Towards enhanced catalytic reactivity in CO2-assisted gasification of polypropylene

FUEL

卷:284

Article

Wang, Zhiwei^1,2,3  Liu, Xuan^1,4  Burra, Kiran G.¹  Li, Jinhu^1,5  Zhang, Mengju^2,3  Lei, Tingzhou³  Gupta, Ashwani K.¹ 

[1] Univ Maryland, Dept Mech Engn, Combust Lab, College Pk, MD 20742 USA

[2] Energy Res Inst Co Ltd, Henan Acad Sci, Zhengzhou 450008, Peoples R China

[3] Henan Key Lab Biomass Energy, Zhengzhou 450008, Peoples R China

[4] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Sch Energy & Power Engn, Xian 710049, Peoples R China

[5] China Univ Min & Technol, Sch Safety Engn, Xuzhou 221116, Jiangsu, Peoples R China

关键词: CO2-assisted gasification;    Polypropylene (PP);    In-situ catalytic;    Quasi-in-situ catalytic;    Syngas evolution;   

DOI  :  10.1016/j.fuel.2020.119076

来源: Elsevier

【 摘 要 】

The role of catalyst (Ni/Al2O3) position on improved gasification of polypropylene (PP) in CO2 atmosphere using a fixed bed reactor at 900 degrees C was examined and the results compared with non-catalytic gasification. The catalytic gasification included in-situ and quasi-in-situ (with feedstock located close to but not directly in contact with the catalyst) configuration. Results are reported on the evolutionary behavior and yield of carbon monoxide (CO), hydrogen (H-2), hydrocarbons (CmHn) and total syngas. Compared to non-catalytic gasification, in-situ, and quasi-in-situ catalytic gasification produced higher H-2 by 120.5% and 137.1%, higher CO by 38.2% and 24.0%, higher CmHn by 57.1% and 98.2%, and higher total syngas by 44.1% and 43.8%, respectively. CO2-assisted gasification of PP with Ni/Al2O3 catalyst significantly enhanced the gases evolution rate and improved the syngas yield. Results revealed better catalytic activity with quasi-in-situ configuration in the thermal decomposition of PP into H-2 and CmHn than in-situ catalytic configuration. However, in-situ catalytic configuration provided more CO under similar gasification conditions. Approximately 0.8, 1.1 and 1.0 kg of CO2 could be consumed per kg of PP feedstock to generate syngas energy yield of 27.5, 43.1 and 48.1 MJ with non-catalytic, in-situ and quasi-in-situ catalytic configuration, respectively, suggesting efficient utilization of both CO2 and PP waste for clean and efficient energy production.

【 授权许可】

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