01905nas a2200217   4500008004100000022001400041245011100055210006900166260010200235300001200337490000800349520106200357653002401419653001001443653002001453653002301473653002801496100002101524700002101545856012101566       2016                        eng d  a0974-362600aDirect synthesis of dimethyl carbonate from CO2 and methanol over CeO2 catalysts of different morphologies0 aDirect synthesis of dimethyl carbonate from CO2 and methanol ove  aC V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIAbINDIAN ACAD SCIENCEScJUN  a957-9650 v1283 a<p>The direct synthesis of dimethyl carbonate (DMC) from carbon dioxide (CO2) and methanol is an attractive approach towards conversion of the greenhouse gas - CO2 into value-added chemicals and fuels. Ceria (CeO2) catalyzes this reaction. But the conversion efficiency of CeO2 is enhanced when the byproduct water in the reaction medium is separated by employing trapping agents like 2-cyanopyridine (2-CP). In this work, the influence of morphology of CeO2 on the direct synthesis of DMC in presence of 2-CP is reported. CeO2 catalysts of cube, rod, spindle and irregular morphology (Ce - C, Ce - R, Ce - S and Ce - N, respectively) were prepared, characterized and studied as catalysts in the said reaction conducted in a batch mode. Among all, Ce - S shows superior catalytic performance with nearly 100 mol% of DMC selectivity. Catalytic activity correlates with the concentration of acid and base sites of medium strength as well as defect sites. Ce - S has an optimum number of these active sites and thereby shows superior catalytic performance.</p>10aacid-base catalysis10aceria10aCO2 utilization10aDimethyl carbonate10ainfluence of morphology1 aUnnikrishnan, P.1 aDarbha, Srinivas  uhttp://library.ncl.res.in/content/direct-synthesis-dimethyl-carbonate-co2-and-methanol-over-ceo2-catalysts-different