Aromatization of n-hexane on Mo2C catalysts

Abstract

The reaction of n-hexane and 1-hexene has been investigated on unsupported and supported Mo 2 C catalysts. Pure Mo 2 C catalyses the dehydrogenation and aromatization of n-hexane at and above 723 K. Benzene was formed with the highest selectivity, $65%, at 773-823 K at a conversion of $25%. Mo 2 C also exhibited high activity towards the reaction of n-hexane when it was deposited in a small amount (2-10%) on SiO 2 . It is assumed that the production of benzene occurs through the formation and subsequent dehydrogenation-cyclization of hexene. Catalysts prepared in situ revealed that the activation and aromatization of hexane and hexene do not require the presence of Mo-O species in the Mo 2 C.

Efficient H2 Production from Ethanol over Mo2C/C Nanotube Catalyst

“…Recently we found that the combination of Mo 2 C with ZSM-5, which exhibited a unique catalytic performance in the direct conversion of methane and other alkanes into benzene [16][17][18][19][20][21][22][23][24][25][26][27], is an excellent catalyst for the aromatization of ethanol, too [28,29]. High yield of aromatics (toluene, xylenes and benzene in decreasing selectivity) was obtained at 773-873 K. In this very complex process; beside the activation of ethanol, two reactions seemed important: the dehydration of ethanol to ethylene, and its subsequent dehydrocyclization to aromatics.…”

Aromatization of ethanol on Mo2C/ZSM catalysts

“…Catalytic reaction was carried out at 1 atm of pressure in a fixed-bed, continuous flow reactor consisting of a quartz tube (8 mm id) connected to a capillary tube [5,13]. The flow rate was in general 40 mL/min, but the reaction was also studied at different space velocities.…”

“…Mo 2 C-containing catalysts were the same as used in the previous study [13]. Unsupported Mo 2 C was prepared by the carburization of MoO 3 (products of ALFA AESAR) by C 2 H 6 /H 2 [25].…”

“…In the present work an account is given on the conversion of ethanol into aromatics, which received very little attention, yet. As a catalyst we use Mo 2 C-containing ZSM-5 zeolite, which proved to be an effective material in the aromatization of methane [2][3][4][5][6][7][8] and various alkanes [12,13].…”

Different Catalytic Reactions of n-Hexane and 1-Hexene on Molybdenum Based Catalysts

“…On the other hand, formation of different molybdenum species such as Mo 2 C after the exposure of MoO 2 to a mixture of n-hexane/hydrogen mixture during the catalytic reaction was not observed at the experimental conditions employed in this work. In order to obtain such molybdenum carbide species, it is required to expose MoO 3 to a mixture of hydrocarbon-hydrogen at relatively high temperature [11]. In the case of the used metallic Mo(0) sample, the surface is partially oxidized following its exposure to air as could be deduced from the slight increase in the BE of the Mo (3d) spin-orbit components (Fig.…”