Optimization and performance analysis of nitrogen expansion liquefaction process for CBM with different nitrogen content |
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| Authors: | GAO Ting LIN Wen sheng GU An zhong and GU Min |
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| Institution: | Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, P.R.China;Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, P.R.China;Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, P.R.China;College of Resources and Environmental Science;Key Laboratory for the Exploitation of Southwest Resources & Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400030, P.R.China. |
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| Abstract: | A nitrogen expansion liquefaction process which is suitable for small-scale liquefaction plants is proposed for coalbed methane (CBM) with high nitrogen content. In order to investigate the effects of the nitrogen content on the liquefaction system performance, optimizations are done for CBM with nitrogen content among 0~70% via simulation and calculation with HYSYS when the liquefaction rate and the methane recovery rate are fixed respectively, and with the unit product liquefaction power consumption as the major index, the corresponding system performance is compared. The results show that, the system performance of CBM liquefaction process changes greatly along with nitrogen content. However, the changing is not monotonous. |
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| Keywords: | coalbed methane (CBM) liquefaction of gases process design optimization nitrogen expansion cycle power consumption |
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