Catalytic performances of HZSM-5, NaY and MCM-41 in two-stage catalytic pyrolysis of pinewood

2016 International Conference on New Energy and Future Energy System

Wang, Y.M.^1 ; Wang, J.^1

Department of Chemical Engineering for Energy, East China University of Science and Technology, 130# Meilong Road, Shanghai

200237, China^1

关键词: Catalytic effects;    Catalytic performance;    Catalytic pyrolysis;    Fixed bed reactor;    Formation of olefins;    Heavy aromatics;    Liquid products;    Single catalyst;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/40/1/012015/pdf
DOI  :  10.1088/1755-1315/40/1/012015

来源: IOP

【 摘 要 】

Experiments were carried out in an atmospheric two-stage fixed bed reactor to investigate the catalytic cracking of pinewood pyrolysis vapour over three single catalysts, HZSM-5, NaY and MCM-41. The pinewood was pyrolyzed in the first stage reactor at a heating rate of 10 °C min-1from room temperature to 700 °C, and the resultant vapour was cracked through the second reactor at a temperature of 500, 600 or 700 °C with and without catalyst. Both the gases and liquid compounds were thoroughly determined. It was found that all three catalysts had significant catalytic effects on the vapour cracking especially in the range of 500-600 °C. However, three catalysts showed dissimilarity to each other with respect to the distributions of products. Among three catalysts, HZSM-5 displayed the highest selectivity for the formation of olefins and light aromatics, with the least deposit of coke, though NaY showed the strongest capability of deoxygenation. The HZSM-5 cracking at 600 °C was preferred to balance the yield and quality of bio-products. MCM-41 behaved as a worse catalyst in the deoxygenation, and its resultant liquid product contained more heavy aromatics.