Single-Stage Pressure Swing Adsorption for Producing Fuel Cell Grade Hydrogen
authors Relvas, F; Whitley, RD; Silva, C; Mendes, A
nationality International
journal INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
keywords ACTIVATED CARBON; CO ADSORPTION; ADSORBENT; PSA; MONOXIDE; WATER; BED; H-2; CH4; PURIFICATION
abstract High-purity hydrogen is needed for the growing market of hydrogen-based technologies, in particular for the automotive industry. Thus, efforts are needed to enhance the PSA performance to fulfill the needs of this emerging market. In the present work, a selective adsorbent for carbon monoxide was developed from a commercial activated carbon by wet impregnation of CuCl2 center dot 2H(2)O. Several samples were prepared and characterized concerning adsorption isotherms for H-2, CO2, CH4, and CO. The CO capacity was increased from 0.35 mol kg(ads)(-1) in the commercial sample to 1.25 mol kg(ads)(-1) in Cu-AC-2, at 40 degrees C and 1 bar. To attest the Cu-AC-2 performance, fixed-bed experiments were conducted namely mono- and multicomponent breakthrough. Finally, the adsorbent was tested in a 4-column lab-scale PSA unit for purifying a synthetic reformate mixture of 70% H-2, 25% CO2, 4% CH4, and 1% CO. After optimization, hydrogen with a purity +99.97% was obtained with a CO content of 0.17 ppm at a recovery of 76.2%. Such results meet the requirements for automotive industry regarding CO impurities.
publisher AMER CHEMICAL SOC
issn 0888-5885
year published 2018
volume 57
issue 14
beginning page 5106
ending page 5118
digital object identifier (doi) 10.1021/acs.iecr.7b05410
web of science category Engineering, Chemical
subject category Engineering
unique article identifier WOS:000430155700035
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journal impact factor 3.141
5 year journal impact factor 3.284
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