文献类型：会议论文

英文题名：Study on kinetics of char gasification with CO2 and steam by the method of shared active sites

作者：Huo, Wei[1]; Zhou, Zhijie[1]; Wang, Yifei[1]; Dai, Zhenghua[1]; Gong, Yan[1]; Yu, Guangsuo[1]

机构：[1] Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai, 200237, China

会议日期：October 6, 2014 - October 9, 2014

会议地点：Pittsburgh, PA, United states

语种：英文

外文关键词：Petroleum coke - Steam - Chemisorption - Gasification

摘要：Two coals and a petroleum coke were gasified with a mixture of steam and CO2 using a TGA. The partial pressures of steam and CO2 varied from 0.025 to 0.075MPa. CO2/steam chemisorptions of chars were also carried out using the TGA to measure chemisorption quantities. In order to estimate the interactions by char-steam-CO2 reaction, two conventional models were used to fit the experimental data. However, the models can't describe the interactions by char-steam-CO2 reaction exactly. In this study, a new model based on the Langmuir-Hinshelwood model was proposed. The proposed model assumes that char-CO2 and char-steam reactions share active sites partially. The results show that the proposed model can evaluate the interactions by char-steam-CO2 reaction accurately. Moreover, two new parameters in the proposed model do not vary with gasification conditions. They are found to depend on the carbon active sites of the char by the results from chemisorption tests.