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首页> 外文期刊>Journal of natural gas science and engineering >Performance evaluation of clinoptilolite and 13X zeolites in CO2 separation from CO2/CH4 mixture
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Performance evaluation of clinoptilolite and 13X zeolites in CO2 separation from CO2/CH4 mixture

机译：斜发沸石和13X沸石从CO2 / CH4混合物中分离CO2的性能评估

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In this study, the adsorption performance of clinoptilolite and 13X zeolites as adsorbent was examined to remove CO2 from CO2/CH4 mixture. The adsorption experiments of CO2 and CH(4)on 13X and clinoptilolite zeolites were conducted at 277, 290 and 310 K for pressures up to 10 bar. The adsorption capacity of CO2 on 13X zeolite was higher than clinoptilolite zeolite. The ideal selectivity of CO2/CH4 for 13X and clinoptilolite zeolites are 8.47 and 5.63 at 277 K and 1 bar, respectively. The adsorption heats for the two gases on adsorbents were calculated using the van't Hoff equation. The values of adsorption heats of CO2 and CH4 for 13X zeolite are 34.65 and 15.43 kJ/mol, whereas adsorption heats of CO2 and CH4 on clinoptilolite zeolite are 21.03 and 11.62 kJ/mol, respectively. The highest adsorption heat was obtained for adsorption of CO2 on 13X zeolite, which refers to the strong adsorption of CO2 on the surface of this zeolite. The extended Langmuir and Sips models were utilized to correlate the experimental data, and Sips model showed a better fit of the data. According to the results of this study, it was found that the 13X zeolite is a more appropriate adsorbent for removing carbon dioxide from natural gas, compared with clinoptilolite. (C) 2015 Elsevier B.V. All rights reserved.
机译：在这项研究中，研究了斜发沸石和13X沸石作为吸附剂的吸附性能，以从CO2 / CH4混合物中去除CO2。 CO2和CH（4）在13X和斜发沸石上的吸附实验是在277、290和310 K的压力下进行的，最高压力为10 bar。在13X沸石上，CO2的吸附能力高于斜发沸石。 13X和斜发沸石沸石的理想CO2 / CH4选择性在277 K和1 bar下分别为8.47和5.63。使用van't Hoff方程计算两种气体在吸附剂上的吸附热。 13X沸石的CO2和CH4吸附热值为34.65和15.43 kJ / mol，斜发沸石上的CO2和CH4吸附热分别为21.03和11.62 kJ / mol。对于13X沸石上的CO2吸附，获得了最高的吸附热，这是指CO2在这种沸石表面上的强烈吸附。利用扩展的Langmuir模型和Sips模型来关联实验数据，而Sips模型显示出更好的数据拟合度。根据这项研究的结果，发现与斜发沸石相比，13X沸石是更适合从天然气中去除二氧化碳的吸附剂。 （C）2015 Elsevier B.V.保留所有权利。

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