Kinetic modelling of methane decomposition in a tubular solar reactor

被引：88

作者：

Rodat, Sylvain ^{[1
]}

Abanades, Stephane ^{[1
]}

Coulie, Julien ^{[2
]}

Flamant, Gilles ^{[1
]}

机构：

[1] PROMES CNRS, UPR 8521, Mat & Solar Energy Lab, F-66120 Odeillo Font Romeu, France

[2] N GHY ZI Montplaisir, F-81000 Albi, France

来源：

CHEMICAL ENGINEERING JOURNAL | 2009年 / 146卷 / 01期

关键词：

Methane cracking; Kinetic model; Plug-flow reactor; Hydrogen production; Solar reactor; AEROSOL FLOW REACTOR; HYDROGEN-PRODUCTION; THERMAL-DECOMPOSITION; NATURAL-GAS; RAPID DECOMPOSITION; CHEMICAL REACTOR; PYROLYSIS; CARBON; DISSOCIATION; DECARBONIZATION;

D O I：

10.1016/j.cej.2008.09.008

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Solar methane cracking is a promising pathway to produce hydrogen and carbon black with the bonus of zero CO(2) emission. A kinetic simulation of the methane decomposition in a tubular solar chemical reactor prototype is presented. This reactor is composed of four independent tubular reaction zones inserted in a graphite cavity receiver. Chemical reaction modelling is carried out thanks to the Dsmoke software, using a detailed kinetic scheme for the wide range modelling of alkane transformation. First. a kinetic analysis of the chemical system is presented to determine the sequence of methane cracking and a sensitivity analysis of the results on temperature (in the range 1500-2300 K) and on natural gas composition is performed. Then, a kinetic simulation of the solar reactor is proposed and implemented, in which each tubular reaction zone is modelled by three plug-flow reactors in series representing the pre-heating, isothermal, and cooling zones of the reactor. It predicts the evolution of gas species concentrations as a function of residence time. Comparisons with experimental results between 1670 K and 1770 K show good agreement for CH(4) conversion, and CH(4) and H(2) off-gas compositions. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：120 / 127

页数：8

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