| 引用本文： |
-
崔凯,黄中艺,李立硕.硝酸铁催化热解桉木制备半焦及其反应性研究[J].广西科学,2018,25(6):721-727. [点击复制]
- CUI Kai,HUANG Zhongyi,LI Lishuo.Study on Preparation of Eucalyptus Biochar by Catalytic Pyrolysis with Fe(NO3)3 and Its Reactivity[J].Guangxi Sciences,2018,25(6):721-727. [点击复制]
|
|
| 摘要: |
| [目的] 生物质热解可生成生物半焦及生物油，生物半焦可进一步气化生成高附加值的含氢的合成气，但生物半焦的反应性对气化反应有着重要的影响，研究Fe（NO3）3在热解过程中对桉木半焦反应性的影响对制备高反应性生物半焦有重要意义。[方法] 通过浸渍法将桉木负载不同浓度的Fe（NO3）3溶液中，考察Fe3+催化对热解半焦燃烧反应性的影响。[结果] Fe（NO3）3催化可明显提高桉木热解半焦的反应性，随着Fe（NO3）3浓度由0.17 mol·L-1增加到0.35 mol·L-1，半焦的反应性由0.03 min-1增加到0.06 min-1，其Laman散射峰强度增大，半焦结构的d002间距由催化前的0.341 nm增至0.382 nm。热解温度由600℃升到800℃时，半焦的反应性下降。[结论] 采用硝酸铁催化热解桉木粉可制备出高反应性桉木半焦，450℃下测定的半焦与O2的燃烧反应活性增大，随着热解温度升高，桉木半焦的反应性下降。 |
| 关键词: 桉木 热解 半焦 微晶结构 反应性 |
| DOI：10.13656/j.cnki.gxkx.20181225.001 |
| 投稿时间：2018-08-29 |
| 基金项目:广西自然科学基金项目（2014GXNSFAA118058）和广西石化资源加工及过程强化技术重点实验室主任课题基金项目资助。 |
|
| Study on Preparation of Eucalyptus Biochar by Catalytic Pyrolysis with Fe(NO3)3 and Its Reactivity |
|
CUI Kai1, HUANG Zhongyi1, LI Lishuo1,2
|
| (1.School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004, China;2.Guangxi Key Laboratory of Petrochemical Resources Processing and Process Intensification Technology, Nanning, Guangxi, 530004, China) |
| Abstract: |
| [Objective] Biomass pyrolysis can produce biochar and bio-oil, and biochar can be further gasified to produce high valued syngas with hydrogen, but the reactivity of the biochar has an important influence on the gasification reaction. The effect of Fe(NO3)3 on the reactivity of eucalyptus char during pyrolysis is important for the preparation of highly reactive biochar.[Methods] In this research, the effect of Fe3+ catalysis on the combustion reactivity of pyrolysis biochar was investigated by impregnation that eucalyptus were immersed in different concentration of Fe(NO3)3 solution.[Results] The results showed that Fe(NO3)3 catalysis could significantly improve the reactivity of eucalyptus pyrolysis biochar.As the concentration of Fe(NO3)3 increased from 0.17 mol·L-1 to 0.35 mol·L-1,the reactivity increased from 0.03 min-1 to 0.06 min-1.The intensity of Laman scattering peak also increased and the d002 spacing of the biochar structure increased from 0.341 nm to 0.382 nm before the catalysis. While the pyrolysis temperature increased from 600℃ to 800℃, the reactivity of biochar decreased.[Conclusion] Eucalyptus biochar with high reactivity can be prepared by catalytic pyrolysis of eucalyptus powder with Fe(NO3)3,the combustion reactivity between biochar and O2 has greatly enhanced under 450℃. As the pyrolysis temperature increases, the reactivity of the eucalyptus biochar decreases. |
| Key words: eucalyptus pyrolysis biochar microcrystalline structure reactivity |
