Reactors with membrane catalysts: Operating regimes and kinetic experiments

Transport Reagents through the Pore Structure of a Membrane Catalyst under Isothermal and Non-Isothermal Conditions

“…Figure 4 shows that the conversion of methane on the traditional and membrane catalysts differs significantly under the same contact time. This is indicative of DRM intensification, which was observed in [ 7 ] on traditional and membrane catalysts with an active component in the form of tungsten carbide (WC). This phenomenon was reproduced on an active substance in the form of molybdenum carbide (Mo 2 C).…”

“…Such a mode is especially promising for fast reactions, in which kinetic limitations are often manifested. Detailed experimental evidence of the above can be found elsewhere [ 5 , 6 , 7 ]. However, the published materials are limited to a qualitative assessment of the improvement in the contact of reactants with the catalyst surface, without a deep explanation of the reasons for the observed phenomena.…”

Synthesis of membrane catalysts based on Mo2C

“…It consists in conducting chemical reaction on the surface of a solid (substrate) with the formation of a solid product. For obtaining a membrane catalyst, the initial support material was placed in a cold wall CVD reactor, in which Мо(СО) 6 vapor circulated in an atmosphere of nitrogen. The heater of the support was arranged inside the tubular membrane element to maintain a low temperature of the gas atmosphere (<150°С) and to prevent the intensive decomposition of molybdenum hexacarbonyl in the gas phase.…”

“…Molybdenum hexacarbonyl Мо(СО) 6 was used as the initial volatile compound of molybde num. Deposition occurred in a flow of N 2 (A grade) at different temperatures.…”

“…The carbon dioxide conversion of methane (CDCM) belongs to the most promising methods in demand for natural gas process ing. In a number of studies [5][6][7], it was found that the implementation of this reaction in a mambrane reac tor contator and a membrane reactor distributor with the use of porous membrane catalysts makes it possible to increase the degree of conversion, the selectivity, and the rate of process. A number of compounds (WC, Mo 2 C, and (La-Ce)-MgO-TiO 2 /Ni-Al), which do not contain expensive platinum group metals, can be used as active components.…”