Page 138 - 《精细化工》2023年第1期
P. 138
第 40 卷第 1 期 精 细 化 工 Vol.40, No.1
20 23 年 1 月 FINE CHEMICALS Jan. 2023
催化与分离提纯技术
成型方法对 Ni-CaO 双功能材料 CO 吸附与
2
催化转化一体化性能的影响
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余 钧 ,郭亚飞 ,王国栋 ,黄 浦 ,赵传文 ,王 涛
(1. 南京师范大学 能源与机械工程学院,江苏 南京 210046;2. 浙江大学 能源工程学院,浙江 杭州
310000)
摘要:CO 2 捕集-转化一体化工艺是实现碳中和的关键负排放技术,而兼具吸附和催化活性的双功能材料(DFMs)
构筑是关键。采用挤压法、挤压滚圆法和压片法构筑了柱状、球形和片状的 Ni-CaO DFMs,探究了成型方法对
Ni-CaO DFMs 的结构和 CO 2 吸附-催化一体化性能的影响。研究发现,成型方法会破坏 Ni-CaO DFMs 的孔隙结
构,对其 CO 2 体相扩散和吸附产生不利影响。在首次循环中,Ni-CaO 粉体在 650 ℃和体积分数为 10% CO 2 气
氛下的吸附容量高达 11.77 mmol CO 2 /g,在体积分数为 5% H 2 气氛下原位逆水煤气变换的 CO 产量达 4.81 mmol
CO/g;而成型 Ni-CaO DFMs 的 CO 2 吸附容量降至 9.67~10.33 mmol CO 2 /g,CO 2 催化转化率得到明显提升。成
型方法有利于提升 Ni-CaO DFMs 的 CO 2 吸附循环稳定性。在 12 次循环后,未成型 Ni-CaO 粉体的 CO 2 吸附容
量循环衰减率达 31.35%,而成型 Ni-CaO DFMs 的循环衰减率为 9.36%~24.23%。
关键词:Ni-CaO DFMs;成型方法;CO 2 吸附-催化一体化;逆水煤气变换;催化技术
中图分类号:X701;TB34 文献标识码:A
文章编号:1003-5214 (2023) 01-0130-09 开放科学 (资源服务) 标识码 (OSID):
Effects of granulation on structure and integrated CO 2 capture and
conversion performance of Ni-CaO dual function materials
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YU Jun , GUO Yafei , WANG Guodong , HUANG Pu , ZHAO Chuanwen , WANG Tao
(1. School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210046, Jiangsu, China;
2. College of Energy Engineering, Zhejiang University, Hangzhou 310000, Zhejiang, China)
Abstract: Integrated CO 2 capture and conversion (ICCC) represents a key negative emission technology in
achieving carbon neutrality, and development of dual function materials (DFMs) with high CO 2 sorption
and catalytic activity is essential. In this work, cylindrical, spherical and flake Ni-CaO DFMs were
synthesized via extrusion, extrusion spherization and squashing methods, respectively. Effects of granulation
on the structure and ICCC performance of Ni-CaO DFMs were then investigated. Results indicated that
granulation destroyed the porous structures of DFMs, thus showing adverse effect on CO 2 bulk diffusion
and adsorption of DFMs. At the first cycle, Ni-CaO powder exhibited a maximal CO 2 uptake of 11.77 mmol
CO 2/g at 650 ℃ and in presence of 10% volume fraction CO 2, and a high CO yield of 4.81 mmol CO/g via
in situ reverse water-gas shift reaction in presence of 5% volume fraction H 2. While granulated Ni-CaO
DFMs displayed a significantly decreased CO 2 adsorption capacity of 9.67~10.33 mmol CO 2/g, but
significantly improved catalytic conversion rate of CO 2. Meanwhile, granulation played an important role in
sustaining the CO 2 recycing adsorption stability of Ni-CaO DFMs. The Ni-CaO powder exhibited a high
cyclic attenuation rate of adsorption capacity of 31.35% for CO 2 capture after 12 recycles, while the DFMs
pellets showed a lower one (9.36%~24.23%).
收稿日期:2022-05-04; 定用日期:20022-07-13; DOI: 10.13550/j.jxhg.20220429
基金项目:国家自然科学基金青年基金(51806108);清洁能源利用国家重点实验室开放课题(ZJUCEU2020009)
作者简介:余 钧(1998—),女,硕士生,E-mail:1449240221@qq.com。联系人:郭亚飞(1990—),男,副教授,E-mail:yfguo@
njnu.edu.cn;赵传文(1983—),男,教授,E-mail:cwzhao@njnu.edu.cn。