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Aromatic hydrocarbons production and synergistic effect of plastics and biomass via one-pot catalytic co-hydropyrolysis on HZSM-5
Journal of Analytical and Applied Pyrolysis ( IF 6 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.jaap.2020.104800
Wenjun Chen , Jifu Lu , Changsen Zhang , Yunyun Xie , Yuhang Wang , Jie Wang , Ruiqin Zhang

Abstract The catalytic co-hydropyrolysis of pine sawdust (PW) and high density polyethylene (HDPE) to selectively produce aromatic hydrocarbons was studied by optimizing reaction parameters (feedstock composition, reaction temperature, residue time, initial hydrogen pressure and catalyst to reactant ratio). The composition of feedstocks, reaction temperature and the ratio of catalyst to reactant all had significant effects on the content of aromatic hydrocarbons, and the appropriate reaction parameters were selected to maximize the yield of aromatic hydrocarbons. The maximum aromatic hydrocarbons yield (18.3 %) and the highest selectively (67.8 %) were obtained when the ratio of plastic to reactant was 0.6, 400 °C, 1.5 MPa for 1 h and the catalyst to reactant ratio was 0.2. Compared with hydropyrolysis of biomass, the addition of plastics reduced the yield of solid residue and the oxygen content in bio-oil. Characteristic analysis of bio-oil showed that that monocyclic aromatic hydrocarbons accounted for the majority of aromatic hydrocarbons in blends, with benzene, toluene, xylene (BTX) having the highest selectivity (51.6–70.6 %), and oxygenates were almost absent in bio-oil. Meanwhile, the possible reaction pathways in the co-hydropyrolysis of biomass and plastic for aromatic hydrocarbons were discussed extensively.

中文翻译:

HZSM-5一锅催化共加氢热解芳烃生产及塑料与生物质协同效应

摘要 通过优化反应参数(原料组成、反应温度、残留时间、初始氢气压力和催化剂与反应物的比例),研究了松木屑(PW)和高密度聚乙烯(HDPE)催化共氢热解选择性生产芳烃。原料组成、反应温度和催化剂与反应物的比例均对芳烃含量有显着影响,选择合适的反应参数可使芳烃收率最大化。当塑料与反应物的比例为0.6,400℃,1.5 MPa,1小时,催化剂与反应物的比例为0.2时,芳烃产率最高(18.3%)和选择性最高(67.8%)。与生物质的加氢热解相比,塑料的加入降低了固体残留物的产量和生物油中的氧含量。生物油的特征分析表明,单环芳烃占混合物中芳烃的大部分,苯、甲苯、二甲苯(BTX)的选择性最高(51.6-70.6%),生物油中几乎不存在含氧化合物。油。同时,广泛讨论了生物质与塑料共加氢热解芳烃的可能反应途径。
更新日期:2020-05-01
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