01884nas a2200253   4500008004100000022001400041245009800055210006900153260011000222300001000332490000700342520096700349653001701316653001601333653002001349653002201369653001401391100002201405700002501427700001901452700001501471700001801486856012601504       2010                        eng d  a0971-457X00aGas-phase oxidant-free oxidation of cyclohexanol over V2O5-MoO3-M2O (M = Na, K, Cs) catalysts0 aGasphase oxidantfree oxidation of cyclohexanol over V2O5MoO3M2O   aDR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATION-NISCAIRcJAN  a43-490 v173 a<p>Oxidant-free oxidation (dehydrogenation) of cyclohexanol is carried out in a down-flow integral laboratory scale reactor using different alkali doped catalysts. The effect of reaction temperature, contact time (W/F) and doping of alkali metals is studied to check its effect on nature of prominent products of the reaction (cyclohexanone and cyclohexene). At lower temperature the cyclohexanone prevails whereas at higher temperature cyclohexene is observed in prominence. Acid-modified catalysts (with boron and phosphorous) facilitated cyclohexene selectivity whereas alkali modified catalysts facilitated cyclohexanone selectivity. Calcination of sodium modified catalyst at different temperatures under static condition affect characteristic phase intensity and cyclohexanone selectivity. XRD investigation showed formation of different inorganic phases as the characteristic of dopant. Cesium modified catalyst showed better dehydrogenation activity.</p>10aCyclohexanol10adehydration10aDehydrogenation10aElectronegativity10aV2O5-MoO31 aVyawahare, Y., K.1 aChumbhale, Vilas, R.1 aPardhy, S., A.1 aSamuel, V.1 aAswar, A., S.  uhttps://library.ncl.res.in/content/gas-phase-oxidant-free-oxidation-cyclohexanol-over-v2o5-moo3-m2o-m-na-k-cs-catalysts-002181nas a2200241   4500008004100000022001400041245008200055210006900137260000800206300001600214490000700230520143400237653002001671653001001691653000901701653002801710653001101738653001501749100001501764700002101779700002701800856011201827       2022                        eng d  a0360-319900aOptimization of Liquid Organic Hydrogen Carrier (LOHC) dehydrogenation system0 aOptimization of Liquid Organic Hydrogen Carrier LOHC dehydrogena  cAUG  a28530-285470 v473 a<p>
	In this paper, the perhydrodibenzyltoluene dehydrogenation flowsheet has been simulated. Modelling of the dehydrogenation reactor has been performed using the 1-D model. External and internal mass transfer resistances are also considered. Non-isothermal pellet condition has been considered for simulating the dehydrogenation reactor. The flowsheet simulation has been carried out in DW-Sim v 6.5.2 integrated with the reactor model coded in Python. NET. The dehydrogenation reactor is operated at a feed temperature between 523 K -613 K, a wall temperature of 623 K and 653 K, and a reactor pressure maintained at 1.2 atm. The amount of catalyst required for the perhydrodibenzyltoluene (PDBT) dehy-drogenation reactor is evaluated such that the conversion reaches 99%. The process flowsheet has been simulated to produce 10 Nm(3)/hr of industrial-grade hydrogen. The effects of feed temperature, wall temperature, and hydrogen burner efficiency on various system requirements, including catalyst weight, energy supplied to the dehydrogenation reactor, areas of the heat exchanger, and hydrogen production from the reactor, have been discussed. Preliminary cost optimization based on the heat exchangers and catalyst at various feed temperatures, reactor wall temperature, and hydrogen burner efficiency has been carried out. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.</p>
10aDehydrogenation10aDWSim10aLOHC10aPerhydrodibenzyltoluene10aPython10asimulation1 aRao, Nihal1 aLele, Ashish, K.1 aPatwardhan, Ashwin, W.  uhttps://library.ncl.res.in/content/optimization-liquid-organic-hydrogen-carrier-lohc-dehydrogenation-system01389nas a2200289   4500008004100000022001400041245011000055210006900165260000800234300001200242490000700254520038300261653002700644653002700671653003300698653003300731653003500764653002000799653002900819653002600848653002900874100002400903700002200927700001400949700002000963856011600983       2022                        eng d  a0019-510300aThallium(III) p-tosylate (TTS) mediated oxidative rearrangement of 2-naphthyl and 2-heteroarylchromanones0 aThalliumIII ptosylate TTS mediated oxidative rearrangement of 2n  cSEP  a923-9270 v613 a<p>
	A practical and effective approach towards the synthesis of 3-hetroaryl-4H-chromen-4-ones by the oxidative rearrangement of the respective 2-hetroaryl chroman-4-ones using thallium(III) p-tosylate is described. The oxidative rearrangement of alpha and beta-naphthyl and thiophene behave like aryl groups. However, pyridyl groups give only the dehydrogenated product.</p>
10a2-(3-pyridyl)chromones10a2-(4-pyridyl)chromones10a2-and 3-(2-theinyl)chromones10a2-and 3-(3-theinyl)chromones10a2-and 3-(?-naphthyl) chromones10aDehydrogenation10aOxidative rearrangements10athallium(III) acetate10athallium(III) p-tosylate1 aKurapati, Chidvilas1 aMuthukrishnan, M.1 aSingh, Om1 aGundla, Rambabu  uhttps://library.ncl.res.in/content/thalliumiii-p-tosylate-tts-mediated-oxidative-rearrangement-2-naphthyl-and-201883nas a2200253   4500008004100000022001400041245010100055210006900156260000800225300001100233490000700244520100500251653002901256653003001285653002001315653002301335653002201358653002701380100002601407700002401433700002101457700002901478856012201507       2026                        eng d  a0930-751600aReaction kinetics for dehydrogenation of decahydroquinoline to quinoline for hydrogen generation0 aReaction kinetics for dehydrogenation of decahydroquinoline to q  cFEB  ae701770 v493 a<p>
	Catalytic dehydrogenation of decahydroquinoline (DHQ) to quinoline is a promising pathway for hydrogen release in liquid organic hydrogen carrier systems. In this work, solvent-free DHQ dehydrogenation over Pd/Al2O3 is systematically investigated to evaluate hydrogen release performance and reaction kinetics. High DHQ conversion (83.9%) and degree of dehydrogenation (82.7%) are achieved at optimal reaction conditions. A power-law kinetic model based on a simplified reaction mechanism is developed and simulated using a Markov Chain Monte Carlo (MCMC) approach for estimation of rate constants and validation of concentration profiles with experimental data. The apparent activation energies are determined to be 45.85 kJ/mol for DHQ to 5,6,7,8-tetrahydroquinoline (bz-THQ) and 185.43 kJ/mol for bz-THQ to quinoline formation, identifying latter as the rate-limiting step. This framework provides mechanistic insight and supports the potential of DHQ as an efficient hydrogen carrier.</p>
10aDecahydroquinoline (DHQ)10adegree of dehydrogenation10aDehydrogenation10arate-limiting step10aReaction kinetics10aWeisz-Prater criterion1 aBagwan, Farahanaz, M.1 aDadkar, Sarthak, S.1 aKinage, Anil, K.1 aVasireddy, Satyam, Naidu  uhttps://library.ncl.res.in/content/reaction-kinetics-dehydrogenation-decahydroquinoline-quinoline-hydrogen-generation