Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India; Department of Chemical Engineering, Pandit Deendayal Petroleum University, Gandhinagar 382007, India.
Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India; National Centre for Combustion Research and Development, Indian Institute of Technology Madras, Chennai 600036, India.
Bioresour Technol. 2020 Apr;302:122775. doi: 10.1016/j.biortech.2020.122775. Epub 2020 Jan 10.
Rice straw and sugarcane bagasse were co-pyrolyzed with polypropylene and polystyrene using microwaves, and the pyrolysis vapors were catalytically upgraded using HZSM-5 catalyst. The product yields, composition and properties of bio-oil from pyrolysis of individual feedstocks and equal composition mixtures before and after catalytic upgradation were thoroughly investigated. The pyrolysis oil yields from polypropylene (82 wt%) and polystyrene (98 wt%) were high compared to that from rice straw (26 wt%) and bagasse (29 wt%). Catalytic upgradation at weight hourly space velocity of 11 h resulted in higher selectivity to unsaturated aliphatics and aromatic hydrocarbons. Properties of upgraded bio-oil from biomass-polypropylene mixtures were similar to that of light fuel oil with high calorific value (43 MJ/kg), low viscosity (1 cP), optimum density (0.850 g/cm) and flash point (70 °C). Oxygen content in catalytically upgraded co-pyrolysis bio-oil was low (<5%) as compared to upgraded pyrolysis bio-oil (14-18%), and pyrolysis bio-oil without upgradation (20-24%).
稻秸和甘蔗渣与聚丙烯和聚苯乙烯共热解，采用微波加热，并使用 HZSM-5 催化剂对热解蒸气进行催化升级。彻底研究了单独进料和催化升级前后等组成混合物热解的产物产率、组成和生物油性质。与稻秸（26wt%）和甘蔗渣（29wt%）相比，聚丙烯（82wt%）和聚苯乙烯（98wt%）的热解油产率较高。在重量时空速度为 11h 的条件下进行催化升级，导致不饱和脂肪族和芳烃的选择性更高。生物质-聚丙烯混合物的升级生物油的性质与高热值（43MJ/kg）、低粘度（1cP）、最佳密度（0.850g/cm）和闪点（70°C）的轻质燃料油相似。与升级后的热解生物油（14-18%）和未经升级的热解生物油（20-24%）相比，催化升级共热解生物油中的氧含量较低（<5%）。
