Oxidative Dehydrogenation of Ethylbenzene Over Poly(furfuryl alcohol)-Derived CMK-1 Carbon Replica

Abstract

Poly(furfuryl alcohol) was introduced into a pore system of MCM-48 silica by the precipitation polycondensation of furfuryl alcohol (FA). The complete filling of the pores without the deposition of significant amounts of polymer on the external surface of MCM-48 was obtained at the FA/MCM-48 mass ratio close to 1.0. The final structure of carbon replica was formed by subsequent carbonization and extraction of SiO 2 with HF. The carbonization temperature strongly influenced the surface composition of the formed carbon replicas. The highest catalytic activity in the oxidative dehydrogenation of ethylbenzene was observed for CMK-1 with the highest concentration of phenol and carbonyl groups, recognized as active sites of the studied reaction.Graphical Abstract

Oxidative dehydrogenation of ethylbenzene over CMK-1 and CMK-3 carbon replicas with various mesopore architectures

“…All calculated parameters are comparable with those reported elsewhere for CMK-1 and CMK-3, however the number of papers regarding furfuryl alcohol as a carbon precursor is rather limited [21,26,[29][30][31]. Moreover, the method of precipitation polycondensation of FA is quite unique [22,23].…”

“…soot, graphite, carbon nanofilaments [14], activated carbons [16,17], multi-walled carbon nanotubes, onion-like carbons [18,19], nanodiamonds [20]) were tested in M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 ODH. Among them, CMK-type materials showed a very attractive catalytic activity [8,[21][22][23].…”

“…Required MCM-48 and SBA-15 silica templates were synthesized using the methods described earlier [22,23]. The carbon precursors were deposited in the pore system of mesoporous silicas by precipitation polycondensation of furfuryl alcohol (FA) or incipient wetness impregnation with sucrose.…”

Influence of carbon precursor on porosity, surface composition and catalytic behaviour of CMK-3 in oxidative dehydrogenation of propane to propene

“…Carbon materials with a high surface area and large pore volume have found an increasing number of applications in catalysis, adsorption, separation or electrochemistry [6][7][8][9][10][11][12][13][14]. Very promising results were collected over metal-free carbon nanomaterials (e.g.…”

Reflections on the value of electron microscopy in the study of heterogeneous catalysts

“…(a) Full structure determination by electron crystallography Thanks largely to the subsequent work of my former colleague, Osamu Terasaki, [71,72] numerous structural determinations have been made by EC of very many mesoporous silicas, and of the corresponding mesoporous carbons prepared, such as CMK-1 and CMK-4 (derived by moulding with organic material such as sucrose, as described by Ryoo [73,74]). The 3D structure model of MCM-48 (which has interesting mesopores that facilitate intra-crystal diffusion of reactants), shown in figure 14 was determined by EC.…”