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Alkane dehydrogenation reaction strengthening system and method

A technology for alkane dehydrogenation and alkane, which is applied in the field of strengthening systems for alkane dehydrogenation reaction, can solve the problems of low oxidation efficiency, insufficient mixing of oxygen and alkane, etc., to ensure reaction rate, reduce gas consumption, and reduce gas-liquid ratio. Effect

Inactive Publication Date: 2021-01-05
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For this reason, the present invention provides an intensified system and method for alkane dehydrogenation reaction to overcome the problem of low oxidation efficiency in the system caused by insufficient mixing of oxygen and alkane in the prior art

Method used

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  • Alkane dehydrogenation reaction strengthening system and method

Examples

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Effect test

Embodiment 1

[0088] Cyclooctane is dehydrogenated using the method described above and using the system wherein:

[0089] The catalyst in the reactor is a chromium catalyst, the temperature is 400° C., and the pressure is 0.01 atm.

[0090] Analysis of the reacted product shows that the conversion rate of unsaturated alkanes in this example is 30.3%, and the selectivity is 96.2%.

Embodiment 2

[0092] Undecane is dehydrogenated using the method described above and using the system wherein:

[0093] The catalyst is a chromium oxide catalyst, the temperature is 550° C., and the pressure is 1.55 atm.

[0094] Analysis of the reacted product shows that the conversion rate of unsaturated alkanes in this example is 29.9%, and the selectivity is 95.8%.

Embodiment 3

[0096] Octadecane is dehydrogenated using the method described above and using the system, wherein:

[0097] The catalyst in the reactor is a chromium oxide catalyst, the temperature is 600° C., and the pressure is 3 atm.

[0098] Analyzing the products after the reaction, it can be obtained that the conversion rate of unsaturated alkanes in this example is 28.6%, and the selectivity is 93.1%.

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Abstract

The invention relates to an alkane dehydrogenation reaction strengthening system and method. The alkane dehydrogenation reaction strengthening system comprises a liquid-phase feeding unit, a gas-phasefeeding unit, a micro-interface generator, a reactor and a separation tank, wherein the liquid-phase feeding unit is used for storing and conveying C5 or above C5 alkane. According to the invention,gas is crushed to form micron-scale micro-bubbles, and the micro-bubbles are mixed with alkane to form a gas-liquid emulsion, so that the phase contact area of a gas phase and a liquid phase is increased, the effect of enhancing mass transfer within a lower preset operation condition range is achieved, and the energy consumption can be greatly reduced while the reaction efficiency is ensured; andmeanwhile, mass transfer is greatly enhanced, so that the gas-liquid ratio can be greatly reduced, and the energy consumption of subsequent gas circulation compression is reduced while the gas material consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of alkane, in particular to an intensified system and method for alkane dehydrogenation reaction. Background technique [0002] Dehydrogenation of alkanes is the conversion of saturated hydrocarbons to unsaturated hydrocarbons (e.g., alkenes) and hydrogen (H 2 ) process method. Olefins produced by dehydrogenation of alkanes can be used as intermediates in the production of other hydrocarbon conversion products such as propylene glycol and fuels. Examples of alkane dehydrogenation processes may include the conversion of ethane to ethylene, propane to propylene, isobutane to isobutene, ethylbenzene to styrene and C6 to C19 alkanes to the corresponding C6 to C19 monoolefins transformation. [0003] The dehydrogenation of alkanes to alkenes can generally be classified as oxidative or non-oxidative reactions. Disadvantages associated with oxidative dehydrogenation include high exotherm and low selectivity and...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01J8/22C07C5/333C07C11/02
CPCB01J8/22B01J19/0093C07C5/322C07C2523/26C07C11/02
Inventor 张志炳周政张锋李磊孟为民杨高东罗华勋杨国强田洪舟王宝荣
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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