A study of the heat transfer characteristics of novel Ni‐foam structured catalysts

Canadian Journal of Chemical Engineering - Tập 94 Số 11 - Trang 2225-2234 - 2016
Zheng Wan1, Jian Jiang1, Hongfang Ma1, Yakun Li2, Yong Lu2, Fahai Cao3,1
1School of Chemical Engineering East China University of Science & Technology Shanghai 200237 China
2Shanghai Key Laboratory of Green Chemistry & Chemical Processes, School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 China
3Key Laboratory of Coal Gasification & Energy Chemical Engineering, Ministry of Education East China University of Science & Technology Shanghai 200237 China

Tóm tắt

Highly exothermic reactions require catalyst beds with good heat transfer characteristics. Novel Ni‐foam structured catalysts have significant heat transfer efficiency compared with traditional packed beds, which is very suitable for the highly exothermic methanation reaction. The present work reports an experimental study of steady‐state heat transfer behaviour of a gas flowing through a fixed bed packed with Ni‐foam structured catalyst under various operation conditions. Experiments were carried out in a dedicated tubular reactor with inlet air temperature ranging from 160 to 200 °C, heating pipe temperature inside the fixed bed ranging from 400 to 500 °C, and air flow rate ranging from 4.0 to 6.0 Nm3/h. Effective radial conductivity (λer) and wall heat transfer coefficient (αw) were derived based on the steady‐state measurements and the two‐dimensional pseudo‐homogeneous heat transfer model. The estimated values of λer and αw were between 2.17 and 3.34 W/m · K and 170 to 250 W/m2 · K respectively. Heat transfer properties of Ni‐foam structured catalyst are prominent compared with conventional packed bed. From the results it was found that the metal matrix and porous structure of the catalyst enhanced heat transfer. We anticipate that our research will open a new opportunity for design of new‐generation SNG process.

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Thông tin
Thông tin xuất bản

Canadian Journal of Chemical Engineering

Tập 94 Số 11

2225-2234

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