摘要
太阳能光热技术的发展赋予了甲烷干气重整(DRM)反应在消耗CO;的同时将太阳能转化为化学燃料的能力,对能源利用以及环境改善具有重要意义,因此DRM过程再度引发关注。而在最有望实现DRM反应工业化应用的Ni基催化剂中,较小的Ni颗粒粒径能增强催化剂抗积炭、抗烧结能力及催化活性,可显著提升DRM反应效率。综述了Ni基催化剂中Ni颗粒粒径对抗积炭、抗烧结以及催化活性的影响,归纳总结了最优粒径范围、粒径常用调控策略以及Ni基催化剂规模化制备方法,并从太阳能光热催化DRM反应角度阐述了Ni基催化剂的应用前景。总结认为,催化剂活性随着Ni颗粒粒径的减小而升高,理论上当Ni颗粒粒径在6.0 nm左右时具有最优的抗烧结能力;Ni基催化剂中形成积炭的Ni颗粒粒径临界尺寸在3.0~10.0 nm之间,当Ni颗粒粒径大于临界尺寸时,粒径越小,积炭形成速率越小。本工作可为研发新型高效DRM反应用Ni基催化剂提供思路和启发。
The development of solar thermal technology endows the dry reforming of methane(DRM) reaction with the ability to convert solar energy into chemical fuels while consuming CO;, which is of great significance to energy utilization and environmental improvement. Therefore, the DRM process has attracted attention again. Among the Ni-based catalysts that are most promising for the industrial application of DRM reactions, the smaller Ni particle size can enhance the anti-coking, anti-sintering ability and catalytic activity of the catalysts, thus significantly improving the DRM reaction efficiency. Therefore, the effects of Ni particle size on anticoking, anti-sintering and catalytic activity in Ni-based catalysts were reviewed, the optimal particle size range, common control strategies of particle size and large-scale preparation methods of Ni-based catalysts were summarized, and the application prospect of Ni-based catalysts was expounded from the perspective of thermocatalytic DRM reaction. It is concluded that the catalyst activity increases with the decrease of the Ni particle size. In theory, when the Ni particle size is about 6.0 nm, it has the optimal anti-sintering ability. Between 3.0 nm to 10.0 nm, when the Ni particle size is larger than the critical size, the smaller the particle size, the smaller the coke formation rate. This work can provide ideas and inspiration for the development of new and efficient Ni-based catalysts for DRM reactions.
作者
丁晨旭
汤睿
钱渊
申淼
张修庆
赵素芳
DING Chenxu;TANG Rui;QIAN Yuan;SHEN Miao;ZHANG Xiuqing;ZHAO Sufang(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China)
出处
《天然气化工—C1化学与化工》
CAS
北大核心
2022年第2期1-10,共10页
Natural Gas Chemical Industry
关键词
甲烷干气重整
NI基催化剂
粒径
太阳能
dry reforming of methane
Ni-based catalyst
particle size
solar energy
