CN1626624A - Catalyst and absorption tower of using catalyst - Google Patents
Catalyst and absorption tower of using catalyst Download PDFInfo
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- CN1626624A CN1626624A CN 200310112591 CN200310112591A CN1626624A CN 1626624 A CN1626624 A CN 1626624A CN 200310112591 CN200310112591 CN 200310112591 CN 200310112591 A CN200310112591 A CN 200310112591A CN 1626624 A CN1626624 A CN 1626624A
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- zinc oxide
- catalyst
- nano zinc
- desulfurization
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
A catalyst for purifying the petroleum features that it contains nanotubes of zinc oxide. An absorption tower using said catalyst is also disclosed. Its advantage is high desulfurizing effect.
Description
[ technical field]A method for producing a semiconductor device
The present invention relates to a catalyst and an absorption tower using the same, and more particularly, to a catalyst for petroleum purification and an absorption tower using the same.
[ background of the invention]
The corrosive harmful substances in the liquefied petroleum are mainly sulfides such as sulfur dioxide, and the like, and the preparation processes of oil refineries are different, so that the existing form of the sulfides in the liquefied petroleum is relatively complex, and the sulfides have higher sulfide content compared with fuels such as natural gas, and the sulfides are difficult to remove completely by adopting a conventional treatment method. When the petroleum is used as fuel of equipment such as automobiles, after the sulfide is combusted at an engine of the equipment such as the automobiles, part of the sulfide is formed into sulfur oxide which is discharged into the atmosphere to pollute the air, part of the sulfide is generated into residues such as sulfur and the like which are accumulated in an evaporator to corrode a diaphragm and an air supply pipeline of the evaporator, and a large amount of sulfur can generate serious corrosion and damage effects on an air supply system and an engine combustion system of a vehicle, thereby directly threatening the driving safety.
In the prior art, zinc oxide, titanium oxide and other materials are mostly used as catalysts to adsorb sulfides such as sulfur dioxide in liquefied petroleum, and in order to improve the desulfurization effect of the catalysts, the zinc oxide, titanium oxide and other catalyst materials need to be nanocrystallized, please refer to the document "preparation and application of nano catalysts", special journal of nano technology, p.134-139 (2001), which discloses that zinc oxide particles can adsorb sulfides such as sulfur dioxide in liquefied petroleum, and if nano zinc oxide is used as a catalyst for adsorption, the adsorption efficiency is higher and the thermal stability is stronger than that of the traditional zinc oxide particles. However, after the above-mentioned zinc oxide catalyst material is made into a nano-grade form, the channel phenomenon is easily generated in the absorption tower due to the poor accumulation thereof, so that the actual contact area is reduced, so that the catalyst material is often adsorbed on other porous carriers, such as alumina, silica, zeolite, etc. For example, chinese patent application No. 95103489.8 discloses a durable adsorbent containing zinc oxide for desulfurizinga gas, which uses zinc oxide as a catalyst, titanium dioxide as a diluent, and silica gel with large surface area as a carrier and a binder.
As described above, when the catalyst is adsorbed on the porous carrier, the effective catalytic area of the catalyst is limited by the accumulation of the catalyst on the surface of the porous carrier, the effective catalytic area cannot be ensured, the additional carrier is added, the process is complicated, the cost is increased, and the purification cost of the zinc oxide catalyst after poisoning is also relatively increased by the separation process between the zinc oxide catalyst and the porous carrier.
In view of the above, it is desirable to provide a catalyst with low cost and high effective catalytic area and an absorption tower using the same.
[ summary of the invention]
In order to solve the problems of low effective catalytic area and high cost of the catalyst for petroleum purification in the prior art, the invention aims to provide the catalyst with low cost and high effective catalytic area.
Another object of the present invention is to provide an absorption column using the above catalyst.
In order to achieve the purpose of the invention, the invention provides a catalyst for petroleum purification, which comprises a plurality of nano zinc oxide tubes, wherein the thickness of the tube wall and the inner diameter of each nano zinc oxide tube are nano or micron.
