a study on the applicability of kinetic models for shenfu coal char gasification with co2 at elevated temperatures研究动力学模型的适用性shenfu煤炭与二氧化碳气化温度升高.pdfVIP

Energies 2009, 2, 545-555; doi:10.3390/e OPEN ACCESS energies ISSN 1996-1073 /journal/energies Article A Study on the Applicability of Kinetic Models for Shenfu Coal Char Gasification with CO2 at Elevated Temperatures Youqing Wu 1,2, Shiyong Wu 1,2,* and Jinsheng Gao 1,2 1 Department of Chemical Engineering for Energy Resources, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China; E-Mails: wyq@ (Y.W.); gjs@ (J.G.) 2 Key Laboratory of Coal Gasification of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China * Author to whom correspondence should be addressed; E-Mail: wsy@; Tel.: +86-21- 6425-3236; Fax: +86-21-6425-2058 Received: 5 June 2009; in revised form: 29 June 2009 / Accepted: 10 July 2009 / Published: 20 July 2009 Abstract: In this paper, measurements of the CO2 gasification kinetics for two types of Shenfu coal chars, which were respectively prepared by slow and rapid pyrolysis at temperatures of 950 °C and 1,400 °C, were performed by an isothermal thermo-gravimetric analysis under ambient pressure and elevated temperature conditions. Simultaneously, the applicability of the kinetic model for the CO2 gasification reaction of Shenfu coal chars was discussed. The results showed: (i) the shrinking un-reacted core model was not appropriate to describe the gasification reaction process of Shenfu coal chars with CO2 in the who