| CHEMISTRY AND CHEMICAL ENGINEERING |
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Coordinated optimization of hydrogen networks with purification reuse coupled with a shortcut model of the pressure swing adsorption |
| DENG Chun1, ZHOU Yeyang1, JIANG Wei1, FENG Xiao2 |
1. State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum-Beijing, Beijing 102249, China;
2. School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China |
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Abstract Pressure swing adsorption (PSA) is used to purify hydrogen streams with the upgraded streams reused by hydroprocessing units to increase the hydrogen supply in refineries. This study used a PSA shortcut model to construct a hydrogen network design with purification reuse. The mathematical model used the minimum hydrogen utility as the objective function with the commercial optimization software GAMS (general algebraic modeling system) to solve the problem with DICOPT (discrete and continuous optimizer) as the solver. The results of a case study show that the PSA device has the optimal inlet hydrogen purity. As the adsorption and desorption pressure ratio increases and the adsorbent selectivity decreases, the PSA hydrogen recovery increases and the hydrogen utility decreases. The hydrogen network optimization shows that designers should not blindly increase the PSA inlet hydrogen purity to enhance the hydrogen recovery.
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| Keywords
process system
hydrogen network
optimization
mathematical programming
pressure swing adsorption (PSA)
purification reuse
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Issue Date: 15 July 2016
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2016,
Vol. 56
