Search

Your search keyword '"Xi, Bei-Dou"' showing total 323 results
Start Over Author "Xi, Bei-Dou"
323 results on '"Xi, Bei-Dou"'

9. Deciphering the Pivotal Reaction Conditions for Hydrogen Production from Tar Catalytic Cracking by Perovskite.

Author

Chen, Wang-Mi, Xi, Bei-Dou, Li, Ming-Xiao, Ye, Mei-Ying, Hou, Jia-Qi, Wei, Yu-Fang, Yu, Cheng-Ze, and Meng, Fan-Hua

Subjects
*CATALYTIC cracking, *HYDROGEN production, *TAR, *PEROVSKITE, *OXYGEN evolution reactions, *POLLUTANTS, *THERMAL stability
Abstract

The catalytic cracking of pyrolysis gasification tar into H2 has garnered significant attention due to its exceptional conversion efficiency. In this study, the effects of pollutant concentration, residence time, weight hourly space velocity (WHSV), and reaction temperature on the hydrogen performance of LaFe0.5Ni0.5O3 perovskite were comprehensively investigated. Results revealed that moderate pollutant concentration (0.3 g/L), low-medium residence time (250 SCCM), and low WHSV (0.24 gtoluene/(gcat·h)) facilitated efficient interaction between LaFe0.5Ni0.5O3 and toluene, thus achieving high hydrogen production. An increase in reaction temperature had minimal effect on the hourly hydrogen production above 700 °C but caused a significant increase in methane production. Additionally, the effects of oxygen evolution reactions, methane reactions, and methane catalytic cracking reactions of perovskite induced by different reaction conditions on tar cracking products were discussed in detail. Compared to previous reports, the biggest advantages of this system were that the hydrogen production per gram of tar was as high as 1.002 L/g, and the highest hydrogen content in gas-phase products reached 93.5%, which can maintain for approximately 6 h. Finally, LaFe0.5Ni0.5O3 showed good thermal stability, long-term stability, and catalyst reactivation potential. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

38. Review on Extracellular Respiratory Bacteria and Its Application in Migration and Transformation of Pollutants

Author

TANG Zhu-rui, HUANG Cai-hong, GAO Ru-tai, TAN Wen-bing, ZHANG Hui, LI Dan, and XI Bei-dou

Subjects
lcsh:GE1-350, extracellular respiratory bacteria, heavy metals, organic pollutants, lcsh:Agriculture (General), lcsh:S1-972, lcsh:Environmental sciences
Abstract

Extracellular respiratory bacteria(ERB) could produce electrons by oxidation of organic matter under anaerobic conditions, then transfer them to the extracellular electron acceptors and gain energy to maintain their growth. ERB play an important role in the migration and transformation of heavy metals and organic pollutants, and the synergy effect between different microorganisms exerts greater advantage than single microorganisms. These bacteria, mainly including Proteobacteria, Acidobacteria and Firmicutes, are widely distributed in the environment, and most of them are Gram-negative bacteria. Shewanella oneidensisi MR-1 and Geobacter sulfurreducens are often used as model microorganisms to reveal the mechanism of electron transport. Five mechanisms regarding extracellular electron transport have been identified, including direct electron transport, electron shuttling, electrokinesis, conductive nanowires, and intercellular electron transport. These mechanisms do not exist independently in environment, but simultaneously exert effects on contaminants degradation. The present review underlines the species, distribution and electron transfer mechanisms of ERB, with an emphasis on their recent applications on the migration and transformation of contaminants in environments. This review could provide theoretical foundation on how to better exert the environmental effects of ERB.

Published
2017

45. Spectroscopic characterization of DOM and the nitrogen removal mechanism during wastewater reclamation plant

Author

Wang, Lei, primary, Li, Ying-Jun, additional, Xiong, Ying, additional, Tan, Wen-Bing, additional, Zhang, Lie-Yu, additional, Li, Xiang, additional, Wang, Xiao-Shu, additional, Xu, Jian-feng, additional, Li, Tong-Tong, additional, Wang, Jin-Sheng, additional, Cai, Ming-Xuan, additional, Xi, Bei-Dou, additional, and Wang, Di-Hua, additional

Published
2017
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results