The oxidative dehydrogenation of butane was studied at temperatures between 450 and 550°C using a conventional fixed‐bed reactor and inert membrane catalytic reactors with different feed arrangements. 0000003365 00000 n <]>> f���l!�x9����>D4.؞��������E/. Learn about our remote access options, Dept. The dehydrogenation reaction is the reaction of hydrogen atoms splitting off from an organic molecule. 0000000893 00000 n Modelling of a two-zone fluidised bed reactor for the oxidative dehydrogenation of n-butane. 201 0 obj<> endobj On the whole this process is technologically similar to the process used in the dehydrogenation of butane, but includes a number of special features: Divinyl (butadiene-1,3) can be obtained in one stage directly from butane (a mixture of pure butane with the unreacted butane-butylene mixture must be put into the reactor), but the yield of the product will be lower than in the dehydrogenation of butane in two stages. Computer-aided optimisation of catalytic dehydrogenation in packed-bed membrane reactor. One of the most exciting and ambitious home-chemistry educational projects. Butane dehydrogenation above 803 K resulted in higher formation of butadiene, a known precursor to coke. You've already subscribed with this email. Learn more. CATOFIN® Propane/Butane Dehydrogenation Description Benefits Literature Contact The CATOFIN® technology is a unique process for the production of olefins, such as propylene (from propane) and iso-butylene (from iso-butane). Vanadium-based catalytic membrane reactors for the oxidative dehydrogenation of propane. Catalytic membrane reactors for the oxidehydrogenation of propane: experimental and modelling study. No spam – just awesome science news once a week. %%EOF 203 0 obj<>stream 0000010119 00000 n 0000013672 00000 n From isobutane, isobutylene may be obtained: reaction takes place with heating to 550-600 °C (1022-1112 °F): the chromia-alumina catalyst Cr₂O₃/Al₂O₃ is used. Analysis of single and multi-stage membrane reactors for the oxidation of short-chain alkanes—Simulation study and pilot scale experiments. endstream endobj 202 0 obj<>/OCGs[204 0 R]>>/PieceInfo<>>>/LastModified(D:20071023150155)/MarkInfo<>>> endobj 204 0 obj<>/PageElement<>>>>> endobj 205 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC]/ExtGState<>/Properties<>>>/StructParents 0>> endobj 206 0 obj<> endobj 207 0 obj<> endobj 208 0 obj[/ICCBased 224 0 R] endobj 209 0 obj<> endobj 210 0 obj<> endobj 211 0 obj<> endobj 212 0 obj<>stream In addition, in the membrane reactor the formation of hot spots decreased considerably, leading to a more stable and safer operation. In the dehydrogenation of butane, hydrocarbon goes to the device in compressed form (in normal conditions, butane is a gas which easily changes to liquid at -0.5 °C or 31.1 °F). 0000000016 00000 n With the chromia-alumina catalyst, at a temperature of 450-650 °C (842-1202 °F), butadiene-1,3 forms from butane. The structure, specific surface area, and basic and redox properties of these catalysts were determined by XRD, BET, CO2-TPD, and H2-TPR. xref Vapour phase oxidation of toluene in V/Al2O3–TiO2 catalytic reactors. x�b```b``Me`e``�� �� ,@Q���� g`ط*���i�����-���> �C@$�T2�h N�S�@Z�e�"*��X��I�``0`Hc����z��A��Gצ�A�K�,�8�=�c��*H�!�z�s�n�3�@� ��u@Z����W�/@ 10�[�s�A� �J*� trailer The oxidative dehydrogenation of butane was studied at temperatures between 450 and 550°C using a conventional fixed‐bed reactor and inert membrane catalytic reactors with different feed arrangements. Comparative study of oxidative coupling of methane modeling in various types of reactor. Evaluation of porous ceramic membranes as O2 distributors for the partial oxidation of alkanes in inert membrane reactors. 0000016086 00000 n In certain conditions, an alkadiene rather than an alkene may form from butane of normal structure (CH₃-CH₂-CH₂-CH₃) during dehydrogenation. ticular interest is the dehydrogenation of n-butane to form butenes and butadiene, which are precursors for the manu-facture of synthetic rubber. The membrane reactor was found to be more efficient than a fixed‐bed reactor under most of the conditions investigated. Oxidative dehydrogenation of butane using inert membrane reactor with a non-uniform permeation pattern. 