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Insight into steam reforming of ethanol to produce hydrogen for fuel cells [An article from: Chemical Engineering Journal]
Book Details
Author(s)P.D. Vaidya, A.E. Rodrigues
PublisherElsevier
ISBN / ASINB000RR83R8
ISBN-13978B000RR83R5
AvailabilityAvailable for download now
Sales Rank12,058,356
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Chemical Engineering Journal, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Ethanol can be prepared from agricultural residues and hence is a renewable resource. Its production is simple and cheap and hence steam reforming of ethanol to produce hydrogen for fuel cells is attractive. Process engineering aspects of ethanol steam reforming are discussed here. High temperatures, low pressures and high water-to-ethanol ratios in the feed favor hydrogen production. Ni, Co, Ni/Cu and noble metal (Pd, Pt, Rh)-supported catalysts are promising. Major concerns are fast catalyst coking and formation of by-products such as methane, diethyl ether and acetaldehyde. To overcome these problems, the process should be carried out in a two-layer fixed bed catalytic reactor: at first, ethanol should be dehydrogenated to acetaldehyde in presence of Cu-based catalyst at 573-673K and then this stream should be passed over a bed containing a mixture of Ni-based catalyst and a chemisorbent at low temperatures around 723K. The entire process of ethanol steam reforming coupled with selective CO"2 removal by chemisorption will enable production of high-purity H"2 and hence is very promising.
Description:
Ethanol can be prepared from agricultural residues and hence is a renewable resource. Its production is simple and cheap and hence steam reforming of ethanol to produce hydrogen for fuel cells is attractive. Process engineering aspects of ethanol steam reforming are discussed here. High temperatures, low pressures and high water-to-ethanol ratios in the feed favor hydrogen production. Ni, Co, Ni/Cu and noble metal (Pd, Pt, Rh)-supported catalysts are promising. Major concerns are fast catalyst coking and formation of by-products such as methane, diethyl ether and acetaldehyde. To overcome these problems, the process should be carried out in a two-layer fixed bed catalytic reactor: at first, ethanol should be dehydrogenated to acetaldehyde in presence of Cu-based catalyst at 573-673K and then this stream should be passed over a bed containing a mixture of Ni-based catalyst and a chemisorbent at low temperatures around 723K. The entire process of ethanol steam reforming coupled with selective CO"2 removal by chemisorption will enable production of high-purity H"2 and hence is very promising.
