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Khuram Maqsood,Saibal Ganguly,Jayita Pal,Dhanaraj Turunawarasu,Anindya Jyoti Pal 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.7
A novel concept of hybrid cryogenic distillation network has been explored which maximizes the benefitsof both desublimation or solid-vapor based separation as well as distillation or vapor-liquid equilibrium based separationduring the separation of carbon dioxide from methane or natural gas. Process network synthesis has been performedfor four case studies with high carbon dioxide (72 mole%) and medium carbon dioxide (50 mole%) natural gas feedstreams. The benefits of optimal locations for cryogenic packed beds were investigated. A conventional cryogenic networkconsisting of multiple distillation columns with butane as additive for extractive distillation was also studied andpresented in this paper. Process modeling of cryogenic distillation network with MESH equations was attempted usingan integrated dual loop (C+3) convergence and the results were compared with Aspen Plus simulator for benchmarking. The prediction of solidification region was employed using experimental data from literature to avoid solidificationregions in the column. The proposed hybrid cryogenic distillation network showed promising potential for energy andsize reduction.