Application of elevated temperature pressure swing adsorption in hydrogen production from syngas
- PDF / 1,149,036 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 53 Downloads / 189 Views
Application of elevated temperature pressure swing adsorption in hydrogen production from syngas Xuancan Zhu1,2 · Peixuan Hao1 · Yixiang Shi1 · Shuang Li1 · Ningsheng Cai1 Received: 11 August 2019 / Revised: 26 October 2019 / Accepted: 4 November 2019 © Springer Science+Business Media, LLC, part of Springer Nature 2019
Abstract A clean and energy-efficient power system can be developed by the combination of hydrogen (as an energy carrier) and fuel cells (as power generation units); such system has the potential to compete with the current energy consumption pattern of direct combustion of fossil fuels. A novel CO/CO2 purification process, called the elevated-temperature pressure swing adsorption (ET-PSA), is coupled into an integrated gasification fuel cell (IGFC) power plant system in this work. A quantitative evaluation standard for the purification energy consumption is developed by considering both the net power efficiency loss of the IGFC after introducing the purification unit, and the total CO/CO2 removal rate. The sensible heat loss of syngas and the thermal regeneration of the saturated adsorbents are avoided; consequently, the calculated energy consumption of the ET-PSA (1.11 MJ/kg) process using the ideal purification unit as the base case is 36.2% lower than of the conventional solvent absorption method. Alternatively, high-temperature steam is consumed in the ET-PSA process during the rinse and purge steps, which leads to a decrease in the output power of the steam turbine. The purification energy consumption of the ET-PSA process can be further reduced either by increasing the hydrogen recovery ratio or by reducing the total steam consumption. Keywords Elevated-temperature pressure swing adsorption · Hydrogen production · Energy consumption · Process optimization · Integrated gasification fuel cell Abbreviations E Specific CO/CO2 removal rate (kg/kWhe) HR Heat rate (kJ/kWhe) G Mass flow rate (kg/s) p Pressure (MPa) T Temperature (°C) η Net power efficiency (%) CCS Carbon capture and storage DOE Department of energy ET-PSA Elevated temperature pressure swing adsorption HP Hydrogen purity HRR Hydrogen recovery ratio * Shuang Li [email protected] 1
Key Laboratory for Thermal Science and Power Engineer of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 10084, China
Key Laboratory of Power Mechanical Engineering, Institute of Refrigeration and Cryogenics, MOE China, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
2
HRSG Heat recovery steam generator IGCC Integrated gasification combined cycle IGFC Integrated gasification fuel cell NT-PSA Normal temperature pressure swing adsorption PEMFC Proton exchange membrane fuel cell P/F ratio Purge-to-feed ratio REF Reference case R/F ratio Rinse-to-feed ratio SOFC Solid oxide fuel cell SPECCA Specific primary energy consumption for carbon avoided WGS Water gas shift
1 Introduction At present, despite the existence of a few commercialscale carbon captur
Data Loading...
