CN102019161A - Multichannel photocatalysis reaction device - Google Patents
Multichannel photocatalysis reaction device Download PDFInfo
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- CN102019161A CN102019161A CN2009101531149A CN200910153114A CN102019161A CN 102019161 A CN102019161 A CN 102019161A CN 2009101531149 A CN2009101531149 A CN 2009101531149A CN 200910153114 A CN200910153114 A CN 200910153114A CN 102019161 A CN102019161 A CN 102019161A
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Abstract
The invention discloses a multichannel photocatalysis reaction device, which comprises a light source system, a reaction system and a cooling system, and is characterized in that: the light source system consists of N tubular light sources (N is an integer more than 1); the reaction system consists of M transparent reaction tubes (M is an integer more than 1); and the N tubular light sources uniformly enclose the M transparent reaction tubes. The multichannel photocatalysis reaction device also can further comprise a distribution system connected with the reaction system.
Description
Technical field
The invention belongs to the multi-channel reaction device field, particularly a kind of multi-channel reaction device that is used for light-catalyzed reaction.
Background technology
In photocatalysis field, the fields such as organic matter harmful as photocatalytic degradation, usually need multiple catalyst is screened, seek active higher catalyst, on the other hand, when a certain definite catalyst is studied, also often need study, to find the rule that it is inherent and to reach the purpose of optimizing reaction condition to its concrete reaction condition.To the general method of reacting one by one in same reactor that adopts of these researchs, the shortcoming of this method maximum is to waste time and energy traditionally, the waste resource, and also the condition of each reaction is difficult to control in full accord, and the reappearance of reaction is relatively poor.
Along with the appearance of combinatorial chemistry, this problem has obtained good solution.Combinatorial chemistry high flux reaction unit can carry out a plurality of chemical reactions simultaneously under identical reaction condition, improved the efficient of research greatly, has also improved the accuracy of research simultaneously.In the last few years, along with the photocatalytic degradation research extensive use in air pollution and water pollute, the research of light-catalyzed reaction was also become the focus in catalyticing research field, for high-throughout photocatalysis research method has been brought bigger demand.
Chinese patent application " a kind of multi-channel reaction device of fast appraisement of hydrogen manufacturing performance of photocatalyst " (application number is 200710099875.1) discloses a kind of multichannel photocatalytic reaction device, this device has only single tubular type light source, the a plurality of quartz ampoules that constitute reaction system be evenly distributed on the tubular type light source around, what the rotation by the motor that is connected with the tubular type light source guaranteed reaction tube is subjected to light even.But this device only is applicable to the liquid-solid phase catalytic reaction, and for fixed bed reactors, because catalyst has stopped passing through of light in the fixed bed, the opposite side relative with light source then can not get sufficient illumination in the reactor, makes light-catalyzed reaction well not carry out.
Chinese patent application " visible light photoactivated photochemical catalyst and lamp arraying type packed bed reaction unit " (application number is 200510063617.9) discloses a kind of lamp arraying type and has filled the fixed bed photocatalytic reaction device, it adopts lamp arraying type uviol lamp arrangement method, and catalyst is filled in the tubulation gap of fluorescent tube composition.Though this method can make catalyst obtain sufficient illumination, its lamp places and is arranged in reactor in the glass bushing then, does not take any cooling provision, is difficult to get rid of the influence that thermocatalytic is brought reaction in the test process of catalytic reaction; And it once can only test a kind of catalyst.
Summary of the invention
The object of the present invention is to provide a kind of multi-channel reaction device that is applied to light-catalyzed reaction, this device goes for the catalytic reaction of number of different types, can provide evenly and the illumination of sufficient intensity for reaction.
For achieving the above object, multichannel light catalyst reaction device of the present invention, comprise light-source system, reaction system and cooling system, its kind light-source system is made up of N tubular type light source, N is the integer greater than 1, reaction system is made up of the reaction tube of M printing opacity, and M is the integer greater than 1, and N tubular type light source evenly is centered around around the reaction tube of M printing opacity.
According to different reaction requirement, can select different light sources, also can reach selection between light-source system and reaction system by optical filter is set to light source.The replacing of optical filter for convenience, the Position Design that is connected with reaction system at light-source system has a plurality of draw-in grooves, its size, thickness conform to size, the thickness of optical filter, after each draw-in groove all placed identical optical filter, can make all light that send by the light source mating plate after filtration all that arrives reaction system.In order to realize identical purpose, also can adopt a columnar water jacket, the solution that can absorb special wavelength light of packing in the water jacket reaches the effect of optical filtering, can filter out ultraviolet light below the 400nm wavelength such as sodium nitrite solution.The tubular type light source can be selected according to the demand of reaction, and such as mercury lamp, xenon lamp etc., usually, the tubular type light source is preferably used mercury lamp.
