| 摘要: |
| 采用全新的准平衡过程理论,对定容二元混合气体的水合物生成过程进行模拟,并将模拟的平衡终态与CSMGem软件预测值进行对比。结果表明:该模型可以精确预测最终平衡状态,所得平衡压力与CSMGem预测的相对误差不超过3％;准平衡理论与反应驱动力关联建立的模型可以反映出水合物生成过程中各参数的变化趋势;在定容体系中,可以通过水合物法进行CH4+CO2混合气的分离,CH4在气相得到提浓,CO2在水合物相中富集,并且随着反应的进行,系统压力的降低幅度减小,最终达到平衡状态,且高压低温条件对CO2气相的提浓起促进作用。 |
| 关键词: 水合物 气体分离 准平衡过程 相平衡 模型预测 |
| DOI：10.3969/j.issn.1673-5005.2011.05.020 |
| 分类号::TE 122.1 |
| 文献标识码:A |
| 基金项目:山东省自然科学基金项目(Z20937b2804027);中央高校基金科研业务费专项资金资助项目 (10CX04012A) |
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| Application of quasi equilibrium theory in CH4+CO2 separation model based on hydrate formation |
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TANG Jian feng, ZENG Da long, WANG Chuan lei
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(College of Pipeline and Civil Engineering in China University of Petroleum, Qingdao 266555, China)
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| Abstract: |
| Based on the quasi equilibrium process theory, the hydrate formation process of binary gases was simulated. The equilibrium final state was compared with the predictive value of software CSMGem. The results show that new model can accurately predict the final equilibrium state. The relative error of the equilibrium pressure and the prediction from CSMGem is less than 3%. In addition, the new model can also reflect the change of relevant parameters in the process of hydrate formation through combining with the driving force factor of process. In the constant volume system, CH4 will be concentrated in gas phase while CO2 in hydrate phase through hydrate separation method. The reduced magnitude of system pressure decreased in the process of hydrate formation. High pressure and low temperature conditions play a positive role on the separation effect. |
| Key words: hydrate gas separation quasi equilibrium process phase equilibrium model prediction |
