Modelling and analysis of a novel production process of high-pressure hydrogen with CO2 separation using electrochemical compressor and LFR solar collector

Adib Shabani, Mehdi Mehrpooya and Maryam Pazoki

Renewable Energy, 2023, vol. 210, issue C, 776-799

Abstract: Hydrogen as an alternative fuel has a very promising future. Using renewable solar energy to produce green hydrogen is one of the most interesting approaches due to its environmental friendliness. In this study, a novel system configuration is designed and studied that includes electrochemical compressor (EHC), hybrid thermionic-thermoelectric converter (TIG-TEG), and a solar linear Fresnel collector system (LFR). The EHC can produce a hydrogen product at a high pressure with a high purity. Moreover, using a 50/50 H2–CO2 feed a pure CO2 byproduct can be separated from the process. A detailed mathematical modelling considering several key phenomena of the EHC and the TIG-TEG converter is presented with a full variable list that haven't been reported to such extent yet. Simulation is performed in MATLAB and a sensitivity analysis to assess the performance of each subsystem and the overall system is conducted. Results show that several operating conditions and state performances have the same end-results in terms of hydrogen production rate. Further, it is found that the LFR thermal efficiency of 61.67% and a solar fraction of 73.03% can be achieved. Also, maximum output power and efficiency of the hybrid converter as 19.85 kW and 44.76% is realized. As such, 93 units of EHC at a current density of 1 A/cm2 could be operated to produce hydrogen of 50 atm pressure at a rate of 2.17 kg/h.

Keywords: Electrochemical compressor; Thermionic generator; Thermoelectric generator; Linear fresnel collector; Sensitivity analysis (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:210:y:2023:i:c:p:776-799

DOI: 10.1016/j.renene.2023.04.112

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