02180nas a2200241   4500008004100000022001400041245016900055210006900224260007300293300001200366490000600378520124700384653001701631653002801648653001201676653002201688653001701710653001101727100002601738700002401764700002601788856012401814       2007                        eng d  a1566-736700aOxy-methane reforming over high temperature stable NiCoMgCeOx and NiCoMgOx supported on zirconia-haffnia catalysts: accelerated sulfur deactivation and regeneration0 aOxymethane reforming over high temperature stable NiCoMgCeOx and  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a561-5640 v83 a<p>NiCoMgOx and NiCoMgCeOx on commercial low surface area zirconia-haffnia catalysts have unusually high thermal stability (&gt;= 2000 degrees C) for syngas generation via the methane partial oxidation process (J. Catal., 233, 36, 2005). Herein we report the results on accelerated sulfur deactivation (0.74 mol% sulfur in feed) and corresponding regeneration (at 800 degrees C in 1:1 O-2 + N-2 flow) over these catalysts. The NiCoMgCeOx catalyst, due to a larger mobility of lattice oxygen, showed a considerably higher resistance to sulfur poisoning; the higher mobility of the lattice oxygen in case of the NiCoMgCeOx catalyst may be related to the presence of CeO2. During the deactivation process, the selectivity for H-2 was decreased to a much greater extent than that for CO. Regeneration studies showed that even after complete deactivation of the catalysts, the original activity/selectivity of both the catalysts could be completely restored after a simple regeneration process. Based on their exceptionally high thermal stability, high activity/selectivity and easily regenerability, the NiCoMOx, and NiCoMgCeOx catalysts appear to be very promising candidates for the CPOM process. (c) 2006 Elsevier B.V. All rights reserved.</p>10aDeactivation10ahigh temperature stable10amethane10aPartial oxidation10aRegeneration10aSulfur1 aChoudhary, Vasant, R.1 aMondal, Kartick, C.1 aChoudhary, Tushar, V.  uhttps://library.ncl.res.in/content/oxy-methane-reforming-over-high-temperature-stable-nicomgceox-and-nicomgox-supported01796nas a2200229   4500008004100000022001400041245011900055210006900174260007300243300001200316490000800328520098000336653001501316653001701331653001301348653001301361653001301374653001701387100001901404700001701423856012601440       2009                        eng d  a0304-389400aDefluoridation of water using as-synthesized Zn/Al/Cl anionic clay adsorbent: equilibrium and regeneration studies0 aDefluoridation of water using assynthesized ZnAlCl anionic clay   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG  a873-8780 v1673 a<p>Zn/Al/Cl anionic clay has been synthesized by co-precipitation method and applied for adsorption of fluoride in aqueous medium. Equilibrium adsorption data were fitted to Langmuir, Freundlich, Temkin, and Generalized isotherm equations. Thermodynamic parameters like Delta G and Delta H values show the feasibility and exothermic nature of the adsorption process. Influence of solution pH and presence of other anions on fluoride adsorption by the clay has also been studied. Presence of carbonate in water was found to have an adverse effect on fluoride adsorption by the clay. pH(pzc) of the clay has been found to be 8.97. A two-step 1st order kinetic model was used to explain the fluoride adsorption kinetics of the as-synthesized clay. It was possible to regenerate the adsorbent with an aqueous solution of 0.01 M NaOH and the effect of regeneration on fluoride adsorption was reported up to five regeneration cycles. (C) 2009 Elsevier B.V. All rights reserved.</p>10aAdsorption10aAnionic clay10aFluoride10aIsotherm10akinetics10aRegeneration1 aMandal, Sujata1 aMayadevi, S.  uhttps://library.ncl.res.in/content/defluoridation-water-using-synthesized-znalcl-anionic-clay-adsorbent-equilibrium-and-001602nas a2200277   4500008004100000022001400041245011400055210006900169260000800238300001100246490000700257520070400264653002300968653001900991653001701010653001701027653001201044100001801056700002801074700002101102700001801123700001601141700001701157700002301174856012701197       2022                        eng d  a2213-292900aProcess development for detoxification of corncob hydrolysate using activated charcoal for xylitol production0 aProcess development for detoxification of corncob hydrolysate us  cFEB  a1070970 v103 aThe work describes process development for detoxification of corncob hydrolysate using activated carbon for microbial xylitol production. Activated carbon was used as an adsorbent to completely remove the major fermentation inhibitors obtained during dilute acid and steam explosion of biomass. A xylitol yield of 0.78 g/g was achieved from the detoxified hydrolysate in a 5 L fermenter by Pichia caribbica. The spent carbon was effectively regenerated and used for three consecutive cycles of operation. The successive regeneration and reuse of carbon could reduce the operational cost by similar to 38% and be used as a reference dataset for process scale-up and cost-effective xylitol production.10aActivated charcoal10aDetoxification10aFermentation10aRegeneration10axylitol1 aAhuja, Vishal1 aKshirsagar, Siddheshwar1 aGhosh, Prasenjit1 aSarkar, Bipul1 aSutar, Ajit1 aMore, Snehal1 aDasgupta, Diptarka  uhttps://library.ncl.res.in/content/process-development-detoxification-corncob-hydrolysate-using-activated-charcoal-xylitol