The effect of Si/Al ratios on the catalytic activity of CuY zeolites for DMC synthesis by oxidative carbonylation of methanol: a theoretical study

Tuning of Catalytic Property Controlled by the Molecular Dimension of Palladium–Schiff Base Complexes Encapsulated in Zeolite Y

“…The exercise of removal of impurities is truly significant so as to comprehend better the origin of modified catalysis with respect to the parent zeolite Y as it has been observed that the parent zeolite Y (Na-zeolite Y) shows fairly less % conversion as well as selectivity (shown in Table 4). Though another direction of research could be with the change in Si/Al ratio as it definitely affects the catalytic activity of the encapsulated complexes, 28 the present work highlights on the catalysis of hybrid host–guest systems with the Si/Al ratio of the host kept constant by taking the same lot of parent zeolite Y for the synthesis of all encapsulated complexes.…”

Solid base catalysts derived from Ca–Al–X (X = F−, Cl− and Br−) layered double hydroxides for methanolysis of propylene carbonate

“…Dimethyl carbonate (DMC), as a green organic ne chemical intermediate, is widely used in carbonylation, methylation and methoxylation reactions. 1,2 Several ways are developed for DMC synthesis, such as oxidative carbonylation of methanol, [3][4][5] trans-esterication of methanol with cyclic carbonate, [6][7][8][9] alcoholysis of urea [10][11][12] and direct synthesis from carbon dioxide and methanol. [13][14][15][16] As compared to other routes, DMC synthesis by trans-esterication of propylene carbonate (PC) with methanol under mild conditions is a promising and environmentally benign route, which has earned much attention of researchers.…”

Effect of NH 4 + exchange on CuY catalyst for oxidative carbonylation of methanol

“…Huang et al [17] established a quantitative relationship between the amount of Brönsted acid sites and catalytic activity for oxidative carbonylation over CuY catalysts with different Si/Al ratios. Zhang et al [18] also investigated the activity of CuY with different Si/Al ratios for the oxidative carbonylation of methanol to DMC systematically by a density functional theory method. They indicated that the CuY zeolite with a Si/Al ratio = 6.5 had the highest catalytic activity.…”