01942nas a2200229   4500008004100000022001400041245012600055210006900181260000800250300001100258490000800269520113200277653001701409653002301426653002901449653002401478100002201502700002201524700002101546700001801567856012701585       2022                        eng d  a2468-823100aEffect of B site substitution in Gd2B2-xNiyO7-delta (B= Ti, Zr) ternary metal oxide catalysts in dry reforming of methane0 aEffect of B site substitution in Gd2B2xNiyO7delta B Ti Zr ternar  cAPR  a1122420 v5223 a<p>
	Structured catalysts are emerging as active and durable catalysts in dry reforming of methane due to their inherent characteristics like lattice insertion of active metals and consequent stability imparted. Here we report Ti and Zr substituted Gd2B2-xNiyO7-delta (B = Ti, Zr) catalysts synthesized by citrate gel method, which are characterized and tested for dry reforming of methane. Structure and Ni substitution has been confirmed by Rietveld refinement of powder XRD patterns and Raman analysis. TPR and CO2-TPD were performed to analyze the reducibility and effect of basic sites of catalysts in DRM activity. Ni doped Ti analogue shows stable and superior activity towards dry reforming of methane for 100 h. The in situ IR studies and XPS analysis confirmed the presence of surface hydroxyl species in this catalyst, which triggers the activation of CO2 and provides higher and durable activity in dry reforming reaction. Absence of any C formation in this catalyst after durability test indicates the mechanism of C gasification by the surface hydroxyl species enhancing stable activity for long durations.</p>
10aA(2)B(2)O(7)10aCitrate gel method10aDry reforming of methane10aTernary metal oxide1 aGhodke, Seema, R.1 aThundiyil, Shibin1 aDongapure, Pavan1 aDevi, Nandini  uhttps://library.ncl.res.in/content/effect-b-site-substitution-gd2b2-xniyo7-delta-b-ti-zr-ternary-metal-oxide-catalysts-dry02183nas a2200241   4500008004100000022001400041245011100055210006900166260000800235300001000243490000800253520135800261653001901619653001801638653002501656653002201681653001301703100002601716700002101742700002301763700002901786856012601815       2024                        eng d  a0263-876200aExperimental and kinetic modelling studies for the design of fixed bed methanol reactor over CuZA catalyst0 aExperimental and kinetic modelling studies for the design of fix  cMAY  a79-900 v2053 a<p>
	Direct conversion of CO 2 via hydrogenation to value-added chemicals is a vital approach for utilising CO 2 emitted into the atmosphere. In this paper, a critical analysis of reaction kinetic modelling studies is explored in a fixed bed reactor to improve methanol yield for different H 2 to CO 2 ratios by simulating a lab-scale reactor for adiabatic and isothermal conditions. The feed inlet temperature and pressure variations are applied to study the effect of both configurations on methanol production. The results show that the isothermal configuration yields 2.76% more methanol yield compared to the adiabatic reactor. The effect of H 2 to CO 2 molar ratios of 3, 6 and 9 on the performance of the catalyst and the influence of CO and CO 2 hydrogenation is investigated with model simulations. The overall methanol yield is increased from 19.03% to 36.41% with increase in H 2 to CO 2 molar ratio from 3 to 9. Experiments are performed using commercial copper-based catalyst for different temperatures of 210, 230 and 250 degrees C at a pressure of 40 bar for H 2 /CO 2 of 3 and GHSV of 720 h -1 as well as at optimal temperature of 250 degrees C and 50 bar with varying H 2 /CO 2 of 3, 6, 9 for 3 g and 6 g catalyst. The maximum methanol yield of 2.53% and space time yield of 13.59 mg/g cat .h is obtained at H 2 /CO 2 ratio of 9.</p>
10aCO2 conversion10aCuZA catalyst10aH2 toCO2 molar ratio10aKinetic modelling10aMethanol1 aBagwan, Farahanaz, M.1 aDongapure, Pavan1 aKulkarni, Amol, A.1 aVasireddy, Satyam, Naidu  uhttps://library.ncl.res.in/content/experimental-and-kinetic-modelling-studies-design-fixed-bed-methanol-reactor-over-cuza