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Synergistic effects of CO2 on ex situ catalytic pyrolysis of lignocellulosic biomass over a Ni/SiO2 catalyst
Journal of CO2 Utilization ( IF 7.7 ) Pub Date : 2020-05-12 , DOI: 10.1016/j.jcou.2020.101182
Seong-Heon Cho , Sungyup Jung , Young-Kwon Park , Yiu Fai Tsang , Changkook Ryu , Eilhann E. Kwon

This work laid emphasis on catalytic pyrolysis of Styrax japonicus to construct a biomass-to-energy conversion platform. CO2 was particularly chosen to enhance the catalytic pyrolysis of the biomass waste, in reference to N2-purged pyrolysis. The specific roles of CO2 on pyrolysis of S. japonicus in line with synergistic effect of Ni-based catalysts was investigated. It was shown that CO2 played as an oxidant for CO formation via homogeneous gas phase reaction of CO2 with volatile organic carbons (VOCs) liberated from the thermolysis of S. japonicus. Ni/SiO2 catalyst expedited dehydrogenation (DH) of the VOCs, resulting in significant H2 generation and alteration of aromaticity in VOCs. Each CO2 and Ni catalyst independently enhanced CO and H2 formation, respectively, and their synergistic effects were shown at ≥ 600 °C. Coke deposition on the Ni/SiO2 catalyst was confirmed after catalytic pyrolysis, while the suppression of coke formation on the catalyst surface was achieved under the CO2 environment.



中文翻译:

Ni / SiO 2催化剂上CO 2对木质纤维素生物质异位催化热解的协同作用

这项工作侧重于日本菊(Styrax japonicus)的催化热解,以构建生物质-能量转化平台。相对于N 2净化的热解,特别地选择CO 2以增强生物质废物的催化热解。CO的特定角色2上的热解S.刺参与Ni基催化剂的协同作用线进行了研究。结果表明,CO 2通过CO 2日本血吸虫热解所释放的挥发性有机碳(VOC)的均相气相反应,作为CO形成的氧化剂。镍/二氧化硅2催化剂加速了VOC的脱氢(DH),导致显着的H 2生成和VOC中芳香性的改变。每种CO 2和Ni催化剂分别独立地增强了CO和H 2的形成,并且在≥600°C下显示了它们的协同作用。催化热解后,证实了焦炭沉积在Ni / SiO 2催化剂上,而在CO 2环境下,抑制了焦炭在催化剂表面的形成。

更新日期:2020-05-12
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