多种木质素热解耦合催化重整反应特性及其产物研究

杨光; 张文杰; 沈德魁

doi:10.19912/j.0254-0096.tynxb.2022-0376

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (7) : 520-529. DOI: 10.19912/j.0254-0096.tynxb.2022-0376

多种木质素热解耦合催化重整反应特性及其产物研究

杨光, 张文杰, 沈德魁

作者信息 +

STUDY ON REACTION CHARACTERISTICS AND PRODUCTS OF PYROLYSIS COUPLED CATALYTIC REFORMING OF VARIOUS LIGNIN

Yang Guang, Zhang Wenjie, Shen Dekui

Author information +

文章历史 +

摘要

选用有机酸木质素（OAL）、有机乙醇溶木质素（OEL）、碱木质素（AL）和克拉森木质素（KL）进行热解耦合催化重整实验,研究不同种类木质素的反应特性及生成产物的规律。结果表明：催化重整反应可有效促进液体产物转化为气体产物和催化剂积碳,其中OEL的气体产率最高且n（H₂）∶n（CO）≈2∶1的合成气所占比例达65%。OAL对应积碳产率最高,主要为无定形碳并存在少部分由石墨层包裹Ni形成的“核-壳”式纳米颗粒。OEL对应积碳可同时观察到无定形碳、碳纳米纤维及碳纳米管,其中 “竹节状”碳纳米管形成机理是碳原子在Ni颗粒中的扩散方式不同。

Abstract

In this paper, organic acid lignin（OAL）, organic ethanol soluble lignin（OEL）, alkali lignin（AL） and Klason lignin（KL） were selected for pyrolysis-catalytic reforming to study the reaction characteristics and products rules. It is found that the conversion of liquid products into gas and coke can be effectively promoted by catalytic reforming reaction. OEL has the highest gas yield, and the percentage of syngas with the ratio of H₂/CO≈2 is 65%, which can be used for the preparation of methanol and ethanol. For the coke, OAL has the highest yield relative to other three kinds of lignin. It is mainly composed of amorphous carbon and there is a small part of "core-shell" nanoparticles formed by graphite layer wrapped Ni particles. Amorphous carbon, carbon nanofibers and carbon nanotubes can be observed simultaneously in the coke from OEL. The growth mechanism of "bamboo-like" carbon nanotubes is the different diffusion modes of carbon atoms in Ni particles.

导出引用

杨光, 张文杰, 沈德魁. 多种木质素热解耦合催化重整反应特性及其产物研究[J]. 太阳能学报. 2023, 44(7): 520-529 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0376

Yang Guang, Zhang Wenjie, Shen Dekui. STUDY ON REACTION CHARACTERISTICS AND PRODUCTS OF PYROLYSIS COUPLED CATALYTIC REFORMING OF VARIOUS LIGNIN[J]. Acta Energiae Solaris Sinica. 2023, 44(7): 520-529 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0376

中图分类号： TK6

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