Dehydration of glycerol to acrolein mechanism
WebGlycerol dehydration to acrolein over acid catalysts is one of the most promising ways of valorization, because this compound is an important chemical intermediate used in, for example, the DL-methionine synthesis. In this Minireview, we give a detailed critical view of the state-of-the-art of this dehydration reaction. WebThe mechanism of glycerol degradation was complicated by the many unidentified products, so simplifications Supplementary data associated with this article can be …
Dehydration of glycerol to acrolein mechanism
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WebFeb 25, 2024 · The calculated equilibrium yields of the dehydration reaction from glycerol to acrolein, acetol, ethanal, methanol, and water and the experimental yields of a Pd/LaY catalyst were compared. WebApr 11, 2024 · The desilicated zeolites maintained the glycerol conversion around 70% up to 7 h of TOS, while the acrolein yield decreased to 20% at the same time. Catalysts of tungsten, zirconium, and niobium oxides …
WebMar 5, 2009 · Glycerol has become readily available from biodiesel industry. High functionality and relatively low price make it a potential building block to produce value-added derivatives such as acrolein. In this study, low-pressure packed-bed gas-phase dehydration of glycerol was investigated in presence of various solid acid catalysts, … WebIn this study, DFT calculations using the generalized gradient approximation with periodic boundary conditions was used to study the mechanism of dehydration of glycerol to acrolein on the (1 0 0 ...
Web陶丽芝，南方科技大学化学系副教授、博士生导师、课题组长。. 2011年于清华大学化学系获硕士学位 (导师：徐柏庆教授)，研究方向为固体酸碱多相催化化学。. 之后前往美国加州大学戴维斯分校 (University of California, Davis) 全球著名电子顺磁共振光谱 (Electron ... WebSupercritical carbon dioxide (SC-CO 2) has been used for the first time as a reaction medium for the dehydration of glycerol to acrolein catalyzed by a solid acid.Unprecedented catalyst stability over 528 hours of time-on-stream was achieved and the rate of coke deposition on the zeolite catalyst was the lowest among extensive …
WebThe gas-phase catalytic dehydration of glycerol to acrolein was carried out in a Two-Zone Fluidized-Bed Reactor (TZFBR) using a 20 wt. % phosphotungstic acid (H 3 PW 12 O 40) catalyst supported on …
WebBooming biodiesel production worldwide demands valorization of its byproduct of glycerol. Acrolein, an important intermediate chemical, can be produced by gas-phase glycerol … pointing stick useWebAcrolein production from glycerol is a promising alternative route and involves total dehydration of glycerol. Acrolein can be formed either in the liquid phase or in the gas phase. Generally, the gas phase gives higher acrolein yields. ... 3.3.1 Reaction mechanism. The acrolein formation pathway closely resembles the dehydration … pointing skeleton hand imagesWebIn this context, glycerol dehydration to acrolein by acid catalysis appears to be a potential route of glycerol valorization, since acrolein is an important intermediate for many … pointing teethWebMay 1, 2024 · The presence of Brönsted acid sites is reported to favor the dehydration of glycerol to acrolein, whereas Lewis acid sites promote the selective formation of hydroxyacetone [17]. ... Previous work [9] reported that glycerol hydrogenolysis to 1,2-PDO proceeds through a dehydrogenation-dehydration-hydrogenation mechanism. In that … pointing sword at cameraWebJan 10, 2014 · Only few literature examples are available concerning acrolein synthesis from glycerol using continuous flow processes. The double dehydration of glycerol could be achieved under sub- and supercritical water as reaction media [12–15]. The critical temperature and pressure of water were 374°C and 220 bar, respectively. pointing sword at camera referenceWebIt has been shown that the catalytic dehydration reaction of glycerol leads to the formation of acrolein and hydroxyacetone (HA), as primary products [4, 16, 17]. However, the … pointing ratioWebDec 4, 2024 · Abstract Vapour phase catalytic dehydration of glycerol to acrolein was studied over phosphotungstic acid (PTA) supported (with different loadings of PTA) on Y-zeolite catalysts. The active component PTA was varied between 10 and 40% w/w on the support Y-zeolite and was synthesized by the wet impregnation method. The physico … pointing terms definition