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Reversible Removal of SO2 with Amine-Functionalized ZIF8 Dispersed in n-Heptanol
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-03-09 , DOI: 10.1021/acs.energyfuels.0c04271 Xiaoqing Xu 1 , Peng Wu 2 , Changyong Li 3 , Keyong Zhao 1 , Chiran Wang 1 , Renpan Deng 1 , Jinli Zhang 1
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-03-09 , DOI: 10.1021/acs.energyfuels.0c04271 Xiaoqing Xu 1 , Peng Wu 2 , Changyong Li 3 , Keyong Zhao 1 , Chiran Wang 1 , Renpan Deng 1 , Jinli Zhang 1
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In this work, amine-functionalized ZIF8 (i.e., ZIF8-A) was dispersed in n-heptanol (ZIF8-A/n-heptanol) to remove SO2. The effects of ZIF8-A proportion, SO2 concentration, and absorption and desorption temperatures on the removal of SO2 were systematically investigated. The experimental results showed that the activity of ZIF8-A on SO2 removal was enhanced after being dispersed in n-heptanol. The SO2 saturation capacity increased with increasing proportion of ZIF8-A and SO2 concentration. The optimal temperatures for SO2 absorption and desorption were found to be 25 and 120 °C, respectively. Under the optimal experimental conditions (25 °C and 4% SO2), the SO2 saturation capacity was 589 mg/g. Five continuous absorption–desorption cycles suggested a good regeneration performance. Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, ultraviolet analyses, and computational simulation indicated that SO2 mainly interacted with ZIF8-A via hydrogen bonds besides physical absorption. The simulation results further indicated that the enhanced SO2 adsorption performance of ZIF8-A when dispersed in n-heptanol was due to the lower self-diffusion coefficient and higher isosteric heat of SO2 molecules in ZIF8-A/n-heptanol.
中文翻译：
分散在正庚醇中的胺官能化ZIF8可逆去除SO 2
在这项工作中，将胺官能化的ZIF8（即ZIF8-A）分散在正庚醇（ZIF8-A /正庚醇）中以除去SO 2。系统地研究了ZIF8-A比例，SO 2浓度以及吸收和解吸温度对SO 2去除的影响。实验结果表明，分散在正庚醇中后，ZIF8-A去除SO 2的活性增强。随着ZIF8-A的比例和SO 2浓度的增加，SO 2的饱和容量增加。SO 2的最佳温度发现吸收和解吸分别为25和120℃。在最佳实验条件下（25°C和4％SO 2），SO 2饱和容量为589 mg / g。五个连续的吸收-解吸循环表明了良好的再生性能。傅里叶变换红外光谱，X射线光电子能谱，紫外分析和计算模拟表明，SO 2除了物理吸收外，主要还通过氢键与ZIF8-A相互作用。模拟结果进一步表明，ZIF8-A分散在正庚醇中时对SO 2的吸附性能增强是由于SO 2的自扩散系数较低和等排热较高。ZIF8-A /正庚醇中的分子。
更新日期：2021-03-18
中文翻译：
分散在正庚醇中的胺官能化ZIF8可逆去除SO 2
在这项工作中，将胺官能化的ZIF8（即ZIF8-A）分散在正庚醇（ZIF8-A /正庚醇）中以除去SO 2。系统地研究了ZIF8-A比例，SO 2浓度以及吸收和解吸温度对SO 2去除的影响。实验结果表明，分散在正庚醇中后，ZIF8-A去除SO 2的活性增强。随着ZIF8-A的比例和SO 2浓度的增加，SO 2的饱和容量增加。SO 2的最佳温度发现吸收和解吸分别为25和120℃。在最佳实验条件下（25°C和4％SO 2），SO 2饱和容量为589 mg / g。五个连续的吸收-解吸循环表明了良好的再生性能。傅里叶变换红外光谱，X射线光电子能谱，紫外分析和计算模拟表明，SO 2除了物理吸收外，主要还通过氢键与ZIF8-A相互作用。模拟结果进一步表明，ZIF8-A分散在正庚醇中时对SO 2的吸附性能增强是由于SO 2的自扩散系数较低和等排热较高。ZIF8-A /正庚醇中的分子。
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