalytic performance of SACs in different Fenton-like catalytic reactions is emphasized. In addition, tests of the continuous flow of SACs fixed on membrane or columnar filters are presented to explore the potential of SACs for practical applications in Fenton-like reactions. Finally, we prospect the future rational SACs design and the exploration direction of the Fenton-like reaction mechanism, aiming to improve the application potential of Fenton-like reaction in practical wastewater. [ABSTRACT FROM AUTHOR]

Copyright of Chemical Engineering of Oil & Gas / Shi You Yu Tian Ran Qi Hua Gong is the property of PetroChina Southwest Oil & Gas Field Company 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 Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu 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.)

In view of the existing problems of many treatment processes and large mud production in the cryogenic distillation station of Yuanba Gas Field, it is planned to introduce electrochemical oxidation method for mining. The effluent is pretreated to remove ammonia nitrogen and reduce organic content. Optimized the current intensity and electrolysis time in the electrochemical oxidation reaction through a small test between. The results show that after the hardness of the produced water is removed, when the electrolysis current is 1200A and the reaction time is 30min, the ammonia nitrogen removal rate can reach 100%, while effectively reducing the organic content of wastewater. At this time, the cost of water treatment per ton is 7.56 yuan. Combined with the actual situation of the cryogenic distillation station, pilot test The process of "clarification and softening + electrolysis of ammonia nitrogen + reverse osmosis + MVR evaporation" is adopted to shorten the treatment process and effectively reduce the disposal of chemicals and sludge Cost, providing theoretical and process design support for the subsequent new resource recycling station. [ABSTRACT FROM AUTHOR]

Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu 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 natural gas in Yuanba gas field contains high H2S and CO2. With the increase of water output and the increase of mineralization, the corrosion environment of surface system becomes more and more complex. In order to find out the main control factors that can affect the ground system corrosion of Yuanba gas field, this article establishes a grey correlation analysis method which takes CO2 partial pressure, H2S partial pressure, liquid-gas ratio, pH value, salinity, Cl- concentration, and corrosion inhibitor residual concentration as independent variables, and corrosion rate as dependent variable. The influence degree of various factors on corrosion is analyzed by data. The results show that the main control factors of the ground system corrosion in Yuanba gas field are CO2 partial pressure, H2S partial pressure and liquid-gas ratio. Therefore, it is possible to appropriately optimize the corrosion inhibitor addition program, adjust the batch operation cycle, and reasonably reduce the cost of corrosion inhibitor pigging operation. The research results provide a technical basis for the integrity management of the ground system in Yuanba gas field [ABSTRACT FROM AUTHOR]

The mother liquor as the residual liquid was produced after the coarse salt crystallized in the three-effect evaporation system in wastewater treatment plant of Yuanba gas field, which is a high salinity wastewater containing complex components, At present, the treatment of mother liquor is facing great difficulties with the lack of mature processing technology, This study intends to carry out advanced treatment of mother liquor_ After the process comparison and optimization, the mother liquor was treated by coagulation sedimentation, sulfate removal of calcium chloride, and organic compounds removal of UV+ H2 O2 co-oxidation, The effluent quality indexes were achieved by SS< 50 mg/ L, sulfate radical of 4 200 mg/ Land TOC of 459, 25 mg/ L, which can meet the requirements of influent water quality for the produced water treatment process in Yuanba gas field, Therefore, the plight of mother liquor build-up and advanced treatment would be significantly improved, The processing techniques in this study have the advantages of simple technological process and easy maintainability, To some extent, the near zero discharge of mother liquor could be achieved. [ABSTRACT FROM AUTHOR]