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research-article

Characteristic analysis of a rotary regenerative type catalytic combustion reactor for ultra low calorific value gas

[+] Author and Article Information
Zhenkun Sang

Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, 800 Dong Chuan RD, Minhang District, Shanghai, 200240, China
goosang@sjtu.edu.cn

Zemin Bo

Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, 800 Dong Chuan RD, Minhang District, Shanghai, 200240, China
rightbo123@sjtu.edu.cn

Xing Liu

Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, 800 Dong Chuan RD, Minhang District, Shanghai, 200240, China
liuxing1992@sjtu.edu.cn

Yiwu Weng

Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, 800 Dong Chuan RD, Minhang District, Shanghai, 200240, China
ywweng@sjtu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4037481 History: Received July 25, 2016; Revised July 26, 2017

Abstract

In order to eliminate pollution from ultra low calorific value gas (ULCVG) of methane and realize energy recovery simultaneously, a novel reactor with the function of regenerator and catalytic combustion named rotary regenerator type catalytic combustion reactor is studied. The reactor walls which store and reject heat alternatively can preheat the ULCVG temperature to the ignition temperature of methane, then catalytic combustion occurs rapidly. Periodical rotation of the reactor can maintain the stability of catalytic combustion. According to the feature of the reactor such as rotator and catalytic combustion, considering the coupled heat exchange boundary condition, the characteristic of this reactor was calculated and analyzed with the help of computational fluid dynamics (CFD). The results show that the ULCVG can be oxidized as a primary fuel, with the methane conversation rate above 91%, and the feasibility of this reactor is proved in theory. The reactor can continuously generate high temperature gas(1035 K-1200 K) which can be used by the heat consumption unit (HCU) such as turbine, boiler and SOFC service etc. In state I (or II) the outlet gas and flue temperature was increased by approximately linear law. This rule is useful to evaluate the performance of this reactor. Periodical rotation not only supports high temperature zone which is useful to catalytic combustion, but also avoids catalyst high temperature deactivation.

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