title: An approach for upgrading biomass and pyrolysis product quality using a combination of aqueous phase bio-oil washing and torrefaction pretreatment.
abstract: Bio-oil undergoes phase separation because of poor stability. Practical application of aqueous phase bio-oil is challenging. In this study, a novel approach that combines aqueous phase bio-oil washing and torrefaction pretreatment was used to upgrade the biomass and pyrolysis product quality. The effects of individual and combined pretreatments on cotton stalk pyrolysis were studied using TG-FTIR and a fixed bed reactor. The results showed that the aqueous phase bio-oil washing pretreatment removed metals and resolved the two pyrolysis peaks in the DTG curve. Importantly, it increased the bio-oil yield and improved the pyrolysis product quality. For example, the water and acid content of bio-oil decreased significantly along with an increase in phenol formation, and the heating value of non-condensable gases improved, and these were more pronounced when combined with torrefaction pretreatment. Therefore, the combined pretreatment is a promising method, which would contribute to the development of polygeneration pyrolysis technology.
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Dengyu
authors.initials: D
authors.lastname: Chen
authors.affiliation: Nanfang College, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Kehui
authors.initials: K
authors.lastname: Cen
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Xichun
authors.initials: X
authors.lastname: Jing
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Jinghui
authors.initials: J
authors.lastname: Gao
authors.affiliation: College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Li
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: D018533:Biomass; D005740:Gases; D006361:Heating; D006358:Hot Temperature; D014867:Water
chemical_list: D005740:Gases; D014867:Water
keywords: Aqueous phase bio-oil; Cotton stalk; Pyrolysis; TG-FTIR; Torrefaction