Investigation of hydrogen production from model bio-syngas with high CO2 content by water-gas shift reaction. (22nd March 2015)

• Record Type: Journal Article
• Authors: Chu, Hsuanyu; Li, Qinghai; Meng, Aihong; Zhang, Yanguo
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 11(2015)
• Page Start: 4092
• Page End: 4100
• Publication Date: 2015-03-22
• Subjects: Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.01.170
• Languages: English
• ISSNs: 0360-3199

Abstract

<abstract xml:lang="en" abstract-type="author" id="abs0010"> <title id="sectitle0010">Abstract</title> <sec> <p id="abspara0010">Hydrogen production from model bio-syngas with high content of CO₂ through water-gas shift reaction (WGSR) was investigated by a fixed-bed reactor. The model bio-syngas was determined from actual biomass gasification system. To enhance the yield of hydrogen, the Fe–Cr and Cu–Zn commercial catalysts were tested respectively under the presence of 0–30 vol.% and 37 vol.% CO₂. The impacts of space velocity, reaction temperature, and H₂O/CO ratio were investigated. Under high CO₂ concentration, Fe–Cr and Cu–Zn catalysts were proved suitable for bio-syngas WGSR. The relatively improving efficiency (RIE) suggests that reactant gas with more than 20% CO₂ favors space velocity lower than 2500 h⁻¹. The extreme value of H₂ increase is observed at consistent 450 °C, which is not affected by the increase of CO₂. By lowering the space velocity of WGSR, the CO outlet can reach as low as 0.63 vol.% (6300 ppm), and 90.73% CO conversion is accomplished even with 37 vol.% CO₂.</p> </sec> </abstract>