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Catalytic hydrodeoxygenation of bio-oil obtained from microwave co-pyrolysis of food waste and low-density polyethylene
Process Safety and Environmental Protection ( IF 7.8 ) Pub Date : 2022-07-28 , DOI: 10.1016/j.psep.2022.07.056
Shukla Neha , Neelancherry Remya , S.F. Mendes Pedro , Joris W. Thybaut , Wenes Ramos da Silva , Alberto Wisniewski

Food waste can be a useful carbon resource when chemically recycled. While co-pyrolysis of realistic food waste (FW) has been studied, its complex upgrading is yet to be investigated. The catalytic hydrodeoxygenation (HDO) was employed for studying the pyrolysis oil generated from microwave co-pyrolysis of FW and low-density polyethylene (LDPE). More particularly, the effects of reaction temperature and time on stream were assessed in a continuous flow reactor. The combination of 48 h on stream at 200 ⁰C exhibited optimal performance in terms of nitro-oxygenated compounds reduction (N1–2, O1N1, O1N2 and O2N1 classes) and large oxygenated compounds classes (O7-O9) conversion into smaller ones (O1-O4). Stability analysis of pyrolysis oil showed that HDO significantly improved the properties of HDO oil (density, pH, TAN and HHV) and stabilized its properties for longer storability (60 days), i.e., after HDO at 48 h/200 ⁰C the oil quality had improved in terms of lower density (18 %), moisture content (88 %) and TAN (74 %) along with a higher pH and HHV (28 % and 51 %, respectively). This brings the HDO oil quality close to generic bio-oil and bio-diesel standard requirements.



中文翻译:

餐厨垃圾与低密度聚乙烯微波共热解生物油催化加氢脱氧

当化学回收时,食物垃圾可以成为有用的碳资源。虽然已经研究了实际食物垃圾 (FW) 的共热解,但其复杂的升级还有待研究。采用催化加氢脱氧(HDO)研究了FW和低密度聚乙烯(LDPE)微波共热解产生的裂解油。更具体地,在连续流动反应器中评估反应温度和时间对流动的影响。在 200 ⁰C 下运行 48 小时的组合在减少硝基氧化化合物(N 1–2、O 1 N 1、O 1 N 2和 O 2 N 1 )方面表现出最佳性能类)和大的含氧化合物类(O 7 -O 9)转化为较小的(O 1 -O 4)。裂解油的稳定性分析表明,HDO 显着改善了 HDO 油的性能(密度、pH、TAN 和 HHV),并使其性能稳定,可延长储存时间(60 天),即 HDO 后在 48 h/200 ⁰C在较低的密度 (18%)、水分含量 (88%) 和 TAN (74%) 以及较高的 pH 值和 HHV (分别为 28% 和 51%) 方面有所改善。这使 HDO 油质接近通用生物油和生物柴油标准要求。

更新日期:2022-07-28
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