Hydrogen and light hydrocarbon components are essential resources of the refinery.The optimization of the refinery hydrogen system and recovery of the light hydrocarbon components contained in the gas streams are key strategies to reduce the operating costs for sustainable development.Many research efforts have been focused on the optimization of single impurity hydrogen network,and the flowrates of the hydrogen sources and sinks are assumed to be constant.However,their flowrates vary along with the quality of crude oil and refinery processing plans.A general superstructure of multicomponent refin-ery hydrogen network is proposed,which considers four components,namely H2,H2S,CH4 and C2+,as well as the flowrate variations of hydrogen source and hydrogen sink.The mathematical model based on the superstructure is developed with objective functions,including the minimization of total annual-ized cost and the maximization of overall satisfaction of the hydrogen network.Moreover,the model con-siders the removal of hydrogen sulfide and the recovery of light hydrocarbon components(i.e.,C2+)in the optimization.To verify the applicability of the proposed mathematical model,a simplified industrial case study with four scenarios is solved.The optimization results show that the economic benefit can be max-imized by considering both the direct reuse of gas streams from high-pressure separator(HP gas stream)and from low-pressure separator(LP gas stream)and the recovery of the light hydrocarbon streams.The fuzzy optimization method can be used to guide the optimal design of the refinery hydrogen system with multi-period variable flowrates.

Chun Deng;Xuantong Lu;Qixin Zhang;Jian Liu;Jui-Yuan Lee;Xiao Feng

State Key Laboratory of Heavy Oil Processing,College of Chemical Engineering and Environment,China University of Petroleum,Beijing 102249,China;PetroChina Daqing Petrochemical Company,Daqing 163000,China;Department of Chemical Engineering and Biotechnology,National Taipei University of Technology,Taipei 10608,China;School of Chemical Engineering&Technology,Xi'an Jiaotong University,Xi'an 710049,China

中国化学工程学报（英文版）

[1]Chun Deng;Xuantong Lu;Qixin Zhang;Jian Liu;Jui-Yuan Lee;Xiao Feng-.Fuzzy optimization design of multicomponent refinery hydrogen network)[J].中国化学工程学报（英文版）,2022(08):125-139

refinery,flowrates,refin,imized

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