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16 results on '"Song, Xianni"'

10. Analysis of the mechanical properties of a reinforced thermoplastic composite pipe joint.

Author

Liu, Wenshu, Bai, Yong, Gao, Yifan, Song, Xianni, and Han, Zhiping

Subjects
FINITE element method, THERMOPLASTIC composites, STRESS concentration, PIPE, CORROSION resistance
Abstract

In recent years, reinforced thermoplastic composite pipe (RTP) is widely sought after because of its high strength and corrosion resistance. The development of a connector that is easy to install and highly reliable is essential for the successful application of RTP. In this paper, the mechanical properties of a butt-welding armoured joint between composite pipes were investigated by theoretical calculation method and finite element method. A plane strain model was established to study the mechanical response of the joint under internal pressure. In order to verify the theoretical results, a finite element model was established to analyse the stress distribution of the joint. Moreover, the finite element results are in good agreement with the theoretical results. The research of this paper provides a valuable reference for the engineering application of the joint in the pipeline system. [ABSTRACT FROM AUTHOR]

Published
2022
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13. Removal of catalyst particles from fluid catalytic cracking slurry oil by the simultaneous addition of a flocculants and a weighting agent

Author

Aijun Guo, Luhai Wang, Bin Lou, Dongming Zhang, Song Xianni, Zhiheng Li, and Dong Liu

Subjects
Flocculation, Aqueous solution, Chemistry, Sedimentation (water treatment), General Chemical Engineering, Polyacrylamide, 02 engineering and technology, General Chemistry, 021001 nanoscience & nanotechnology, Fluid catalytic cracking, Catalysis, chemistry.chemical_compound, 020401 chemical engineering, Chemical engineering, Scientific method, Slurry, 0204 chemical engineering, 0210 nano-technology
Abstract

In this study, catalyst particles (the main component is Al2O3–SiO2) were removed from the fluid catalytic cracking slurry oil by adding a polyacrylamide flocculants (1200 μg/g) and a ammonium citrate aqueous solution weighting agent (10% by weight of the slurry oil) at 95 °C, and then settled for 18 h. The ash content which determined by the muffle stove was considered as a criteria for measuring the efficiency of sedimentation. The size and distribution of the catalyst particles, before and after sedimentation, were analyzed using a laser particle size analyzer and a light transmission microscope. The results showed that the removal efficiency could reach 95.12% when both the flocculants and weighting agent were added. However, either the flocculants or weighting agent applied individually could only obtain inferior removal efficiencies of 87.04% or 68.76%, respectively. It would be attributed to the synergistic effect between the two agents. Moreover, it was also found that the flocs were rapidly formed from original catalyst particles and the flocculants firstly. Then the weighting agent provided assistance for the sedimentation of the flocs, of which the process was identified as the control step. The sedimentation process established in the experiment might play a role in the industrial removal of catalyst particles from slurry oil in the future.

Published
2018

16. Treatment of high chlorine-containing composting leachate biochemical effluent by Ti/RuO2-IrO2anodic electrochemical oxidation: Optimization and evolution of pollutants

Author

Song, Xianni, Chen, Xu, Zhang, Shuchi, and Wu, Donglei

Abstract

In this paper, the treatment of composting leachate biochemical effluent (CLBE) by electrochemical oxidation (EO) with Ti/RuO2-IrO2as the anode could achieve concomitantly organic carbon removal (COD) and nitrogen removal (NH3-N), taking advantage of CLBE inherent high chlorine content. Under the optimal conditions of the current density of 90 mA·cm−2, A/V= 14 m−1, d= 1 cm, pH= 8.34 and Cl-concentration of 6000 mg·L−1, 92.19% of NH3-N and 85.59% of TN could be removed in 40 min, and 100% COD removal could be achieved after 100 min, with energy consumption (EC) of 111.09 kW·h·m−3. And the increase in Cl-concentration could reduce the EC of the EO process. In parallel, constructed simple quantitative accounting models for chlorine-containing and nitrogen-containing species in the EO system and clarified the evolution of them. Cl species eventually exist mainly in the form of free chlorine (by-product AOCL concentration always below 2 mg·L−1), while N species were mainly removed in the form of N2(≈95.10% of TN). Additionally, the gas chromatography-mass spectrometry (GC-MS) showed that the dominant component of dissolved organic matter (DOM) in CLBE was degraded from the initial unsaturated C21-C30to the saturated C11-C20. And the Excitation emission matrix (EEM) showed that the EO achieved the non-selective degradation of DOM, the refractory humic acid DOM reached 90.74% removal and the readily biodegradable non-humic DOM removal 92.02%, respectively. These results indicated that the EO technology has broad application potential in the treatment of chlorinated wastewater, and coupling it after biological treatment would be a promising method.

Published
2023
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