title: Combined pretreatment with torrefaction and washing using torrefaction liquid products to yield upgraded biomass and pyrolysis products.
abstract: This study presented an approach to upgrade biomass and pyrolysis products using a process based on torrefaction liquid washing combined with torrefaction pretreatment. The torrefaction of cotton stalk was first conducted at 250°C for 30min and then the resulting torrefaction liquid products were collected and reused to wash cottonstalk. The pyrolysis of the original and pretreated cotton stalk was performed at 500°C for 15min in a fixed-bed reactor. The results indicated that the combined pretreatment obviously reduced the metallic species in cotton stalk, decreased the water and acids contents while promoted phenols in bio-oil, declined the ash content in biochar, as well as improved the heating value of non-condensable gas. Overall, the combined pretreatment did not only allow to reuse the liquid products issued from torrefaction pretreatment but also improved the quality of biomass and the pyrolysis products, making it a novel promising pretreatment method.
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Dengyu
authors.initials: D
authors.lastname: Chen
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Jiaming
authors.initials: J
authors.lastname: Mei
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Haiping
authors.initials: H
authors.lastname: Li
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Yiming
authors.initials: Y
authors.lastname: Li
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Mengting
authors.initials: M
authors.lastname: Lu
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Ma
authors.affiliation: School of Engineering, National Engineering & Technology Research Center of Wood-Based Resources Comprehensive Utilization, Zhejiang Agriculture & Forestry University, Lin'an, Zhejiang 311300, China. Electronic address: mazqzafu@163.com.
authors.forename: Zhongqing
authors.initials: Z
authors.lastname: Ma
mesh_terms: D056804:Biofuels / Q000032:analysis; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002606:Charcoal / Q000737:chemistry*; D003368:Gossypium / Q000737:chemistry; D006361:Heating; D010938:Plant Oils; D018520:Plant Shoots / Q000737:chemistry; D014867:Water
chemical_list: D056804:Biofuels; D010938:Plant Oils; C540010:biochar; D014867:Water; D002606:Charcoal
keywords: Bio-oil; Cotton stalk; Pyrolysis; Torrefaction; Washing