Catalytic co-pyrolysis of solid wastes (low-density polyethylene and lignocellulosic biomass) over microwave assisted biochar for bio-oil upgrading and hydrogen production

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL

ACS Catalysis Pub Date : 2022-11-10 DOI:10.1016/j.jclepro.2022.133971

Rongge Zou , Chenxi Wang , Moriko Qian , Erguang Huo , Xiao Kong , Yunpu Wang , Leilei Dai , Lu Wang , Xuesong Zhang , Wendy C. Mateo , Roger Ruan , Hanwu Lei

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引用次数: 22

Abstract

Metal catalysts are unavoidable within the process of catalytic pyrolysis, a part of hydrogen production; as a result, the reuse and disposal of these materials are problems that need to be solved. Biochar, with its extensive sources, large specific area, and developed pores, has the potential to be developed in this catalytic area. In this study, we used microwave-assisted corn stover biochar as a catalyst in the co-pyrolysis of Douglas Fir (DF) and low-density polyethylene (LDPE) in order to investigate its catalytic effects. The results showed that the biochar significantly increased the selectivity of hydrogen (H₂) in the syngas, and the highest selectivity that could be achieved was 72 vol% at 650 °C, with a biochar (BC)/feedstock ratio of 4. Furthermore, the application of biochar decreased the wax yield and contributed to the good selectivity of aromatics. The biochar developed in this study was also proven to show good reusability, as even after 10 times of reuses, the biochar still achieved a yield of H₂ over 50 vol%.

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固体废物(低密度聚乙烯和木质纤维素生物质)在微波辅助生物炭上的催化共热解用于生物油升级和制氢

金属催化剂是催化热解制氢过程中不可避免的一部分;因此，这些材料的再利用和处理是需要解决的问题。生物炭具有来源广泛、比表面积大、孔隙发达等特点，在该催化领域具有开发潜力。本研究以微波辅助玉米秸秆生物炭为催化剂，对花旗松(DF)和低密度聚乙烯(LDPE)共热解的催化效果进行了研究。结果表明，生物炭显著提高了合成气中氢气(H2)的选择性，在650℃条件下，生物炭(BC)/原料比为4时，可达到72 vol%的最高选择性。此外，生物炭的应用降低了蜡收率，对芳烃有较好的选择性。在本研究中开发的生物炭也被证明具有良好的可重复使用性，即使经过10次重复使用，生物炭的H2产量仍然超过50 vol%。

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.