Owing to comprised N tubular type light source in the light-source system, so light source can produce a large amount of heat in course of reaction, on the one hand in order to reduce the influence of thermocatalytic that high temperature may cause as far as possible to light-catalyzed reaction, too high on the other hand temperature brings danger also may for the use of tubular type light source (as mercury lamp), so need cooling system that most of heat that the tubular type light source produces is taken away.Cooling system can be for being distributed in L the fan (L is a positive integer) of light-source system and reaction system below, at this moment, the upper and lower of light-source system and reaction system all is non-closed state (such as being distributed with many ventilative holes on the upper and lower panel), is beneficial to the circulation of air.If only use a fan, it can place the middle position of light-source system and reaction system below; If use a plurality of fans, then be arranged in the below of light-source system and reaction system equably.Certainly, also can use other any devices that can produce wind to replace fan, such as directly using compressed air to dry.Cooling system also can reach the purpose of temperature in the reduction reaction unit for being distributed in tubular type light source circulating fluid cooling device on every side by the circulation of cooling liquid.When if the tubular type quantity of light source is many, the heat that produces is bigger, in order to reach best cooling effect, cooling system can be the combination that is distributed in L the fan (L is a positive integer) of light-source system and reaction system below and is distributed in tubular type light source circulating fluid cooling device on every side.
In order to provide evenly and the light of sufficient intensity to reactor, the number N of tubular type light source is preferably greater than 2.
In order to provide evenly and the light of sufficient intensity to reactor, the number N of tubular type light source preferably equals the integral multiple of M.
Reaction system is the reaction tube of M printing opacity in the multichannel light catalyst reaction device of the present invention, and reaction tube can be the fixed-bed tube reactor or the fluid bed tubular reactor of upper and lower opening, can be the tubular reactor of lower end closed.In order to reach translucent effect preferably, select quartz tube reactor usually for use.
In order to obtain better optical uniformity, can adopt round the light-source system of reaction system uniform rotation.N tubular type light source is fixed on equably on the round rail of an annular (power supply of tubular type light source connects by brush), the circle rail is supported by minimum three equally distributed rollers, be connected with motor on one of them roller, the round rail that is fixed with N tubular type light source by driven by motor roller and then drive rotates, and obtains an at the uniform velocity light-source system of rotation.
For fear of stronger light other objects outside human body and the reaction unit are caused unnecessary influence, outside light-source system and reaction system, be with a lighttight barrel-shaped shell, it can disclose shape, the barrel-shaped shape in side or other shapes for circle, for the circulation that guarantees air to obtain better cooling effect, the below of barrel-shaped shell is an opening-wide state, the top of barrel-shaped shell can be complete opening-wide state, also can use the top cover that has porous to reduce leaking outside of light.In order to reach better cooling effect, barrel-shaped shell adopts heat-conducting effect preferred metal material to make.
The invention still further relates to a kind of multichannel light catalyst reaction device, comprise light-source system, reaction system, cooling system and separate system, it is characterized in that light-source system forms (N for greater than 1 integer) by N tubular type light source, reaction system is made up of the reaction tube of M printing opacity that (M is for greater than 1 integer, this moment, reaction tube was the fixed-bed tube reactor or the fluid bed tubular reactor of upper and lower opening), N tubular type light source is evenly distributed on around the reaction tube of M printing opacity, separate system is the current divider of a M passage, and the M of current divider outlet is connected with the inlet of the reaction tube of M printing opacity respectively.
Above-mentioned current divider comprises top cover, a M shunting cylinder, base plate, fluid delivery line and fit sealing spare, in each shunting cylinder independent flow control device is arranged all, flow control device comprises the compression set of porous plate, elastic filler and elasticity of compression filler, described compression set can constitute described elastic filler preferred elastomeric bead for hollow screw, hollow ram.
When adopting fixed bed or fluid bed pipe reaction pipe to carry out successive reaction, fluid reactant is introduced the inlet of the current divider of M passage, be divided into M road fluid through current divider, every road flow rate of fluid can be shunted in the cylinder flow control device by each and regulate, and enters M reaction tube again from M fluid that comes out of current divider and carries out light-catalyzed reaction.So just can be implemented under the different condition (such as different in flow rate, variable concentrations etc.) light-catalyzed reaction is tested simultaneously.
Compared with prior art, the present invention has following beneficial effect:
One, multichannel light catalyst reaction device of the present invention can make reactor obtain evenly and the illumination of sufficient intensity, the differential responses pipe can be reacted under identical illumination condition simultaneously, be fit to very much the high flux screening of photochemical catalyst and the application such as condition optimizing of light-catalyzed reaction;
Two, multichannel light catalyst reaction device of the present invention can both reach effect preferably applicable to multiple different photo catalysis reactor to fixed-bed tube reactor, fluid bed tubular reactor and tank reactor;
Three, multichannel light catalyst reaction device of the present invention is simple in structure, easy to operate, can realize the high flux test of light-catalyzed reaction fast.
