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Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-03-25 , DOI: 10.1002/er.5370
Yunwu Zheng 1 , Jida Wang 1 , Can Liu 1 , Yi Lu 1 , Xu Lin 1 , Wenbin Li 1 , Zhifeng Zheng 2
Affiliation  

The present work aims to investigate the thermal behavior, kinetics, thermodynamics, and product distribution during copyrolysis of transition metal salt (Ni, Co, Zn, Cu, and Fe)‐added biomass and model compounds with low density polyethylene(LDPE) over a Ni‐based HZSM‐5 catalyst by TGA and fixed bed reactor. The interactions and reaction mechanisms during copyrolysis were evaluated. The influence of Ni‐impregnated biomass (C‐M) and Ni‐modified HZSM‐5 (Ni/HZ) on the formation of pyrolysis bio‐oil from biomass and model compounds and its subsequent effect on catalytic pyrolysis vapor upgrading was discussed. The results indicated that the presence of transition metal decreased the thermal degradation temperature and thermodynamics parameters; maximum decomposition rate, and reaction complexity. Ni/HZ catalyst could further decrease the activation energy, accelerate the reaction rate and change reaction process, and the modified samples/LDPE under copyrolysis with HZSM‐5 catalyst presented a more significant effect than Ni/HZ catalyst. Subsequently, the Ea of pine, cellulose and lignin changed from 24.11, 18.29, and 28.68 kJ/mol (CP@Ni/HZ) to 56.04, 69.84, and 16.21 kJ/mol (CP‐Ni@HZSM‐5), respectively. In addition, Ni could inhibit the depolymerization of cellulose and promoted the formation of char, coke, and lignin derived phenolics. And Ni‐impregnated biomass reduced the formation of desired aromatic hydrocarbons, but result in increasing of the char and non‐condensable gases. But Ni/HZ catalysts promote the conversion of biomass to target products.

中文翻译:

镍基HZSM-5催化剂对金属浸渍的生物质和塑料的催化共分解:协同效应,动力学和产物分布

本工作旨在研究在过渡金属盐(镍,钴,锌,铜和铁)添加的生物质和低密度聚乙烯(LDPE)模型化合物的仿制过程中,热行为,动力学,热力学和产物分布。 TGA和固定床反应器的镍基HZSM-5催化剂。评价了水解过程中的相互作用和反应机理。讨论了镍浸渍的生物质(CM)和镍改性的HZSM-5(Ni / HZ)对由生物质和模型化合物形成热解生物油的影响及其对催化热解蒸气提质的后续影响。结果表明,过渡金属的存在降低了热降解温度和热力学参数。最大分解速率和反应复杂性。Ni / HZ催化剂可进一步降低活化能,加快反应速率,改变反应过程,HZSM-5催化剂在共溶条件下改性的样品/ LDPE比Ni / HZ催化剂具有更大的作用。随后,松树,纤维素和木质素的Ea分别从24.11、18.29和28.68 kJ / mol(CP @ Ni / HZ)变为56.04、69.84和16.21 kJ / mol(CP‐Ni @ HZSM-5)。此外,Ni可以抑制纤维素的解聚并促进炭,焦炭和木质素衍生酚的形成。浸有镍的生物质减少了所需的芳香烃的形成,但导致了焦炭和不凝性气体的增加。但是Ni / HZ催化剂促进了生物质向目标产品的转化。HZSM-5催化剂在共水解条件下的改性样品/ LDPE的效果要比Ni / HZ催化剂显着。随后,松树,纤维素和木质素的Ea分别从24.11、18.29和28.68 kJ / mol(CP @ Ni / HZ)变为56.04、69.84和16.21 kJ / mol(CP‐Ni @ HZSM-5)。此外,Ni可以抑制纤维素的解聚并促进炭,焦炭和木质素衍生酚的形成。浸渍了镍的生物质减少了所需的芳香烃的形成,但导致了焦炭和不凝性气体的增加。但是Ni / HZ催化剂促进了生物质向目标产品的转化。HZSM-5催化剂在共水解条件下的改性样品/ LDPE的效果要比Ni / HZ催化剂显着。随后,松树,纤维素和木质素的Ea分别从24.11、18.29和28.68 kJ / mol(CP @ Ni / HZ)变为56.04、69.84和16.21 kJ / mol(CP‐Ni @ HZSM-5)。此外,Ni可以抑制纤维素的解聚并促进炭,焦炭和木质素衍生酚的形成。浸有镍的生物质减少了所需的芳香烃的形成,但导致了焦炭和不凝性气体的增加。但是Ni / HZ催化剂促进了生物质向目标产品的转化。68 kJ / mol(CP @ Ni / HZ)分别为56.04、69.84和16.21 kJ / mol(CP‐Ni @ HZSM-5)。此外,Ni可以抑制纤维素的解聚并促进炭,焦炭和木质素衍生酚的形成。浸渍了镍的生物质减少了所需的芳香烃的形成,但导致了焦炭和不凝性气体的增加。但是Ni / HZ催化剂促进了生物质向目标产品的转化。68 kJ / mol(CP @ Ni / HZ)分别为56.04、69.84和16.21 kJ / mol(CP‐Ni @ HZSM-5)。此外,Ni可以抑制纤维素的解聚并促进炭,焦炭和木质素衍生酚的形成。浸渍了镍的生物质减少了所需的芳香烃的形成,但导致了焦炭和不凝性气体的增加。但是Ni / HZ催化剂促进了生物质向目标产品的转化。
更新日期:2020-03-25
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