Porous hydrogen-bonded organometallic frameworks for adsorption separation of acetylene and carbon dioxide

doi:10.11949/j.issn.0438-1157.20161055

Abstract

Abstract:

Two porous hydrogen-bonded organometallic frameworks, termed as MPM-1-Br and MPM-1-Cl, were synthesized from adenine and CuBr₂(or CuCl₂) at room temperature by slow diffusion method.The synthesized materials were characterized by analysis techniques including SEM, PXRD, TGA and specific surface area analysis.Single-component adsorption isotherms for acetylene and carbon dioxide on these materials were also determined.The experimental results revealed that MPM-1-Br and MPM-1-Cl have moderately high BET surface(373 m²·g^-1, 417 m²·g^-1), and they show good thermo stability at temperature up to 240℃.The calculations were performed using the ideal adsorbed solution theory(IAST) based on the single-component adsorption isotherms, obtaining the adsorption selectivity of MPM-1-Br and MPM-1-Cl for binary mixture of acetylene and carbon dioxide(50:50, volume ratio) to be 3.8 and 3.0 at temperature of 298 K and total pressure of 100 kPa, respectively, which are comparable to those on HKUST-1 and UTSA-30.

Key words: hydrogen-bonded organometallic framework, low diffusion method, adsorption, separation, acetylene, carbon dioxide

摘要：

以腺嘌呤和溴化铜（氯化铜）为原料，采用慢扩散合成法，合成多孔氢键金属-有机框架材料MPM-1-Br和MPM-1-Cl。采用SEM、PXRD、TGA及比表面积分析等技术对材料进行综合表征，并测定了此二种同构多孔氢键金属-有机框架材料对乙炔和二氧化碳单组分气体的吸附等温线。实验结果表明，MPM-1-Br和MPM-1-Cl的比表面积分别为373 m²·g^-1和417 m²·g^-1，且在<240℃的温度范围内有良好的稳定性；在298 K和总压100 kPa下，通过IAST理论计算得到其对C₂H₂/CO₂混合气体（体积比50：50）的吸附选择性分别达到了3.8和3.0，与HKUST-1（4.7）和UTSA-30（3.3）等金属-有机框架材料有相当的分离性能。

关键词: 氢键金属-有机框架材料, 慢扩散合成法, 吸附, 分离, 乙炔, 二氧化碳

CLC Number:

TQ021.4

XIE Danyan, XING Huabin, ZHANG Zhiguo, YANG Qiwei, YANG Yiwen, REN Qilong, BAO Zongbi. Porous hydrogen-bonded organometallic frameworks for adsorption separation of acetylene and carbon dioxide[J]. CIESC Journal, 2017, 68(1): 154-162.

谢丹妍, 邢华斌, 张治国, 杨启炜, 杨亦文, 任其龙, 鲍宗必. 多孔氢键金属-有机框架材料对乙炔和二氧化碳的吸附分离[J]. 化工学报, 2017, 68(1): 154-162.

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