Department of Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK 74078, United States.
Department of Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, OK 74078, United States.
Bioresour Technol. 2019 Aug;285:121299. doi: 10.1016/j.biortech.2019.03.138. Epub 2019 Apr 9.
Fast pyrolysis is a promising route to transform biomass into bio-oil for further refining into transportation fuels and chemicals. However, bio-oil applications suffer from several challenges due to its adverse properties. This study reports improving bio-oil properties through co-pyrolysis of biomass with methane over molybdenum/zinc (MoZn/ZHSM-5) and HZSM-5 catalysts that promote deoxygenation, decarbonylation, hydrogen transfer and aromatization reactions. The co-pyrolysis was conducted at 650 °C and 750 °C in a micro-scale reactor and a bench-scale reactor. The highest bio-oil yield, energy content, and energy yield of 53.4%, 10.2 MJ/kg, and 29.9%, respectively, were obtained with methane over MoZn/HZSM-5 at 650 °C. Acids, alcohols, aldehydes, benzene derivatives, BTEXs, furans, ketones, PAHs, and phenols were detected in bio-oils while phenols dominated under most conditions. Oxygenated compounds decreased using MoZn/HZSM-5 with methane at 750 °C. The results demonstrate that methane used with catalysts can reduce oxygenated compounds and improve properties and yield of bio-oil.
快速热解是将生物质转化为生物油，进一步精制为运输燃料和化学品的有前途的途径。然而，由于生物油的不良性质，其应用受到了一些挑战。本研究通过在钼/锌（MoZn/ZHSM-5）和 HZSM-5 催化剂上与甲烷共热解生物质来改善生物油的性质，这些催化剂促进脱氧、脱羰基、氢转移和芳构化反应。共热解在微型反应器和台式反应器中于 650°C 和 750°C 下进行。在 650°C 时，甲烷在 MoZn/HZSM-5 上的生物油产率、能量含量和能量收率最高，分别为 53.4%、10.2MJ/kg 和 29.9%。生物油中检测到酸、醇、醛、苯衍生物、BTEXs、呋喃、酮、多环芳烃和酚类，而在大多数条件下，酚类占主导地位。在 750°C 下使用甲烷和 MoZn/HZSM-5 可以减少含氧化合物。结果表明，使用催化剂与甲烷共热解可以减少含氧化合物并改善生物油的性质和产率。
