02789nas a2200253   4500008004100000022001400041245010600055210006900161260009900230300001200329490000700341520187600348653001702224653001902241653001902260653001602279653002302295100001802318700001802336700001602354700001702370700002202387856012602409       2011                        eng d  a0972-062600aEnvironmental potential applications of alkali metal exchanged zeolite x in carbon dioxide adsorption0 aEnvironmental potential applications of alkali metal exchanged z  aSECTOR A/80 SCHEME NO 54, VIJAY NAGAR, A B ROAD, INDORE MP, 452 010, INDIAbDR JYOTI GARGcJUN  a661-6710 v153 a<p>The increasing atmospheric CO2 concentration, mainly caused by the Thermal Power Stations, Industrial sector and fossil fuel combustion, has led to consequences of global warming. Zeolitic adsorption processes is more promising, energy saving and viable method for CO2 removal in Comparison to other technologies. In order to examine the behavior and to establish the trends in carbon dioxide sorption, NaX zeolite (Si/Al = 1.15) and it's the modified forms with identical degree (55.5 +/- 2.5) of exchange by K+, Rb+ and Cs+ cations have been selected., The samples were characterized by powder XRD, Low temperature nitrogen adsorption/desorption measurements, chemical analysis and also for the intermediate electronegativity and the partial charges on the atoms using Sanderson's electronegativity equalization principle. The isotherms of carbon dioxide using these NaX, NaKX, NaRbX and NaCsX samples were measured at an interval of 30 K in the temperature range of 273 to 363 K up to 600 Torr. The uptake of CO2 was found to depend on both, the size of the nonframework cation and the temperature at which the isotherms were measured. The cations with lower charge density will have lower extent of electrostatic interaction with the sorbate molecules. Since CO2 has more linear quadrupole moment, it interacts mainly with the extra-framework cations and framework oxygen. The carbon dioxide sorption data satisfactorily represented by Langmuir and also analyzed for the chemical affinity. The Isosteric heat (q(st)) of NaX for the coverage of 20 molecules per unit cell is nearly equal to 26 kJ, mol(-1). The NaX and NaKX comparatively show a flat heat profile with the increasing amount sorbed than those of NaRbX and NaCsX indicating a balance between the strength of energetic heterogeneity of sorbate-sorbent interactions and sorbate-sorbate interactions.</p>10aCO2 sorption10aIonic exchange10aIsosteric heat10aNaX zeolite10aTheoretical models1 aJoshi, U., D.1 aJoshi, P., N.1 aRoh, H., S.1 aYoon, W., L.1 aShiralkar, V., P.  uhttps://library.ncl.res.in/content/environmental-potential-applications-alkali-metal-exchanged-zeolite-x-carbon-dioxide-001730nas a2200205   4500008004100000022001400041245008400055210006900139260007300208300001200281490000800293520097400301653001901275653001701294653002701311100002401338700002801362700002201390856011201412       2012                        eng d  a0376-738800aPolymeric ionic liquids (PILs): effect of anion variation on their CO2 sorption0 aPolymeric ionic liquids PILs effect of anion variation on their   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB  a305-3150 v3893 a<p>A series of polymeric ionic liquids (PILs) based on poly(diallyldimethylammonium chloride), P[DADMA][Cl] as a precursor was investigated by varying anions categorized into carboxylates, sulphonates and inorganic type. For the exchange of chloride from P[DADMA][Cl] by another anion, silver salt of the corresponding anion was preferred. Obtained PILs were investigated for physical properties which are anticipated to affect gas sorption. PILs possessing carboxylate (especially acetate) anion exhibited attractive CO2 sorption capacity as well as sorption selectivity over H-2 and N-2, in Comparison to Other two Categories. PIL with acetate anion, P[DADMA][Ac] possessed appreciable CO2 sorption coupled with high selectivity (S-CO2/S-N2 = 114.3). This crucial finding from this series of PILs was further substantiated by making PIL based on poly(vinylbenzyltrimethylammonium chloride), P[VBTMA][Cl] as a precursor. (C) 2011 Elsevier B.V. All rights reserved.</p>10aAnion exchange10aCO2 sorption10aPolymeric ionic liquid1 aBhavsar, Rupesh, S.1 aKumbharkar, Santosh, C.1 aKharul, Ulhas, K.  uhttps://library.ncl.res.in/content/polymeric-ionic-liquids-pils-effect-anion-variation-their-co2-sorption-002389nas a2200229   4500008004100000022001400041245012500055210006900180260007400249300000900323490000800332520150500340653004701845653001701892653003001909653001201939653002401951100001901975700001601994700002302010856012602033       2013                        eng d  a0049-697900aApplications of lithium zirconium silicate at high temperature for the carbon dioxide sorption and conversion to syn-gas0 aApplications of lithium zirconium silicate at high temperature f  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJUN  a15690 v2243 a<p>The applications of different samples of lithium zirconium silicate contributing to CO2 sorption and conversion of CO2 to syn-gas at high temperatures were investigated. Several samples of lithium zirconium silicate prepared by solid-solid fusion method were calcined in air or nitrogen atmosphere at 900 degrees C for 3 h. The lithium zirconium silicate samples were characterized by acidity/alkalinity, surface area, XRD pattern, SEM images, and CO2 sorption. The alkalinity and surface area of the samples of lithium zirconium silicate were found to be in the range of 15.1 to 20.0 mmol g(-1) and 0.05 to 2.13 m(2) g(-1), respectively. The temperature profile of CO2 sorption by samples of lithium zirconium silicate was given for the range 100 to 700 degrees C. The CO2 sorption was found to be in the range of 12.81 to 18.04 wt.% at 550 degrees C for samples of lithium zirconium silicate with different Li/Zr/Si mole ratios from 1 to 6. The crystalline phases in the samples of the lithium zirconium silicate, Li6Si2O7, ZrSiO4, Li2SiO3, Li2ZrO3, Li4ZrO4, and Li4SiO4 could contribute to CO2 capture. The conversion of CO2 by methane to syn-gas over the lithium silicate samples and PdO (5 wt.%)/Al2O3 at 500 degrees C with the gas hourly space velocities 6,000, 12,000, and 36,000 mL h(-1) g(-1) of methane and 6,000 mL h(-1) g(-1) of CO2 was explored. However, the higher conversion of CO2 to syn-gas was observed at the low gas hourly space velocity of 6,000 mL h(-1) g(-1) of methane.</p>10aApplications of lithium zirconium silicate10aCO2 sorption10aSolid-solid fusion method10aSyn-gas10aTemperature profile1 aRaskar, Reshma1 aRane, Vilas1 aGaikwad, Abaji, G.  uhttps://library.ncl.res.in/content/applications-lithium-zirconium-silicate-high-temperature-carbon-dioxide-sorption-and-0