Reaction-regeneration device and process for alkane dehydrogenation to alkene
AssigneeChina University of Petroleum (East China)
InventorsChunyi Li, Guowei Wang
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Abstract
A reaction-regeneration device for catalytic dehydrogenation or/and catalytic cracking of alkanes comprises a reaction device and a regeneration device. The reaction device comprises a reactor and a disengager, and the disengager is located at an upper part of the reactor. The reactor comprises a tapering section, and diameters of cross sections of the tapering section gradually decrease from bottom to top. Secondary conversion of alkenes caused by back-mixing is reduced, and thus the yield and selectivity to alkenes are increased.
Claims17
A reaction-regeneration device for catalytic dehydrogenation or catalytic cracking of alkanes, comprising a reaction device and a regeneration device,
- the reaction device comprising a reactor and a disengager,
- the disengager being located above the reactor,
- wherein the reactor comprises a tapering section, and diameters of cross sections of the tapering section gradually decrease from bottom to top,
- a catalyst riser is arranged inside the reactor, and
- an outlet end of a regenerated catalyst conduit is connected with the catalyst riser.
A reaction-regeneration device for catalytic dehydrogenation or catalytic cracking of alkanes, comprising a reaction device and a regeneration device,
- the reaction device comprising a reactor and a disengager,
- the disengager being located above the reactor,
- wherein the reactor comprises a tapering section, and diameters of cross sections of the tapering section gradually decrease from bottom to top,
- the regeneration device comprising a regenerator for accommodating a catalyst and a regeneration disengager,
- diameters of cross sections of the regenerator being decreased from top to bottom,
- wherein a circular pipe sleeve is arranged at a lower position inside the regenerator and is coaxial with the regenerator.
A reaction device for producing alkenes through catalytic dehydrogenation-cracking of alkanes, comprising a catalytic dehydrogenation-cracking reactor and a disengager, the disengager being located above the reactor,
- wherein the reactor comprises a dense-phase dehydrogenation reaction section and a cracking reaction section,
- the cracking reaction section is located below the dense-phase dehydrogenation reaction section,
- the reactor further comprises a tapering section,
- the tapering section is located above the dense-phase dehydrogenation reaction section,
- diameters of cross sections of the tapering section are decreased from bottom to top,
- a catalyst riser extends into the cracking reaction section through a lower part of the cracking reaction section, and
- an outlet end of a regenerated catalyst conduit is connected with the catalyst riser.
Dependencies are inferred from the claim text.