Testing of hydrotalcite-based sorbents for CO2 and H2S capture for use in sorption enhanced water gas shift |
| |
| Authors: | HAJ van Dijk S Walspurger PD Cobden RW van den Brink FG de Vos |
| |
| Institution: | 1. Energy research Centre of the Netherlands, P.O. Box 1, 1755 ZG Petten, The Netherlands;2. KEMA, P.O. Box 9035, 6800 ET Arnhem, The Netherlands;1. CIEMAT, Energy Department, Madrid, Spain;2. National Centre for Experimentation in Hydrogen Technologies and Fuel Cells (CNETHPC), Madrid, Spain;1. Energy research Centre of the Netherlands (ECN), Sustainable Process Technology, Westerduinweg 3, 1755 LE Petten, The Netherlands;2. Delft University of Technology, Catalysis Engineering, Julianalaan 136, 2628 BL Delft, The Netherlands;3. Vattenfall, R&D projects, Hoekenrode 8, 1102 BR Amsterdam, The Netherlands;1. Centre for Emerging Technologies, Jain Global Campus, Jain University, Jakkasandra Post, Kanakapura Taluk, Ramangaram District 562 112, Karnataka, India;2. Central Power Research Institute, P.B No. 8066, Sir C.V. Raman Road, Bangalore 560 080, Karnataka, India;3. Ceramic Technological Institute, Bharat Heavy Electricals Ltd., Prof. CNR Rao Circle, Malleswaram, Bangalore 560012, Karnataka, India;1. Energy Research Centre of the Netherlands (ECN), The Netherlands;2. Politecnico di Milano (PTM), Dipartimento di Energ, Italy;3. SINTEF, Norway;4. BP Alternative Energy, UK;5. Air products PLC, UK;1. Energy and Process Engineering Department, Norwegian University of Science and Technology, 7491 Trondheim, Norway;2. TDW Offshore Services, 4033 Stavanger, Norway |
| |
| Abstract: | The feasibility of the sorption enhanced water gas shift (SEWGS) process under sour conditions is shown. The sour-SEWGS process constitutes a second generation pre-combustion carbon capture technology for the application in an IGCC. As a first critical step, the suitability of a K2CO3 promoted hydrotalcite-based CO2 sorbent is demonstrated by means of adsorption and regeneration experiments in the presence of 2000 ppm H2S. In multiple cycle experiments at 400 °C and 5 bar, the sorbent displays reversible co-adsorption of CO2 and H2S. The CO2 sorption capacity is not significantly affected compared to sulphur-free conditions. A mechanistic model assuming two different sites for H2S interaction explains qualitatively the interactions of CO2 and H2S with the sorbent. On the type A sites, CO2 and H2S display competitive sorption where CO2 is favoured. The type B sites only allow H2S uptake and may involve the formation of metal sulphides. This material behaviour means that the sour-SEWGS process likely eliminates CO2 and H2S simultaneously from the syngas and that an almost CO2 and H2S-free H2 stream and a CO2 + H2S stream can be produced. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
