A Study on the Applicability of Kinetic Models for Shenfu Coal Char Gasification with CO 2 at Elevated Temperatures

Youqing Wu, Shiyong Wu and Jinsheng Gao
Additional contact information
Youqing Wu: Department of Chemical Engineering for Energy Resources, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
Shiyong Wu: Department of Chemical Engineering for Energy Resources, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China
Jinsheng Gao: Department of Chemical Engineering for Energy Resources, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China

Energies, 2009, vol. 2, issue 3, 1-11

Abstract: In this paper, measurements of the CO 2 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 CO 2 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 CO 2 in the whole experimental temperature range; (ii) at the relatively low temperatures, the modified volumetric model was as good as the random pore model to simulate the CO 2 gasification reaction of Shenfu coal chars, while at the elevated temperatures, the modified volumetric model was superior to the random pore model for this process; (iii) the integral expression of the modified volumetric model was more favorable than the differential expression of that for fitting the experimental data. Moreover, by simply introducing a function: A = A ? exp(ft), it was found that the extensive model of the modified volumetric model could make much better predictions than the modified volumetric model. It was recommended as a convenient empirical model for comprehensive simulation of Shenfu coal char gasification with under conditions close to those of entrained flow gasification.

Keywords: Shenfu coal chars; CO2 gasification; kinetic model; elevated temperatures (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2009
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/2/3/545/pdf (application/pdf)
https://www.mdpi.com/1996-1073/2/3/545/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:2:y:2009:i:3:p:545-555:d:5386

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().