文献类型：期刊文献

英文题名：Gasification under CO2-Steam Mixture: Kinetic Model Study Based on Shared Active Sites

作者：Liu, Xia[1];Wei, Juntao[1];Huo, Wei[1];Yu, Guangsuo[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：10

期号：11

外文期刊名：ENERGIES

收录：;EI(收录号：20174904509546);WOS:【SCI-EXPANDED(收录号:WOS:000417046500209)】；

基金：This work has been supported by the National Natural Science Foundation of China (21376081; 21676091).

语种：英文

外文关键词：gasification; kinetic model; active site; chemisorption

摘要：In this work, char gasification of two coals (i.e., Shenfu bituminous coal and Zunyi anthracite) and a petroleum coke under a steam and CO2 mixture (steam/CO2 partial pressures, 0.025-0.075 MPa; total pressures, 0.100 MPa) and CO2/steam chemisorption of char samples were conducted in a Thermogravimetric Analyzer (TGA). Two conventional kinetic models exhibited difficulties in exactly fitting the experimental data of char-steam-CO2 gasification. Hence, a modified model based on Langmuir-Hinshelwood model and assuming that char-CO2 and char-steam reactions partially shared active sites was proposed and had indicated high accuracy for estimating the interactions in char-steam-CO2 reaction. Moreover, it was found that two new model parameters (respectively characterized as the amount ratio of shared active sites to total active sites in char-CO2 and char-steam reactions) in the modified model hardly varied with gasification conditions, and the results of chemisorption indicate that these two new model parameters mainly depended on the carbon active sites in char samples.