农业机械学报2017，Vol.48Issue(3)：332-337,6.DOI:10.6041/j.issn.1000-1298.2017.03.042
结合态与无机态钠对木质素半焦气化特性的影响
Influence of Inorganic and Organic Bound Na on Char Gasification Characteristics of Lignin
摘要
Abstract
The sodium salts in black liquor exists in two main forms:as phenolic sodium (-CONa) and carboxylate sodium (-COONa) groups (PCSG) forming a part of alkali lignin or as dissolved salt (NaOH and Na2CO3).The purpose of this study is to investigate the effect of inorganic and organic bound sodium on the char characteristics of alkali lignin,char samples were prepared by a high-temperature furnace as pyrolysis temperature at 400℃,600℃ and 800℃,respectively.The char morphology,elemental distribution,gasification reactivity and catalytic mechanism were studied by scanning electron microscopy/energy spectrum analyzer (SEM/EDS),thermal gravimetric analysis (TG) and thermogravimetric analyzer coupled with Fourier transform infrared spectrometry (TGA-FTIR).The results suggested that for organic bound sodium lignin,a large number of bubbling occurred at the char surface and the sodium content of char surface was increased from 5.36％ to 15.72％ as the pyrolysis temperature was increased from 400℃ to 800℃.Meanwhile,the carbon conversions of CO2 and steam gasification were increased by 30％ and 20％,respectively.The effect of organic bound sodium on the reaction characteristic was varied with temperature.When the reaction temperature was lower than 600℃,the reaction mainly occurred between-CO2Na and char.As the temperature was in the range of 600～ 800℃,both-CO2Na and-CONa can react with char.As the temperature was higher than 800℃,the reaction mainly occurred between-CONa and char.关键词
碱木质素/半焦/气化/结合态钠/无机态钠Key words
alkali lignin/char/gasification/organic bound Na/inorganic Na分类
能源科技引用本文复制引用
郭大亮,王林芳,郭惠萍,陈梦薇,薛国新,武书彬..结合态与无机态钠对木质素半焦气化特性的影响[J].农业机械学报,2017,48(3):332-337,6.基金项目
国家自然科学基金项目(31500492)、浙江省自然科学基金项目(LY16C160005)、浙江理工大学科研启动基金项目(14012079-Y)、化学工程与技术浙江省高校重中之重学科优秀青年人才培养基金项目(ZYG2015012)、纺织科学与工程浙江省高校重中之重学科优秀青年人才培养基金项目(2013YBZX06、ZYG2015012) （31500492）
