title: Hydrogen production from steam reforming of acetic acid over Cu-Zn supported calcium aluminate.
abstract: Hydrogen can be produced by catalytic steam reforming (CSR) of biomass-derived oil. Typically bio oil contains 12-14% acetic acid; therefore, this acid was chosen as model compound for reforming of biooil with the help of a Cu-Zn/Ca-Al catalyst for high yield of H(2) with low CH(4) and CO content. Calcium aluminate support was prepared by solid-solid reaction at 1350°C. X-ray diffraction indicates 12CaO·7Al(2)O(3) as major, CaA(l4)O(7) and Ca(5)A(l6)O(14) as minor phases. Cu and Zn were loaded onto the support by wet-impregnation at 10 and 1wt.%, respectively. The catalysts were characterized by Brunauer-Emmett-Teller (BET), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy TEM and the surface area for both support and Cu-Zn were 10.5 and 5.8m(2)/g, respectively. CSR was carried out in a tubular fixed bed reactor (I.D.=19mm) at temperatures between 600 and 800°C with 3-g loadings and (H(2)O/acetic acid) wt. ratio of 9:1. Significantly high (80%) yield of hydrogen was obtained over Cu-Zn/Ca-Al catalyst, as incorporation of Zn enhanced the H(2) yield by reducing deactivation of the catalyst. The coke formation on the support (Ca-12/Al-7) surface was negligible due to the presence of excess oxygen in the 12CaO·7Al(2)O(3) phase.
authors.affiliation: Department of Chemical Engineering, Indian Institute of Technology, New Delhi 110016, India. pravakar.mohanty@gmail.com
authors.forename: Pravakar
authors.initials: P
authors.lastname: Mohanty
authors.forename: Madhumita
authors.initials: M
authors.lastname: Patel
authors.forename: Kamal K
authors.initials: KK
authors.lastname: Pant
mesh_terms: D019342:Acetic Acid / Q000737:chemistry*; D017607:Aluminum Compounds / Q000737:chemistry*; D001709:Biotechnology / Q000379:methods*; D017610:Calcium Compounds / Q000737:chemistry*; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D006859:Hydrogen / Q000378:metabolism*; D010316:Particle Size; D013227:Steam; D013696:Temperature; D013997:Time Factors; D014961:X-Ray Diffraction; D015032:Zinc / Q000737:chemistry*
chemical_list: D017607:Aluminum Compounds; D017610:Calcium Compounds; D013227:Steam; C035219:calcium aluminate; D003300:Copper; D006859:Hydrogen; D015032:Zinc; D019342:Acetic Acid