Robust Nickel-Based Metal-Organic Framework for Highly Efficient Methane Purification and Capture
Robust Nickel-Based Metal-Organic Framework for Highly Efficient Methane Purification and Capture
复制标题
用于高效甲烷纯化和捕获的坚固镍基金属有机框架。
DOI：
10.1021/acsami.1c23249
复制
发表时间：
2022-01-11
影响因子：
9.5
通讯作者：
Xia, Qibin
中科院分区：
文献类型：
--
作者：
Tu, Shi;Yu, Liang;Xia, Qibin
开发高效节能的天然气甲烷（CH 4）净化和煤矿瓦斯甲烷捕集技术是化工行业的重要课题。在这里，我们报告了一个强大的镍基金属有机框架（MOF），Ni-BPZ，具有一维（1D）菱形通道装饰丰富的吡唑环。Ni-BPZ对C_2H_6/CH_4和CH_4/N-2两种二元混合物均具有优良的分离性能。Ni-BPZ的C2 H6/CH 4选择性高达50.2，超过了大多数已报道的MOF吸附剂，同时在298 K和0.1 bar下具有2.46 mmol/g的C2 H6吸收。Ni-BPZ的CH 4/N2-选择性达到6.6，其高CH 4吸收率为1.56 mmol/g，也上级大多数高性能CH 4吸附剂。分子模拟结果表明，具有丰富吡唑环的一维菱形孔道为高效的C2 H6/CH 4和CH 4/N-2分离提供了高密度的潜在吸附位.
Developing energy-efficient alternatives for methane (CH4) purification from natural gas and methane capture of coal-mine gas is of great significance and challenge in the chemical industry. Herein, we report a robust nickel-based metal-organic framework (MOF), Ni-BPZ, featuring one-dimensional (1D) rhombic channels decorated with abundant pyrazole rings. Ni-BPZ exhibits excellent separation performance toward both C2H6/CH4 and CH4/N-2 binary mixtures. The C2H6/CH4 selectivity of Ni-BPZ is high, up to 50.2, exceeding those of most MOF adsorbents reported, and it simultaneously possesses a remarkable C2H6 uptake of 2.46 mmol/g at 298 K and 0.1 bar. The CH4/N-2 selectivity of Ni-BPZ reaches 6.6, and its high CH4 uptake is 1.56 mmol/g, which is also superior to most high-performance CH4 adsorbents. The molecular simulation reveals that the uniform 1D rhombic channels with abundant pyrazole rings provide a high density of potential adsorption sites for efficient C2H6/CH4 and CH4/N-2 separations.