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Sodium nitrate (NaNO 3 ) and other alkali nitrates are known to accelerate the CO 2 11 absorption rate of MgO above their melting points. This absorption rate is further enhanced if 12 absorption is done after partial desorption. Moreover it does not show any induction period 13 which is otherwise present if absorption is done after complete desorption. A thorough study of 14 various factors affecting the rate after partial desorption is done in this work. We exposed a 15 sample to CO 2 for several different periods before partial desorption and exposed to N 2 for 16 several different periods during partial desorption in a thermogravimetric analyzer. Absorbents 17 were also characterized by XRD, BET and SEM and studied in in-situ IR cell to understand the 18

Ru(II) Phenanthroline [Ru(II)(Phen) n where n ) 1,2,3] complexes were used as highly chemoselective catalysts for hydrogenation of nitro aryls using molecular hydrogen in an aqueous media. Water, universal solvent, was used as a reaction mixture for hydrogenation of nitro-aryls to make the process green. The chemoselectivity in hydrogenation of substituted nitrobenzene to substituted aniline was obtained as high as >99% at about complete conversion of substituted nitrobenzene. The parametric effects, including effect of solvent, effect of ligand, effect of metal to ligand ratio, effect of temperature and pressure, were studied in detail to obtain the best results. The Ru(Phen)n was characterized by FTIR, UV-vis, and XPS.