Continuous monitoring of char surface activity toward benzene

作     者：Cheolyong Choi Kentaro Shima Shinji Kudo Koyo Norinaga Xiangpeng Gao Jun-ichiro Hayashi 

作者机构：Interdisciplinary Graduate School of Engineering SciencesKyushu University6-1Kasuga KoenKasuga 816-8580Japan Institute for Materials and Engineering ChemistryKyushu University6-1Kasuga KoenKasuga 816-8580Japan Department of Materials Science and EngineeringSchool of EngineeringNagoya UniversityNagoya 464-8601Japan Discipline of Electrical EngineeringEnergy and PhysicsSchool of Engineering and Information TechnologyMurdoch University90 South StreetMurdochWA 6150Australia Transdisciplinary Research and Education Center of Green TechnologyKyushu University6-1Kasuga KoenKasuga 816-8580Japan 

出 版 物：《Carbon Resources Conversion》 (碳资源转化（英文）)

年 卷 期：2019年第2卷第1期

页      面：43-50页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0821[工学-纺织科学与工程] 081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0703[理学-化学] 0702[理学-物理学] 

基　　金：A part of this work was financially supported by New Energy and Industrial Technology Development Organization Japan for an R/D project on next-generation coal gasification system.Another part was supported by the Japan Society for the Promotion of Science(JSPS)for Grant-in-Aid for Scientific Research(Grant 17H01340) 

主　　题：Carbon deposition Aromatics Tar Char Kinetics Pyrolysis Gasification 

摘      要：Kinetics of thermal decomposition of benzene on lignite-derived char was investigated at 900℃ by applying a new method to continuously monitor the char surface *** vapor was continuously forced to pass through a micro fixed bed of char with residence time as short as 7.6 ms,and then detected continuously by a flame-ionization *** showed the presence of two different types of char surfaces;consumptive Type I surface and non-consumptive(sustainable)Type II *** I surface of a partially CO_(2)-gasified char had an capacity of carbon deposit from benzene over 20 wt%-char and an initial activity(represented by a first-order rate constant)as high as 160 s−*** of them decreased with increasing carbon deposit due to consumption of micropores accessible to benzene,and finally became zero leaving Type II surface that had a very stable activity with rate constant of 4 s−*** chars without gasification had capacities of Type I surfaces smaller by two orders of magnitude than the partially gasified char,while the Type II surfaces had activities similar to that of the partially gasified *** was found that Type II surface converted benzene into not only carbon deposit but also diaromatics and even greater *** of the greater aromatics was unknown because they were deposited onto the reactor wall immediately after passing through the char bed.