Topic
MCM-41
About: MCM-41 is a research topic. Over the lifetime, 2355 publications have been published within this topic receiving 91416 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: The potentialities of mesoporous materials both as catalysts and catalytic supports in reactions like alkylation, hydrogenation, and oxidation of various substrates are reviewed in this article.
Abstract: The potentialities of mesoporous materials both as catalysts and catalytic supports in reactions like alkylation, hydrogenation, and oxidation of various substrates are reviewed. Much of our current research effort is devoted to exploring the mechanistic aspects of the reactions, the role of the catalyst structure, and to characterizing the active sites.
64 citations
TL;DR: Heterogeneous acid catalyst comprising 12-tungstophosphoric acid (30%) and MCM-41 was synthesized and characterized by X-ray diffraction (XRD), surface area measurement (BET method), and solid state 29 Si NMR.
Abstract: Heterogeneous acid catalyst comprising 12-tungstophosphoric acid (30%) and MCM-41 was synthesized and characterized by X-ray diffraction (XRD), surface area measurement (BET method), and solid state 29 Si NMR. The use of synthesized catalyst was explored for biodiesel production by esterification of free fatty acid, palmitic acid with methanol. The effect of various reaction parameters such as catalyst concentration, acid/alcohol molar ratio, and temperature were studied to optimize the conditions for maximum conversion. The catalyst shows high activity in terms of 100% conversion toward palmitic acid and a high turnover number, 1992. The kinetic studies as well as the Koros Nowak test were also carried out, and it was found that esterification of palmitic acid follows first order kinetics and the rates are not mass transfer limited. The excellent catalytic performance is attributed to the large surface area and pore diameter of the mesoporous support, MCM-41 as well as the Bronsted acid strength of TPA, as active sites. The catalyst shows the potential of being used as a recyclable catalytic material after simple regeneration without significant loss in conversion. As an application, preliminary studies were carried out for biodiesel production from waste cooking oil, as feedstock without any pretreatment, and with methanol over the present catalyst. Studies also reveal that the catalyst can be used for biodiesel production from waste cooking oil.
64 citations
TL;DR: In this paper, the effect of Mo content on the activity of the catalyst was investigated for syngas methanation in a fixed-bed reactor, and the results showed that the addition of MoO3 could enhance the interaction between metal nickel and the support in the way of Ni-Mo alloy, which inhibited the catalyst sintering.
64 citations
TL;DR: In this paper, a mesoporous MCM-41 containing intraporous cesium oxide particles have been prepared by impregnation of aqueous Cesium acetate and subsequent calcination, and characterized by 133 Cs MAS NMR, CO 2 temperature programmed desorption and nitrogen physisorption.
Abstract: Mesoporous MCM-41 containing intraporous cesium oxide particles have been prepared by impregnation of aqueous cesium acetate and subsequent calcination, and characterized by 133 Cs MAS NMR, CO 2 temperature programmed desorption and nitrogen physisorption. The amount of framework aluminum of the MCM-41 support appeared to be very important regarding the strength of the basic sites. The Michael addition of diethyl malonate to neopentyl glycol diacrylate catalyzed by MCM-41 supported cesium oxide showed a high regioselectivity, in contrast to bulk cesium oxide.
64 citations
TL;DR: In this paper, a mesoporous titanium oxo phosphate was synthesized by a non-ionic template route (N 0 I 0 ), which is dominated by hydrogen bonding between self-assembled surfactant micelles and inorganic precursors.
64 citations