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Adsorption Property of Starch-Based Microporous Carbon Materials with High Selectivity and Uptake for C1/C2/C3 Separation
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-03-18 , DOI: 10.1021/acs.iecr.0c05916 Zhanfan Ke 1 , Huiyu Xiao 1 , Yijing Wen 1 , Shengjun Du 1 , Xin Zhou 1 , Jing Xiao 1 , Zhong Li 1, 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-03-18 , DOI: 10.1021/acs.iecr.0c05916 Zhanfan Ke 1 , Huiyu Xiao 1 , Yijing Wen 1 , Shengjun Du 1 , Xin Zhou 1 , Jing Xiao 1 , Zhong Li 1, 2
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Recovering light hydrocarbons from natural gas is of great significance in the petrochemical industry. In this work, starch-based microporous carbon materials (SMCs) were prepared using starch as a carbon source and characterized for their pore structure and surface chemistry. CH4, C2H6, and C3H8 isotherms of SMCs were determined using a volumetric method. The breakthrough experiments were carried out to evaluate the dynamic separation performance. A grand canonical Monte Carlo simulation was conducted to reveal the adsorption mechanism of these light hydrocarbons on the SMCs. Results showed that the resulting SMCs exhibited a high specific surface area of 1999 m2/g and a narrow pore size distribution within 0.5–2.0 nm. Particularly, SMCs displayed extremely high ethane and propane uptakes at 298 K and 100 kPa, reaching 5.28 mmol/g for C2H6 and 8.39 mmol/g for C3H8. Moreover, SMCs showed an ultrahigh selectivity of 27.1 for C2H6/CH4 mixtures under ambient conditions, which exceeded that of many metal–organic frameworks. Thus, SMCs have the potential for recovering light hydrocarbons from natural gas.
中文翻译：
淀粉基微孔碳材料对C1 / C2 / C3分离的高选择性和吸收性
从天然气中回收轻质碳氢化合物在石化工业中具有重要意义。在这项工作中，使用淀粉作为碳源制备了淀粉基微孔碳材料（SMCs），并对其孔结构和表面化学特性进行了表征。使用体积法确定SMC的CH 4，C 2 H 6和C 3 H 8等温线。进行了突破性实验以评估动态分离性能。进行了大的经典蒙特卡洛模拟，以揭示这些轻质烃在SMC上的吸附机理。结果表明，所得SMC显示出1999 m 2的高比表面积/ g，孔径分布在0.5-2.0 nm之间。特别是，SMC在298 K和100 kPa时显示出极高的乙烷和丙烷吸收率，C 2 H 6达到5.28 mmol / g，C 3 H 8达到8.39 mmol / g 。此外，SMC在环境条件下对C 2 H 6 / CH 4混合物显示出27.1的超高选择性，超过了许多金属有机骨架的选择性。因此，SMC具有从天然气中回收轻烃的潜力。
更新日期：2021-03-31
中文翻译：
淀粉基微孔碳材料对C1 / C2 / C3分离的高选择性和吸收性
从天然气中回收轻质碳氢化合物在石化工业中具有重要意义。在这项工作中，使用淀粉作为碳源制备了淀粉基微孔碳材料（SMCs），并对其孔结构和表面化学特性进行了表征。使用体积法确定SMC的CH 4，C 2 H 6和C 3 H 8等温线。进行了突破性实验以评估动态分离性能。进行了大的经典蒙特卡洛模拟，以揭示这些轻质烃在SMC上的吸附机理。结果表明，所得SMC显示出1999 m 2的高比表面积/ g，孔径分布在0.5-2.0 nm之间。特别是，SMC在298 K和100 kPa时显示出极高的乙烷和丙烷吸收率，C 2 H 6达到5.28 mmol / g，C 3 H 8达到8.39 mmol / g 。此外，SMC在环境条件下对C 2 H 6 / CH 4混合物显示出27.1的超高选择性，超过了许多金属有机骨架的选择性。因此，SMC具有从天然气中回收轻烃的潜力。
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