Sorption-enhanced water gas shift reaction using multi-section column for high-purity hydrogen production

Abstract Simultaneous execution of the water gas shift (WGS) reaction and CO2 separation in the sorption-enhanced water gas shift (SE-WGS) reaction has emerged as a method of enhancing hydrogen production. Herein, a multi-section column was proposed and applied as a new concept for enhancing the efficiency of the SE-WGS reaction. Conventional SE-WGS utilizes a single-section column in which the catalyst and sorbent are packed throughout the column at the same ratio, whereas in the proposed system, the column is divided into multiple sections, and the ratio of catalyst and sorbent are varied in each section. CO conversion and H2 productivity in the two-section column SE-WGS reaction were investigated based on numerical simulations employing various ratios of catalyst and sorbent in each section of the column. The CO conversion and H2 productivity could be maximized in the novel two-section SE-WGS reaction by increasing the catalyst content of the first section and the sorbent content of the second section.

[1]  Jae-goo Lee,et al.  Preparation of CuO-CeO2-Al2O3 catalyst with mesopore structure for water gas shift reaction , 2009 .

[2]  O. Levenspiel.  Chemical Reaction Engineering , 1972 .

[3]  D. Jansen,et al.  Sorption-enhanced hydrogen production for pre-combustion CO2 capture: Thermodynamic analysis and experimental results , 2007 .

[4]  Ki Bong Lee,et al.  Production of fuel-cell grade hydrogen by thermal swing sorption enhanced reaction concept , 2008 .

[5]  Ki Bong Lee,et al.  High-purity hydrogen production through sorption enhanced water gas shift reaction using K2CO3-promoted hydrotalcite , 2012 .

[6]  D. Moon,et al.  R&D Trends and Unit Processes of Hydrogen Station , 2005 .

[7]  J. Natowitz,et al.  Our Energy Future , 2009 .

[8]  Harvey G. Stenger,et al.  Water gas shift reaction kinetics and reactor modeling for fuel cell grade hydrogen , 2003 .

[9]  Da Rosa,et al.  Fundamentals of renewable energy processes , 2005 .

[10]  Douglas P. Harrison,et al.  Simultaneous shift reaction and carbon dioxide separation for the direct production of hydrogen , 1994 .

[11]  Rodney John Allam,et al.  Chapter 13 – Development of the Sorption Enhanced Water Gas Shift Process , 2005 .

[12]  S. Sircar,et al.  Chemisorption of carbon dioxide on potassium-carbonate-promoted hydrotalcite. , 2007, Journal of colloid and interface science.

[13]  R. Siriwardane,et al.  Sorption-enhanced water gas shift reaction by sodium-promoted calcium oxides , 2010 .

[14]  Ki Bong Lee,et al.  Performance of Na2O promoted alumina as CO2 chemisorbent in sorption-enhanced reaction process for simultaneous production of fuel-cell grade H2 and compressed CO2 from synthesis gas , 2008 .

[15]  M. E. Bretado,et al.  Hydrogen production by absorption enhanced water gas shift (AEWGS) , 2010 .

[16]  Jeffrey Raymond Hufton,et al.  Sorption-enhanced reaction process , 1996 .

[17]  Ki Bong Lee,et al.  Reversible chemisorption of carbon dioxide: simultaneous production of fuel-cell grade H2 and compressed CO2 from synthesis gas , 2007 .