title: Efficient method for the conversion of agricultural waste into sugar alcohols over supported bimetallic catalysts.
abstract: Promoter effect of Sn in the PtSn/γ-Al2O3 (AL) and PtSn/C bimetallic catalysts is studied for the conversion of variety of substrates such as, C5 sugars (xylose, arabinose), C6 sugars (glucose, fructose, galactose), hemicelluloses (xylan, arabinogalactan), inulin and agricultural wastes (bagasse, rice husk, wheat straw) into sugar alcohols (sorbitol, mannitol, xylitol, arabitol, galactitol). In all the reactions, PtSn/AL showed enhanced yields of sugar alcohols by 1.5-3 times than Pt/AL. Compared to C, AL supported bimetallic catalysts showed prominent enhancement in the yields of sugar alcohols. Bimetallic catalysts characterized by X-ray diffraction study revealed the stability of catalyst and absence of alloy formation thereby indicating that Pt and Sn are present as individual particles in PtSn/AL. The TEM analysis also confirmed stability of the catalysts and XPS study disclosed formation of electron deficient Sn species which helps in polarizing carbonyl bond to achieve enhanced hydrogenation activity.
authors.affiliation: Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India.
authors.forename: Anup P
authors.initials: AP
authors.lastname: Tathod
authors.affiliation: Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India. Electronic address: pl.dhepe@ncl.res.in.
authors.forename: Paresh L
authors.initials: PL
authors.lastname: Dhepe
mesh_terms: D000383:Agriculture; D000438:Alcohols / Q000737:chemistry*; D001089:Arabinose / Q000737:chemistry; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D005632:Fructose / Q000737:chemistry; D005685:Galactans / Q000737:chemistry; D004376:Galactitol / Q000737:chemistry; D005690:Galactose / Q000737:chemistry; D005947:Glucose / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry; D007444:Inulin / Q000737:chemistry; D008353:Mannitol / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D010984:Platinum / Q000737:chemistry; D013012:Sorbitol / Q000737:chemistry; D013402:Sugar Alcohols / Q000737:chemistry; D013696:Temperature; D014001:Tin / Q000737:chemistry; D014908:Triticum; D014866:Waste Products; D014961:X-Ray Diffraction; D014990:Xylans / Q000737:chemistry; D014993:Xylitol / Q000737:chemistry; D014994:Xylose / Q000737:chemistry
chemical_list: D000438:Alcohols; D005685:Galactans; D013402:Sugar Alcohols; D014866:Waste Products; D014990:Xylans; D004376:Galactitol; D005632:Fructose; D008353:Mannitol; D010984:Platinum; D013012:Sorbitol; D014001:Tin; D002244:Carbon; D006859:Hydrogen; D007444:Inulin; D014994:Xylose; D001089:Arabinose; D005947:Glucose; C005653:arabinogalactan; D014993:Xylitol; D005690:Galactose; C014999:arabitol
keywords: Agricultural waste; Bimetallic catalyst; Hydrogenation; Monosaccharides; Polysaccharides