首页 | 本学科首页   官方微博 | 高级检索  
     


Role of oxygen surface groups in catalysis of hydrogasification of carbon black by potassium carbonate
Authors:Hossein Zoheidi  Dennis J. Miller
Affiliation:1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Academician Semenov Av., 1, Chernogolovka, Moscow Region 142432, Russia;2. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow 119991, Russia;3. Lomonosov Moscow State University, Department of Chemistry, Moscow 119991, Russia;1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;2. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China;1. Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China;2. State Key Laboratory of High-efficiency Utilization and Green Chemical Enginneering, Ningxia University, Yinchuan 750021, Ningxia, China;1. The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Department of Chemistry, Shanghai Normal University, Shanghai 200234, China;2. Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;3. Arrhenius Laboratory, Department of Physical, Inorganic and Structural Chemistry, Stockholm University, Stockholm 10691, Sweden
Abstract:The reaction rates of a nonporous graphitic carbon lampblack with hydrogen gas at 865°C and 500 psi were measured following treatments such as degassing and/or oxidation with and without impregnation of K2CO3. The results lead to the conclusion that oxygen surface groups enhance the reactivity of the carbon by generating “nascent” active sites on decomposition into CO and CO2. In the catalyzed case the basic and C=O carbonyl groups form active and stable surface complexes. The acidic groups, on the other hand, could not be well characterized and may form stable and inactive or unstable and active complexes depending on their nature.
Keywords:Carbon black   catalysis   potassium carbonate   hydrogen   gasification   surface complexes
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号