Enhanced reaction system and method for alkane oxidation
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A reaction system and alkane technology, which is applied in the field of enhanced reaction system for alkane oxidation, can solve the problems of insufficient mixing of oxygen and alkane, low oxidation efficiency, etc., and achieve the effects of reducing gas material consumption, enhancing mass transfer, and reducing liquid film thickness
Inactive Publication Date: 2021-01-05
NANJING YANCHANG REACTION TECH RES INST CO LTD
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[0006] Therefore, the present invention provides an enhanced reaction system and method for alkane oxidation to overcome the problem of low oxidation efficiency in the system caused by insufficient mixing of oxygen and alkane in the prior art
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Embodiment 1
[0083] Cyclooctane is oxidized using the method described above and using the system, wherein:
[0084] The gas-liquid ratio of alkane to oxygen in the micro-interface generator is 270:1, the catalyst in the reactor is a molybdenum-nickel catalyst, the temperature is 300°C, and the space velocity of the gas-liquid emulsion is 0.8h -1 , the pressure is 0.01atm.
[0085] Analyzing the products after the reaction, it can be obtained that the conversion rate of unsaturated alkanes in this example is 34.5%, and the selectivity is 95.9%.
Embodiment 2
[0087] Undecane was oxidized using the method described above and using the system, wherein:
[0088] The gas-liquid ratio of alkanes and oxygen in the micro-interface generator is 450:1, the catalyst in the reactor is a carbon-supported iron-based catalyst, the temperature is 500°C, and the space velocity of the gas-liquid emulsion is 1.2h -1 , the pressure is 2.5atm.
[0089] Analysis of the reacted product shows that the conversion rate of unsaturated alkanes in this example is 31.7%, and the selectivity is 94.8%.
Embodiment 3
[0091] Pentadecane was oxidized using the method described above and using the system, wherein:
[0092] The gas-liquid ratio of alkane to oxygen in the micro-interface generator is 600:1, the catalyst in the reactor is a molybdenum-cobalt catalyst, the temperature is 750°C, and the space velocity of the gas-liquid emulsion is 1.5h -1 , the pressure is 5atm.
[0093] Analyzing the products after the reaction, it can be obtained that the conversion rate of unsaturated alkanes in this example is 29.6%, and the selectivity is 93.5%.
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Abstract
The invention relates to an enhanced reaction system and method for alkane oxidation. The enhanced reaction system comprises a liquid-phase feeding unit used for storing and conveying liquid alkane ofC4 or above, a gas-phase feeding unit, a micro-interface generator, a reactor and a separation tank. Gas is crushed to form micron-sized bubbles, the micron-sized bubbles and alkane are mixed to forma gas-liquid emulsion, the phase contact area of a gas phase and a liquid phase is increased, meanwhile, the thickness of a liquid film is reduced, the mass transfer resistance is reduced, the effectof enhancing mass transfer within a low preset operation condition range is achieved, and the energy consumption can be greatly reduced while the reaction efficiency is guaranteed; and meanwhile, 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 consumptionis reduced.
Description
technical field [0001] The invention relates to the technical field of alkane, in particular to an enhanced reaction system and method for alkane oxidation. 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 quality ...
Claims
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