02326nas a2200217   4500008004100000022001400041245015700055210006900212260007300281300001000354490000700364520144400371653002601815653002801841653001301869653001501882100002001897700002601917700003301943856013201976       2008                        eng d  a0926-337300aCu-Ce mixed oxides supported on Al-pillared clay: effect of method of preparation on catalytic activity in the preferential oxidation of carbon monoxide0 aCuCe mixed oxides supported on Alpillared clay effect of method   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcOCT  a21-290 v843 a<p>The possibility of using Al-pillared montmorillonite (Al-PILC) clay as a high-surface-area support for CuO-CeO2-based catalysts has been investigated. The preparation of the samples was done by three different methods, viz., amorphous citrate route (ACR), deposition precipitation (DP) and wet impregnation method (WIM). Samples with different CuO-CeO2 loadings (10-50 wt.%) were prepared by each of the three methods. The catalytic activity of these samples was investigated for the preferential oxidation (PROX) of carbon monoxide (CO) in excess of H-2. The samples prepared by DP and WIM methods show better activity than the samples prepared by ACR method. At low Cu content, the samples prepared by DP method have a slight edge over samples prepared by WIM method. The DP-30 sample shows a very high CO conversion of 96.1% at 423 K. A higher dispersion of CuO-CeO2 on pillared montmorillonite clay and better reducibility of copper oxide species may be responsible for the good activity of these samples even at lower reaction temperatures. A higher O-2/CO ratio increased the CO conversion but led to a reduction in oxidation selectivity. No methanation of CO or CO2 was observed at the reaction temperature. These CuO-CeO2/Al-PILC samples could be considered as comparable in performance with supported noble metal catalysts for the preferential oxidation of CO in excess hydrogen. (c) 2008 Elsevier B.V. All rights reserved.</p>10aAlumina-pillared clay10aClay-supported CuO-CeO210aCuO-CeO210aPROX of CO1 aRamaswamy, Veda1 aMalwadkar, Sachin, S.1 aChilukuri, Satyanarayana, V.  uhttps://library.ncl.res.in/content/cu-ce-mixed-oxides-supported-al-pillared-clay-effect-method-preparation-catalytic-activity-002011nas a2200253   4500008004100000022001400041245010600055210006900161260011700230300001000347490000800357520107000365653001001435653001801445653001901463653002101482653001101503653002001514100001601534700002501550700001701575700003301592856013201625       2009                        eng d  a0920-586100aCopper-based catalysts for water gas shift reaction: influence of support on their catalytic activity0 aCopperbased catalysts for water gas shift reaction influence of   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbCatalysis Soc India; Petrotech Soc; Indo US Sci & Technol ForumcMAR  a72-760 v1413 a<p>Three copper containing catalysts supported on ceria and mixed oxides of ceria with zirconia and titania were prepared by co-precipitation method and their catalytic activity was tested for water gas shift (WGS) reaction. High surface area (&gt;100m(2)/g) mixed oxides were obtained following the present method of preparation. The catalysts were characterized by XRD, H(2)-temperature programmed reduction (TPR), UV-vis and XPS. Catalytic activity was evaluated for water gas shift reaction in the 200-400 degrees C temperature range, The gas hourly space velocity was varied from 5000 to 25,000h(-1) for better evaluation and comparison of their performance. The effect of CO(2) in the feed gas mixture on the WGS activity of these catalysts was also studied. Among the three catalysts studied, CuO-CeO(2)-ZrO(2) mixed oxide shows better activity, implying the influence of support. Characterization of the catalysts after WGS reaction was also carried out in order to investigate structure-property correlation. (c) 2008 Elsevier B.V. All rights reserved.