0000015053 00000 n Thermal stability of γ-Al2O3/α-Al2O3 mesoporous membranes. For hydrogen to split off from a saturated aliphatic (non-cyclical) hydrocarbon, heating of up to 500-600 °C (or 932-1112 °F). Effect of the membrane activity on the performance of a catalytic membrane reactor. The catalyst should not make contact with the butylene for more than 2-3 seconds, otherwise a large quantity of secondary products and soot may form, which affects the yield of the product of reaction – butylene. the presence of a catalyst is required to carry it out. 0000003946 00000 n With a piston, butane is moved to the heat exchanger, where it is heated, evaporated, and thus changes to gaseous form. 20 wt% V as V2O5on MgO and 17.8 wt% Mo as MoO3on MgO were used as catalyst for the ODH of n-butane. On making contact with the catalyst, the butane vapor dehydrates, forming a mixture from unreacted n-butane, butylenes (butene-1 and butene-2), hydrogen and secondary products. When inert membrane reactors were employed, a ceramic membrane was used to distribute oxygen to a fixed bed of V‐Mg‐O catalyst. 0000003869 00000 n Please choose a different one. We've sent you a confirmation email. and you may need to create a new Wiley Online Library account. In dehydrogenation, butane does not form in a cycle and does not form cyclobutene because cyclobutene has an unstable structure; at the reaction temperature it is also capable of thermally breaking down to ethylene СН₂=СН₂. Please confirm your subscription to begin receiving our newsletter. . 0000011968 00000 n This is characteristic for alkanes with a carbon chain containing more than 4 carbon atoms. Kinetic Study of the Oxidative Dehydrogenation of Butane on V/MgO Catalysts. The present study shows that Pt/Mg(In)(Al)O exhibits superior performance for butane dehydrogenation compared to supported Pt catalysts promoted with Sn, Ge, … A reactor for obtaining butylenes from n-butane is a tubular device. x�bbb`b``Ń3� �1@� Ǵ� This is a catalytic process – i.e. 0000022233 00000 n After the separation of secondary products, butane and butylene in the mixture, butylene may be subjected to further dehydrogenation – in this way butadiene-1,3 can be obtained. Bloggers and marketing: marketing@melscience.com, Features of the dehydrogenation process of butane, Characteristics of ammonia and catalytic oxidation, the formation of divinyl (butadiene-1,3) is also possible without a, the yield of butadiene-1,3 can be increased by decreasing its partial pressure in the reactor – this can be achieved by adding. Reactant distribution by inert membrane enhances packed-bed reactor stability. The vanadium-oxygen centers are necessary to activate butane, while the MgO component is necessary to modify the acidic property of vanadium oxide and to reduce the … Simulation of a membrane reactor for oxidative dehydrogenation of propane, incorporating radial concentration and temperature profiles. The features of the dehydrogenation reaction of lower alkanes can be seen clearly based on the example of hydrogen splitting off from the butane molecule. 0000001803 00000 n 0000018756 00000 n 0000005257 00000 n Please check your email for instructions on resetting your password. Performance evaluation of a novel reactor configuration for oxidative dehydrogenation of ethane to ethylene. N-Butane Oxidative Dehydrogenation by Membrane Reactor. Hydrogen production via natural gas steam reforming in a Pd-Au membrane reactor. 0000011594 00000 n A reactor for obtaining butylenes from n-butane is a tubular device. By entering your email address you agree to our Privacy Policy. 0000001174 00000 n Oxidative dehydrogenation of butane on V/MgO catalytic membranes. Modeling-based optimization of a fixed-bed industrial reactor for oxidative dehydrogenation of propane. In dehydrogenation, C-H bonds are torn, hydrogen atoms split off from neighboring carbon atoms, and in this place a double bond forms. Click here for amazing chemistry experiments with detailed descriptions.
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