Henan Province Engineering Research Center for Biomass Value-Added Products, Henan Agricultural University, Zhengzhou, Henan 450002, China; Pyrolysis Technology Research Group, Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.
Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia.
J Hazard Mater. 2022 Feb 5;423(Pt A):127096. doi: 10.1016/j.jhazmat.2021.127096. Epub 2021 Sep 4.
Microwave co-pyrolysis was examined as an approach for simultaneous reduction and treatment of environmentally hazardous hospital plastic waste (HPW), lignocellulosic (palm kernel shell, PKS) and triglycerides (waste vegetable oil, WVO) biowaste as co-feedstock. The co-pyrolysis demonstrated faster heating rate (16-43 °C/min) compared to microwave pyrolysis of single feedstock (9-17 °C/min). Microwave co-pyrolysis of HPW/WVO performed at 1:1 ratio produced a higher yield (80.5 wt%) of hydrocarbon liquid fuel compared to HPW/PKS (78.2 wt%). The liquid oil possessed a low nitrogen content (< 4 wt%) and free of sulfur that could reduce the release of hazardous pollutants during its use as fuel in combustion. In particular, the liquid oil obtained from co-pyrolysis of HPW/WVO has low oxygenated compounds (< 16%) leading to reduction in generation of potentially hazardous sludge or problematic acidic tar during oil storage. Insignificant amount of benzene derivatives (< 1%) was also found in the liquid oil, indicating the desirable feature of this pyrolysis approach to suppress the formation of toxic polycyclic aromatic hydrocarbons (PAHs). Microwave co-pyrolysis of HPW/WVO improved the yield and properties of liquid oil for potential use as a cleaner fuel, whereas the liquid oil from co-pyrolysis of HPW/PKS is applicable in the synthesis of phenolic resin.
微波共热解被视为一种同时还原和处理环境危害性医院塑料废物（HPW）、木质纤维素（棕榈仁壳，PKS）和甘油三酯（废植物油，WVO）生物废物的方法，作为共进料。与单一进料的微波热解（9-17°C/min）相比，共热解表现出更快的加热速率（16-43°C/min）。在 1:1 比例下进行的 HPW/WVO 微波共热解产生了更高产率（80.5wt%）的烃类液体燃料，高于 HPW/PKS（78.2wt%）。液体油氮含量低（<4wt%），不含硫，可减少其作为燃料在燃烧过程中释放有害污染物。特别是，从 HPW/WVO 共热解获得的液体油具有低含氧化合物（<16%），可减少在油储存期间产生潜在危险的污泥或有问题的酸性焦油。液体油中还发现苯衍生物的含量很少（<1%），表明这种热解方法具有抑制有毒多环芳烃（PAHs）形成的理想特征。HPW/WVO 的微波共热解提高了液体油的产率和性质，可作为潜在的清洁燃料，而 HPW/PKS 的共热解液体油可用于合成酚醛树脂。
