Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave, St. Paul, MN 55108, United States.
Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave, St. Paul, MN 55108, United States; Key Laboratory of Resource Clean Conversion in Ethnic Regions of Education Department of Yunnan, Joint Research Centre for International Cross-border Ethnic Regions Biomass Clean Utilization in Yunnan, Yunnan Minzu University, Kunming 650500, PR China.
Bioresour Technol. 2018 Nov;268:1-8. doi: 10.1016/j.biortech.2018.07.108. Epub 2018 Jul 21.
The excessive oxygen content in biomass obstructs the production of high-quality bio-oils. In this work, we developed a tandem catalytic bed (TCB) of CeO and HZSM-5 in an analytical pyrolyzer to enhance the hydrocarbon production from co-pyrolysis of corn stover (CS) and LDPE. Results indicated that CeO could remove oxygen from acids, aldehydes and methoxy phenols, producing a maximum yield of hydrocarbons of 85% and highest selectivity of monocyclic aromatics of 73% in the TCB. The addition of LDPE exhibited a near-complete elimination of oxygenates, leaving hydrocarbons as the overwhelming products. With increasing LDPE proportion, the yield of aliphatics and the selectivity of BTX kept increasing. An optimum H/C of 0.7 was superior to that reported in literature. Mechanisms consisting of deoxygenation, Diels-Alder reactions, hydrocarbon pool and hydrogen transfer reactions were discussed extensively. Our findings provide an efficient method to produce high-quality biofuels from renewable biomass resources.
生物质中过多的氧气含量会阻碍高质量生物油的生产。在这项工作中，我们在分析热解器中开发了 CeO 和 HZSM-5 的串联催化床（TCB），以提高玉米秸秆（CS）和 LDPE 共热解过程中烃类的产量。结果表明，CeO 可以从酸、醛和甲氧基苯酚中去除氧，在 TCB 中产生最大烃类收率为 85%，单环芳烃的最高选择性为 73%。LDPE 的添加几乎完全消除了含氧化合物，使烃类成为压倒性产物。随着 LDPE 比例的增加，脂肪族产物的产率和 BTX 的选择性不断增加。最佳的 H/C 为 0.7，优于文献报道的值。广泛讨论了脱氧、Diels-Alder 反应、烃池和氢转移反应等机制。我们的研究结果为从可再生生物质资源中生产高质量生物燃料提供了一种有效方法。