</p>10aceria10aCeria-titania10aCeria-zirconia10aCo-precipitation10aCopper10aWater gas shift1 aPradhan, S.1 aReddy, Satyanarayana1 aDevi, R., N.1 aChilukuri, Satyanarayana, V.  uhttps://library.ncl.res.in/content/copper-based-catalysts-water-gas-shift-reaction-influence-support-their-catalytic-activity-002322nas a2200313   4500008004100000022001400041245010700055210006900162260011000231300001400341490000700355520118000362653002901542653001401571653002301585653002001608653001801628653002201646653001601668653002801684653003001712653002301742653001101765100002301776700001801799700002701817700003301844856013101877       2012                        eng d  a0376-471000aCarbon dioxide reforming of methane over ruthenium substituted strontium titanate perovskite catalysts0 aCarbon dioxide reforming of methane over ruthenium substituted s  aDR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATION-NISCAIRcSEP  a1339-13470 v513 a<p>Strontium titanate (SrTiO3) doped with varying amounts of ruthenium (7.9, 15.6 and 31 wt%) have been prepared by the citrate gel synthesis method. Structural and textural characterizations reveal that at lower concentrations, a major part of Ru is incorporated in the lattice of SiTiO3. The content of surface Ru (outside lattice) increases with increasing amounts of the doped Ru. The surface Ru reduced at lower temperatures compared to Ru incorporated into the lattice. The reduction of the lattice substituted Ru occurs only at temperatures above the collapse of the perovskite structure. The catalyst sample with 7.9 wt% of Ru shows good conversions in the dry reforming of methane with CO2. The conversion of CO2 is in excess compared to methane under the studied reaction conditions. As a result, H-2/CO ratio of the product gases which should have been equivalent to unity is lower than the stoichiometric value. This ratio is particularly low when lower reaction temperatures (873-973 K) were used. Similar was the case when high space velocities were used. Low methane conversion and reverse water gas shift reaction are the causes for the low H-2/CO ratios.</p>10aCarbon dioxide reforming10aCatalysts10aCitrate gel method10aDoped catalysts10aDry reforming10aMethane reforming10aPerovskites10aReverse water gas shift10aRuthenium doped catalysts10aStrontium titanate10aSyngas1 aGurav, Hanmant, R.1 aBobade, Richa1 aDas, Vineetha, Lakshmi1 aChilukuri, Satyanarayana, V.  uhttps://library.ncl.res.in/content/carbon-dioxide-reforming-methane-over-ruthenium-substituted-strontium-titanate-perovskite-002005nas a2200193   4500008004100000022001400041245007000055210006900125260011000194300001400304490000600318520126000324100002101584700002101605700003201626700001901658700003301677856010101710       2012                        eng d  a2044-475300aConversion of cellulose to polyols over promoted nickel catalysts0 aConversion of cellulose to polyols over promoted nickel catalyst  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a1852-18580 v23 a<p>Sorbitol is one of the key platform chemicals that can be applied to several industrial applications, including bio-fuels and hydrogen production. Presently there is no commercial heterogeneous catalytic process to produce sorbitol from cellulose due to the low yield and high cost of noble metals required for the conversion. In this paper we describe an aqueous phase hydrolysis-hydrogenation process to convert cellulose to sorbitol using a cheap Ni based catalyst. Monometallic Ni catalysts showed little activity for the reaction, but with the addition of a small amount of Pt to the Ni catalyst (Ni : Pt = 22 : 1 atom ratio), the activity was greatly enhanced. Results showed that the bimetallic Ni-Pt catalysts supported on mesoporous alumina gave a hexitol (sorbitol + mannitol) yield of 32.4% compared to only 5% with a Ni catalyst. Moreover, Ni-Pt supported on a mesoporous beta zeolite support provided even higher yield of 36.6%. These results were obtained after only 6 hours of run at 200 degrees C and 50 bar H-2 pressure (at room temperature). The presence of a small amount of Pt promotes the protonation of water and hydrogen molecules, which spill over to Ni sites creating in situ acid sites to catalyse hydrolysis of cellulose.</p>1 aShrotri, Abhijit1 aTanksale, Akshat1 aBeltramini, Jorge, Norberto1 aGurav, Hanmant1 aChilukuri, Satyanarayana, V.  uhttps://library.ncl.res.in/content/conversion-cellulose-polyols-over-promoted-nickel-catalysts-0