Abstract-The zeolites and oxide catalysts are investigated in the conversion of bio-ethanol. It is shown that the formation of the products depends on the feedstock composition and the composition of the reaction mixture. It is determined that at the conversion of bio-ethanol over the zeolites 3A, 4A, 5A, and 13 X products of cracking, reforming, dehydration and oligomerization of ethylene are formed. The cerium-containing catalysts are studied via electron microscopy and temperatureprogrammed desorption of ammonia. Doping Ce/γ-Al 2 O 3 catalyst with lanthanum is shown to increase its dispersion and the number of active acid sites, thereby improving its activity.
The preparation of a CeO 2 /CaA catalyst by the solution combustion method leads to enhanced catalyst activity in the conversion of ethanol to ethylene with increased ethylene content in the reaction products from 67 to 89 vol.%. The increase in catalyst activity may be related to an increase in the number of active sites on the catalyst surface, which is attributed to a decrease in the strength of the interaction of the active component and the support in accord with the TPR-H 2 data.
Design of high effective catalysts with unique properties opens good perspectives for solving environmental problems of cleaning waste gas, particularly from toxic impurities of organic solvents. A new thermostable nanostructured composite materials based on shungyte was obtained and determined their adsorption capacity on the model substance o-xylene. Xylene used as a model substance is a part of the organic solvent presents in waste industrial gases. Best xylene sorbents (449.7 mg/g)-activated shungyte containing 70% carbon and saksaul charcoal (554.3 mg/g). Then polyoxide catalysts on the base of transition metals (Ni, Mn, Cu) modified by the rare earth elements (La, Ce and Nd), supported on a granular carrier were studied in the reaction of deep oxidation of o-xylene. 100% activity showed 7.0% Cu-Mn-Ce-catalyst at T: 250-300 °C, C xylene : 0.6 g/m 3 , the optimum space velocity of gas-1,200 h -1 for catalysts supported on a granular carrier. The results obtained can be used in the purification of waste gas from paint, furniture, cable, printing and other enterprises from the impurities of toxic organic solvents.
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