CN101940903A - Process method for improving catalytic reaction through pulse pressure wave - Google Patents
Process method for improving catalytic reaction through pulse pressure wave Download PDFInfo
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- CN101940903A CN101940903A CN 201010163507 CN201010163507A CN101940903A CN 101940903 A CN101940903 A CN 101940903A CN 201010163507 CN201010163507 CN 201010163507 CN 201010163507 A CN201010163507 A CN 201010163507A CN 101940903 A CN101940903 A CN 101940903A
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Abstract
The invention discloses a process method for improving the catalytic reaction through a pulse pressure wave. The method comprises seven steps of the catalytic chemical reaction of a reaction tower: external diffusion to inside, internal diffusion to inside, adsorption on the surface of a catalyst, reaction, desorption from the surface of the catalyst, external diffusion to outside, and internal diffusion to outside. A pulse pressure valve is arranged on the pressure pipeline of the reaction tower, and a pulse pressure wave capable of accelerating the catalytic chemical reaction of reactants is generated under the automatic control of a PLC and has a pulse pressure of 0.02 to 8MPa. In the method, the movement of gases forms an intense turbulence due to the change of the pulse pressure and the mass transfer velocity among the reactants is accelerated along with the generation of the gas turbulence, so that the catalytic reaction is promoted and the effect of the catalytic reaction is improved. Meanwhile, the pulse pressure wave can also make the reactants better overcome the capillary tension in the microscopic channels of the catalyst under the action of high pulse pressure, make the gases enter the packed channels and the microscopic channels of the catalyst, and fast diffuse the products from the surface of the catalyst, so that the performance of the catalytic chemical reaction is improved.
Description
Technical field
The present invention relates to the catalytic reaction chemical method, especially relate to and a kind ofly produce pulsed pressure wave by continuous adjustment pressure size and reach the process of improving catalyzed chemical reaction.
Background technology
For chemical reaction, temperature and pressure is two a crucial factors, and only in suitable temperature and pressure scope, chemical reaction could carry out and finish smoothly.In the various reaction towers of petrochemical industry, particularly in the gas-liquid reaction rectifying column and fixed bed catalyst tower in petrochemical industry.General this type of rectifying and fixed bed catalyst generally include following seven steps: extend out spill into, in diffuse into, be adsorbed on catalyst surface, react, from the catalyst surface desorption, in diffuse out and extend out and shed.In the whole process of catalytic reaction in existing fixed bed reaction tower, the pressure of catalytic reaction changes little, and gas can not form fierce turbulent flow in advancing, and mass transfer velocity is slow between the reactant, and solution-air catalytic reaction effect is not high.
Summary of the invention
At the problem that exists in the above-mentioned prior art catalytic reaction process, the present invention proposes a kind of process of improving catalytic reaction by pulsed pressure wave.
The process of improving catalytic reaction by pulsed pressure wave of the present invention comprises seven steps of fixed bed reaction tower catalyzed chemical reaction: extend out spill into, in diffuse into, be adsorbed on catalyst surface, react, from the catalyst surface desorption, diffuse out and extend out and shed, the pressure piping of described reaction tower is provided with the pulse valve, automatically control the pulsed pressure wave that makes the generation of pulse valve can make reactant quickening catalyzed chemical reaction by PLC, the pulse of described pulsed pressure wave is 0.02-8MPa.
The preferred 0.05-0.3MPa of described pulse.
The mechanism that the present invention can improve catalytic reaction by pulsed pressure wave is: in fixed bed reaction tower catalytic reaction process, when reactant gas and liquid in catalytic reaction process, owing to be applied with pulsed pressure wave in the reaction tower, thereby advancing of gas can form fierce turbulent flow owing to pulse changes, generation along with gas turbulence, aggravate the mass transfer velocity between the reactant, promoted catalytic reaction to carry out, improved the catalytic reaction effect.Can also make reactant under the effect of high impulse pressure, overcome pore tension force in the catalyst microcosmic duct better by pulsed pressure wave simultaneously, thereby gas is entered in the microcosmic duct of the accumulation duct of catalyst and catalyst itself, when under low pulse effect, the formed product of reaction is owing to inside and outside concentration difference in the pore in pore, product is promptly diffused out from pore, leave catalyst surface, improve on the catalytic reaction chemical property thereby reach.
In catalytic reaction, when reactant molecule or ion are piled up on the surface in the nanoscale microcosmic duct that duct and catalyst itself had at the formed micron order of the accumulation that is adsorbed on catalyst, just must be diffused into earlier in the duct, and wanting to break away from catalyst surface, product just must from the duct, flow out, the present invention makes full use of pulse exactly makes reactant can be diffused rapidly in the duct, simultaneously product is promptly broken away from from the duct, diffusion and disengaging by continuous like this cycle alternation fast, reach the carrying out of improving and accelerating catalytic reaction, improve the catalytic reaction effect.