In order to achieve another object of the present invention, there is provided an absorption tower for petroleum purification comprising: the liquid inlet and the liquid outlet are respectively positioned at one side above and one side below the non-desulfurization area of thetower body and are oppositely arranged; the air inlet and the air outlet are respectively positioned at the bottom end and the top end of the tower body; a plurality of desulfurization units are arranged in a desulfurization area in the tower body at intervals, and each desulfurization unit is in sealing contact with the inner wall of the tower body; the desulfurization unit comprises a catalyst layer and a partition plate, wherein the catalyst layer comprises a plurality of nano zinc oxide tubes, the tube wall thickness and the inner tube diameter of each nano zinc oxide tube are both nano-scale or micron-scale, the partition plate is provided with a plurality of micropores, and the inner diameters of the micropores are smaller than the outer diameters of the nano zinc oxide tubes.
Compared with the prior art, the invention selects the nano zinc oxide tube as the catalyst for petroleum purification, and the channel phenomenon caused by poor accumulation can be prevented and the effective catalytic area of the catalyst can be improved due to the self hollow structure of the nano zinc oxide tube, so that the catalytic desulfurization effect on the liquefied petroleum is greatly enhanced; the method omits an indispensable catalyst carrier in the prior art, has simple process and reduces the cost; in addition, even if the zinc oxide catalyst is poisoned, the separation step between the catalyst and the carrier in the prior art is not needed, and the purification cost is correspondingly reduced. In addition, the absorption tower provided by the invention can obtain a higher effective catalytic area of the catalyst due to the use of the catalyst, and is beneficial to the desulfurization reaction, so that the absorption tower has better desulfurization efficiency on the liquefied petroleum.
[ description of the drawings]
FIG. 1 is a schematic diagram of an absorption column according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of the arrangement of nano zinc oxide tubes in a dispersed form on a separator according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of nano zinc oxide tubes arranged in an array on a separator according to an embodiment of the present invention.
[ detailed description]embodiments
Referring to fig. 1, an absorption tower 1 for oil purification used in a preferred embodiment of the present invention includes: the tower body 8, the liquid inlet 2 and the liquid outlet 3 are respectively positioned at one side above and one side below the non-desulfurization area of the tower body 8 and are oppositely arranged; the air inlet 4 and the air outlet 5 are respectively positioned at the bottom end and the top end of the tower body 8; a plurality of desulfurization units 9 are arranged at intervals in a desulfurization area 16 in the tower body 8, and each desulfurization unit 9 is in sealing contact with the inner wall of the tower body 8.
Referring to fig. 2 and 3, the desulfurization unit 9 includes a catalyst layer 6 and a partition 7, the catalyst layer 6 includes a plurality of nano-zinc oxide tubes 10, the nano-zinc oxide tubes 10 are hexagonal zinc oxide tubes, the wall thickness and the inner diameter of each nano-zinc oxide tube are nano-sized or micro-sized, and the partition 6 has a plurality of micropores, the inner diameter of each micropore is smaller than the outer diameter of the nano-zinc oxide tube 10, so as to prevent the nano-zinc oxide tube 10 thereon from leaking out of the partition 7. The preparation method of the desulfurization unit 9 comprises the following steps: the nano zinc oxide tube 10 made by magnetron sputtering method or chemical vapor deposition method is directly stacked on the partition plate 7 (refer to fig. 2), and the flow channel of the catalyst layer 6 during liquefied petroleum desulfurization can be ensured due to the tubular hollow structure of the nano zinc oxide tube 10; or the nano zinc oxide tubes 10 are directly deposited on the partition plate 7 by magnetron sputtering or chemical vapor deposition (see fig. 3), and the hollow structure of the nano zinc oxide tubes 10 regularly arranged can ensure a flow channel for desulfurization of liquefied petroleum, thereby preventing abnormal accumulation.
When the desulfurization unit 9 is disposed in the desulfurization region 16 of the absorption tower 1, the liquefied petroleum to be desulfurized can flow along the inner and outer sides of the pipe wall of the nano zinc oxide pipe 10, and is desulfurized through the catalytic action of zinc oxide, thereby preventing the channel phenomenon caused by poor catalyst accumulation in the prior art, ensuring the actual contact reaction area, and improving the actual desulfurization efficacy of the absorption tower 1.
