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首页> 外文会议>International Technical Conference on Clean Coal and Fuel Systems >Development of a Segment-Based DEPG Physical Solvent Model for CO_2 Capture Processes
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Development of a Segment-Based DEPG Physical Solvent Model for CO_2 Capture Processes

机译：用于CO_2捕获过程的基于分段的DEPG物理溶剂模型的开发

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Development of accurate process models for CO_2 capture with the widely used physical solvent of dimethyl ethers of polyethylene glycol (DEPG) is highly desirable but very challenging due to scarcity of public literature data available wi DEPG solvent. This paper describes successful development and validation of an Aspen Plus DEPG physical solvent mode for CO_2 capture from a gas mixture of CO, CO_2, H_2, H_2O, N_2, Ar, CH_4, C_2H_6, NH_3, H_2S, and COS. DEPG solvent is a mixture of the dimethyl ethers of polyethylene glycol with formula CH_3O(C_2H_4O)_nCH_3 where n ranges from 2 to 9. This model treats each DEPG oligomer as a compound made up of a CH_3OCH_3 end segment and n C_2H_4O repeat segments. The literature data of vapor pressure, liquid density and liquid heat capacity for individual DEPG oligomers are used to determine parameters of CH_3OCH_3 and C_2H_4O segments for the copolymer PC-SAFT equation of state. The available vapor-liquid equilibrium data for selected gas components and DEPGs are further used to identify the PC-SAFT binary interaction parameters for various gas and segment pairs. Together, the limited public literature data of vapor pressure, liquid density, heat capacity, and phase equilibrium related to DEPGs and the predictive power of the copolymer PC-SAFT EOS allow for the successful development and validation of a DEPG physical solvent model for CO_2 capture processes. The model is further validated with commonly accepted design cases for CO_2 capture with DEPG solvent.
机译：利用聚乙二醇（DEPG​​）的二甲醚的广泛使用的物理溶剂（DEPG​​）的广泛使用的物理溶剂的捕获的精确工艺模型的开发是非常理想的，但由于公共文献数据可用Wi Depg溶剂，因此非常具有挑战性。本文介绍了来自CO，CO_2，H_2，H_2O，N_2，AR，CH_4，C_2H_6，NH_3，H_2S和COS的气体混合物的CO_2捕获的ASPEN PLUS DEPG物理溶剂模式的成功开发和验证。DEPG溶剂是一个聚乙二醇二甲醚的混合物与式CH_3O（C_2H_4O）_NCH_3，其中n范围为2至9.该模型将每种DEPG低聚物作为由CH_3OCH_3末端区段和N C_2H_4O重复段组成的化合物。用于各个DEPG低聚物的蒸气压，液体密度和液体热容量的文献数据用于确定CH_3OCH_3和C_2H_4O区段的共聚物PC-SAFT方程的参数。用于所选气体组分和DEPG的可用蒸汽液平衡数据还用于识别各种气体和段对的PC-SAFT二进制相互作用参数。与DEPG相关的蒸气压，液体密度，热容量和相平衡的有限公共文献数据以及共聚物PC-SAFT EOS的预测力允许成功开发和验证DEPG物理溶剂模型的CO_2捕获流程。通过DEPG溶剂进一步验证了该模型的CO_2捕获的常用设计案例。

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