02058nas a2200241   4500008004100000022001400041245009300055210006900148260009900217300001200316490000800328520118700336653002701523653002201550653001301572653001501585653001601600100001901616700001901635700001901654700001901673856012401692       2013                        eng d  a0016-236100aInfluence of contact medium and surfactants on carbon dioxide clathrate hydrate kinetics0 aInfluence of contact medium and surfactants on carbon dioxide cl  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcMAR  a664-6710 v1053 a<p>Carbon dioxide (CO2) hydrate formation kinetic was investigated in a fixed bed crystallizer at constant pressure (3.55 MPa) and temperature (274 K). Porous media of three different silica gels were used, with a mesh size of 60-120, 100-200 and 230-400 having different surface area. The observed trends indicate that silica gel with larger surface area leads to higher gas consumption as well as reduces the induction time. The effect of pore diameter and particle size distribution has already been reported in a previous study [1]. In this study the effect of additives on hydrate formation kinetics were also investigated. The additives studied were nonionic surfactant Tween-80 (T-80), cationic dodecyltrimethylammonium chloride (DTACl) and anionic Sodium Dodecyl Sulphate (SDS). Out of the three surfactants used in this study, SDS was found to be most effective in enhancing the rate of hydrate formation as well as reducing the induction time. The current result shows significant improvement in water to hydrate conversion in silica gel media compared to quiescent water or surfactant-water system under similar conditions. (C) 2012 Elsevier Ltd. All rights reserved.</p>10aCarbon dioxide capture10aClathrate hydrate10akinetics10aSilica gel10aSurfactants1 aKumar, Asheesh1 aSakpal, Tushar1 aLinga, Praveen1 aKumar, Rajnish  uhttps://library.ncl.res.in/content/influence-contact-medium-and-surfactants-carbon-dioxide-clathrate-hydrate-kinetics-001845nas a2200229   4500008004100000022001400041245011200055210006900167260007700236300001200313490000600325520102600331653001501357653001301372653001501385653001301400653002401413100001901437700001901456700001901475856012101494       2015                        eng d  a2194-428800aInfluence of low-dosage hydrate inhibitors on methane clathrate hydrate formation and dissociation kinetics0 aInfluence of lowdosage hydrate inhibitors on methane clathrate h  aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcJUL  a717-7250 v33 a<p>This work investigates the effect of low-dosage hydrate inhibitors (LDHIs) on methane hydrate formation and dissociation. The hydrate inhibitors used in this study were the sodium salt of polyacrylic acid, a polysaccharide chitosan, and the linear sulfated polysaccharide i-carrageenan; the inhibiting behavior of these additives were compared with that of the commonly used hydrate inhibitor polyvinylpyrrolidone for methane hydrate formation. A LDHI concentration of 1wt% was found to increase the induction time relative to that at a LDHI concentration of 0.1wt%. Chitosan was found to be better than the others in reducing nucleation and the growth rate of the hydrate at a concentration of 1wt%. At a lower concentration of 0.1wt%, nucleation inhibition was minimal, however, growth inhibition was significant. The effect of these inhibitors on the decomposition rate of the hydrate was also studied, and the decomposition kinetics at a constant driving force in excess of three-phase equilibrium is reported.</p>10agas uptake10ahydrates10ainhibitors10akinetics10athermal stimulation1 aKumar, Asheesh1 aSakpal, Tushar1 aKumar, Rajnish  uhttps://library.ncl.res.in/content/influence-low-dosage-hydrate-inhibitors-methane-clathrate-hydrate-formation-and-0