烧焦
木屑
催化作用
复合数
产量(工程)
生物量(生态学)
反应机理
活化能
化学
非阻塞I/O
材料科学
化学工程
复合材料
冶金
热解
有机化学
工程类
海洋学
地质学
作者
Weihong Jiao,Xiaoxiao Ding,Shuai Yan,Zhifeng Yan,Weiyong Jiao,Zhiqing Wang,Yitian Fang
标识
DOI:10.1016/j.biortech.2024.130399
摘要
The utilization of biomass char was hindered by the low gasification activity due to thick ring structures and unclear gasification mechanism. Herein, the mechanism was elucidated by experimental and DFT to improve the activity. The results demonstrated that temperature increased the gasification activity but did not changed the order of gasification activity of samples. Pressure dominated the position of the highest point of instantaneous CH4 yield, and high pressure enhanced carbon conversion by 81.72 % and 7.32 times. Moreover, KNi exhibited an uppermost catalytic activity with the instantaneous CH4 yield 1.89 times higher than that of raw char at 750 °C. The formation of the CxNi structure lowered the activation barrier for the ring opening reaction. Possible transformation pathways of Ni species were as follows: Ni(NO3)2·6H2O → NiO → Ni. KNi changed the reaction pathways and the most energy-consuming step. The study could shed light on the hydrogasification reaction mechanism.
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