When the absorption tower 1 carries out desulfurization work, the liquefied petroleum is introduced from the liquid inlet 2, and the liquefied petroleum flows downwards under the action of self gravity; in desulfurization zone 16, sulfur dioxide (SO) in the petroleum is liquefied2) The sulfides react with the zinc oxide (ZnO) in the catalyst layer 6 to desulfurize, and the catalyst is vulcanized; the desulfurized liquefied petroleum flows to the liquid outlet 3 and flows out of the absorption tower 1. The desulfurization reaction carried out in desulfurization zone 16 is as follows:
at the same time as the desulfurization, the catalyst layer 6 may be regenerated by introducing hydrogen gas into the gas inlet 4, the hydrogen gas flowing upward the absorption tower 1 because of its density lower than that of air, reducing the sulfided catalyst (not shown) to zinc oxide at the desulfurization zone 16, and reacting the hydrogen sulfide (H) produced2S) flows to the upper part of the absorption tower 1 together with the hydrogen flow because the density of the S) is less than that of the air, and then flows out of the absorption tower 1 from the air outlet 5. The regeneration reaction of the catalyst layer 6 occurs as follows:
the desulfurization operation of the absorption tower 1 and the regeneration operation of the catalyst may be performed simultaneously, or the liquefied petroleum may be introduced into the liquid inlet 2 and then the hydrogen gas may be introduced into the gas inlet 4, or the liquefied petroleum may be introduced into the liquid inlet 2 after the hydrogen gas is introduced into the gas inlet 4. Thereby completing the regenerative desulfurization work of the absorption tower 1.
Claims (9)
1. A catalyst for petroleum purification, characterized in that: the catalyst comprises a plurality of nano zinc oxide tubes.
2. The catalyst for petroleum purification according to claim 1, characterized in that: the thickness of the tube wall and the inner diameter of the nano zinc oxide tube are both nano-scale or micron-scale.
3. The catalyst for petroleum purification according to claim 1, characterized in that: the plurality of nano zinc oxide tubes are arranged in a dispersed manner.
4. The catalyst for petroleum purification according to claim 1, characterized in that: the plurality of nano zinc oxide tubes are regularly arranged in an array.
5. An absorption column for petroleum purification, comprising: the liquid inlet and the liquid outlet are respectively positioned at one side above and one side below the non-desulfurization area of the tower body and are oppositely arranged; the air inlet and the air outlet are respectively positioned at the bottom end and the top end of the tower body; the plurality of desulfurization units are arranged in a desulfurization area in the tower body at intervals, and each desulfurization unit is in sealing contact with the inner wall of the tower body; the method is characterized in that: the desulfurization unit comprises a catalyst layer and a separator, wherein the catalyst layer comprises a plurality of nano zinc oxide tubes, and the separator is provided with a plurality of micropores.
6. The absorption column for petroleum purification according to claim 5, wherein: the thickness of the tube wall and the inner diameter of the nano zinc oxide tube are both nano-scale or micron-scale.
7. The absorption column for petroleum purification according to claim 5, wherein: the plurality of nano zinc oxide tubes are arranged on the partition plate in a dispersed manner.
8. The absorption column for petroleum purification according to claim 5, wherein: the plurality of nano zinc oxide tubes are formed on the partition board in an array in regular arrangement.
9. The absorption column for petroleum purification according to claim 5, wherein: the inner diameters of a plurality of micropores of the separator are all smaller than the outer diameter of the nano zinc oxide tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101125913A CN100500282C (en) | 2003-12-11 | 2003-12-11 | Use of nano zinc oxide tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101125913A CN100500282C (en) | 2003-12-11 | 2003-12-11 | Use of nano zinc oxide tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1626624A true CN1626624A (en) | 2005-06-15 |
| CN100500282C CN100500282C (en) | 2009-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101125913A Expired - Fee Related CN100500282C (en) | 2003-12-11 | 2003-12-11 | Use of nano zinc oxide tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100500282C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111558400A (en) * | 2020-05-07 | 2020-08-21 | 朱岳军 | Catalyst porous ceramic carrier with high surface area |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5494880A (en) * | 1994-03-23 | 1996-02-27 | The United States Of America As Represented By The United States Department Of Energy | Durable zinc oxide-containing sorbents for coal gas desulfurization |
| CN1051025C (en) * | 1995-02-17 | 2000-04-05 | 段忠善 | Catalyst for purifying waste industrial gas and exhausted gas of automobile |
-
2003
- 2003-12-11 CN CNB2003101125913A patent/CN100500282C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111558400A (en) * | 2020-05-07 | 2020-08-21 | 朱岳军 | Catalyst porous ceramic carrier with high surface area |
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| Publication number | Publication date |
|---|---|
| CN100500282C (en) | 2009-06-17 |
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