The present invention is by applying a kind of pulsed pressure wave in existing fixed bed reaction tower catalytic reaction process, impel the gas of advancing to produce fierce turbulent flow, generation along with gas turbulence, overcome the pore tension force in the catalyst microcosmic duct, gas is entered in the microcosmic duct of the accumulation duct of catalyst and catalyst itself, product is promptly diffused out from pore, leave catalyst surface, mass transfer velocity between the aggravation reactant, improve on the catalytic reaction chemical property thereby reach, promote catalytic reaction to carry out, improved the catalytic reaction effect.
The specific embodiment
The process that the present invention improves catalyzed chemical reaction by impulse wave be included in existing fixed bed reaction tower catalytic reaction inside and outside diffuse into, in diffuse into, be adsorbed on catalyst surface, react, from the catalyst surface desorption, diffuse out and extend out seven steps of the catalyzed chemical reaction that sheds, in above-mentioned existing seven whole processes of reactions steps, the pulse valve is set on the pressure piping of reaction tower, by PLC automatically control the pulse valve is produced can make in reactor reactant quickening catalyzed chemical reaction pulsed pressure wave, the pulse of described pulsed pressure wave is 0.05-0.3MPa.Extending out of beginning of catalytic reaction spill into and in diffuse into two steps and last diffusing out and extend out and shed in two steps, pulsed pressure wave can make the gas of advancing form the turbulent flow of fierceness owing to the pulsatile change of pressure from bottom to top, the interior external diffusion of mass transfer between the aggravation reactant, thereby the carrying out that promotes and accelerate catalytic reaction.Being adsorbed on catalyst surface, reacting of catalytic reaction interlude, from three steps of catalyst surface desorption, reactant will be under the assistance of high pressure wave, better overcome the pore tension force in catalyst microcosmic duct, enter into the accumulation duct and the catalyst material duct of catalyst, thereby at catalyst surface generation chemical reaction.And when pulse was low pressure, the formed product of reaction in pore left catalyst surface because the concentration difference inside and outside in pore can make product diffuse out rapidly from pore.Therefore pulse also can well improve catalyzed chemical reaction from microcosmic.
Claims (2)
1. process of improving catalytic reaction by pulsed pressure wave, it comprises seven steps because of fixed bed reaction tower catalyzed chemical reaction: extend out spill into, in diffuse into, be adsorbed on catalyst surface, react, from the catalyst surface desorption, diffuse out and extend out and shed, it is characterized in that: the pressure piping of reaction tower is provided with the pulse valve, automatically control the pulsed pressure wave that makes the generation of pulse valve can make reactant quickening catalyzed chemical reaction by PLC, the pulse of described pulsed pressure wave is 0.02-8MPa.
2. according to claim 1ly a kind ofly improve the process of catalytic reaction by pulsed pressure wave, it is characterized in that: described pulsed pressure wave pulse is 0.05-0.3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010163507 CN101940903A (en) | 2010-05-04 | 2010-05-04 | Process method for improving catalytic reaction through pulse pressure wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010163507 CN101940903A (en) | 2010-05-04 | 2010-05-04 | Process method for improving catalytic reaction through pulse pressure wave |
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| Publication Number | Publication Date |
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| CN101940903A true CN101940903A (en) | 2011-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010163507 Pending CN101940903A (en) | 2010-05-04 | 2010-05-04 | Process method for improving catalytic reaction through pulse pressure wave |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079676A (en) * | 1992-02-25 | 1993-12-22 | 挪威国家石油公司 | Catalytic polyphase reactor |
| CN1443931A (en) * | 2002-03-08 | 2003-09-24 | 日产自动车株式会社 | Exhaust pipe for four-cylinder motor |
| CN1795043A (en) * | 2002-08-15 | 2006-06-28 | 维罗西股份有限公司 | Integrated combustion reactors and methods of conducting simultaneous endothermic and exothermic reactions |
-
2010
- 2010-05-04 CN CN 201010163507 patent/CN101940903A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079676A (en) * | 1992-02-25 | 1993-12-22 | 挪威国家石油公司 | Catalytic polyphase reactor |
| CN1443931A (en) * | 2002-03-08 | 2003-09-24 | 日产自动车株式会社 | Exhaust pipe for four-cylinder motor |
| CN1795043A (en) * | 2002-08-15 | 2006-06-28 | 维罗西股份有限公司 | Integrated combustion reactors and methods of conducting simultaneous endothermic and exothermic reactions |
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Open date: 20110112 |