燃料化学学报2017，Vol.45Issue(7)：789-797,9.
钾和一氧化碳对松木屑快速热解半焦特性的影响
Effects of potassium and CO atmosphere on properties of biomass chars from flash pyrolysis
摘要
Abstract
Raw biomass and its de-potassium sample washed by water were pyrolyzed in a fixed bed reactor under pure N2 and CO-rich atmosphere at different temperatures. The obtained biomass chars were characterized by Fourier transform infrared spectroscopy ( FT-IR) , surface area analyzer, inductively coupled plasma emission spectroscopy and polarizing microscope. The yields of char, functional groups and other physicochemical structure were also studied and their evolution behaviors were examined. The results show that below 750℃, the BET surface areas and the amounts of alkyl and aliphatic functional groups in the chars derived from raw biomass are higher than those of de-potassium ones, but the char yields and the amounts of aromatic functional groups in the chars of raw biomass are lower than that of de-potassium samples. As to the effect of CO atmosphere, the yields of char and the amounts of all functional group in the chars derived from CO-rich atmosphere are less than that of N2 atmosphere, But the surface areas is higher than that of N2 atmosphere. Above 750℃, both potassium and CO can help to increase the char yields but decrease the amount of functional group and BET surface areas. In addition, the minerals are highly scattered and theirs amount on the surface of chars ( raw biomass char, N2 atmosphere) is less when the pyrolysis temperature is lower than 750℃; while above 750℃, those are higher and the clusters of fusion mineral components increases with increasing pyrolysis temperature. As for the graphitization degree of biomass chars, it increases with increasing pyrolysis temperature but poor graphitization was obtained when the pyrolysis temperature is lower than 750℃. Moreover, CO can help to increase while K decreases the graphitization degree above 750℃.关键词
生物质半焦/钾/热解气氛Key words
biomass char/potassium/pyrolysis atmosphere分类
能源科技引用本文复制引用
段会文,张永奇,王志青,李位位,黄戒介,赵建涛,房倚天..钾和一氧化碳对松木屑快速热解半焦特性的影响[J].燃料化学学报,2017,45(7):789-797,9.基金项目
The project was supported by the National Natural Science Foundation of China ( 21676289 ) , the Research Supported by the CAS/SAFEA International Partnership Program for Creative Research Teams and Youth Innovation Promotion Association (2014156).国家自然科学基金(21676289),中国科学院国家外国专家局创新团队国际合作伙伴计划和中国科学院青年创新促进会(2014156)资助 （ 21676289 ）
