Deactivation Kinetics Model of H2S Removal over Mesoporous LaFeO3/MCM-41 Sorbent during Hot Coal Gas Desulfurization

Autor:	Bingsi Liu, Zhen Zhang, Yong Son Hong, X. H. Zhao, Z. P. Cai
Rok vydání:	2014
Předmět:	Materials science Sorbent Chromatography Partial differential equation General Chemical Engineering Energy Engineering and Power Technology Thermodynamics Kinetic energy Flue-gas desulfurization Nonlinear system Fuel Technology Reaction rate constant Coal gas Mesoporous material
Zdroj:	Energy & Fuels. 28:6012-6018
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef5008825
Popis:	The improved deactivation kinetic model over mesoporous LaFeO3/MCM-41 sorbents for hot coal gas desulfurization was established with mass-transfer correlation based on elementary stoichiometric equation, which consisted of both the spatial and the time partial differential equations. MATLAB software was used to solve partial differential equations by means of forward finite differential method and to estimate kinetic parameters via nonlinear least-squares fitting. The rate constants ka and kd were obtained via aforementioned kinetic model over different LaFeO3/MCM-41 sorbents. The calculated results were in accordance with experimental data under various operating conditions. The kinetic model can be used successfully to predict the distributions of H2S concentration at different times and spatial positions within fixed-bed layers, compared to unreacted shrinking core model, random pore model, or grain model. It is of very great significance to obtain basical chemical engineering data for the design of ne...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f902740782296d64c0b9f000518e6dfc https://doi.org/10.1021/ef5008825 Zobrazit plný text záznamu