Description of drawings
Fig. 1-a is a kind of multichannel light catalyst reaction device schematic diagram of the present invention;
Fig. 1-b is the vertical view of the multichannel light catalyst reaction device shown in Fig. 1-a;
Fig. 2 is an another kind of multichannel light catalyst reaction device schematic diagram of the present invention;
Fig. 3 is an another kind of multichannel light catalyst reaction device schematic diagram of the present invention;
Fig. 4 is an another kind of multichannel light catalyst reaction device schematic diagram of the present invention;
Fig. 5-a is an another kind of multichannel light catalyst reaction device schematic diagram of the present invention;
Fig. 5-b is the schematic diagram of circle rail, roller etc. among Fig. 5-a;
Fig. 6 is V in the embodiment of the invention 1
2O
5-9.1wt%/MgF
2Catalyst degradation acetone reaction collimation experiment graph of a relation.
101-tubular type light source, 102-quartz tube reactor, 103-optical filter, the 104-fan, 105-catalyst, 106-draw-in groove, 107-reaction tube inlet, the outlet of 108-reaction tube, 109-shell, 110-reaction unit top panel, 111-cooling jacket, 112-current divider, the inlet of 113-current divider, 114-support, 115-circle rail, the 116-roller, the 117-motor.
The specific embodiment
Below in conjunction with Figure of description multichannel light catalyst reaction device of the present invention is described in further detail.
Technical scheme of the present invention is evenly distributed on the tubular type light source around the reaction tube array, reaction tube can be accessed evenly and the illumination of sufficient intensity, realize selection by being arranged on optical filter between light source and the reaction tube to the tubular type optical source wavelength, device has been equipped with cooling system, can select air-cooled, water-cooled or both combinations, cooling system can be taken away most of heat that light source produces, reduce temperature as far as possible and raise the thermocatalytic brought, guarantee that also the tubular type light source can trouble free service simultaneously the influence of light-catalyzed reaction.
Fig. 1-a is a kind of embodiment of multichannel light catalyst reaction device of the present invention, adopts the four-way design, and shown device comprises light-source system, reaction system, cooling system and shell.Light-source system is made up of four tubular type light sources 101 and four optical filters 103, reaction system is made up of four quartz tube reactors 102, four quartz tube reactor 102 symmetry arrangement are in the centre, four tubular type light sources 101 evenly are arranged in the periphery of four quartz tube reactors 102, separated by four optical filters 103 between four tubular type light sources 101 and four quartz tube reactors 102, make light that the tubular type light source sends after filtration mating plate could arrive quartz tube reactor, four optical filters 103 are fixing by corresponding draw-in groove on the upper and lower panel 106.Cooling system is the fan 104 that places light-source system and reaction system below, by the air blast that makes progress most of heat that four tubular type light sources 101 produce is taken away during reaction.Whole device is surrounded by columnar shell 109, plays isolated light and leaks outside, and shell 109 is made by stainless steel, promotes better to dispel the heat.
When reacting, catalyst 105 is seated in the middle part of reaction tube, fix by silica wool up and down.Open the power switch of fan 104 earlier, light four tubular type light sources 101 then, reaction gas is imported by reaction tube inlet 107, and through being derived by reaction tube outlet 108 behind the catalyst bed reaction, reaction is finished.
Fig. 1-b is the vertical view of the four-way photocatalytic reaction device shown in Fig. 1-a, and this figure can most clearly find out arranging of tubular type light source, reaction tube etc.Reaction unit top panel 110 mainly works to fix each parts, also is distributed with many louvres on the panel 110 except the hole of fixedly tubular type light source and crystal reaction tube, and panel 110 edges are connected with the shell 109 that stainless steel is made.Four quartz tube reactors 102 are arranged in panel central authorities fully symmetrically, and four tubular type light sources 103 evenly are arranged in the periphery of four quartz tube reactors 102, and each tubular type light source is all equated to the distance of immediate two quartz tube reactors.In the middle of tubular type light source and the quartz tube reactor is a foursquare draw-in groove 106, inserts optical filter in the middle of the draw-in groove, and tubular type light source and quartz tube reactor are separated fully.
Another embodiment of the invention adopts the four-way design as shown in Figure 2, and shown device comprises light-source system, reaction system, cooling system and shell.Light-source system is made up of four tubular type light sources 101 and four optical filters 103, reaction system is made up of four quartz tube reactors 102, four quartz tube reactor 102 symmetry arrangement are in the centre, four tubular type light sources 101 evenly are arranged in the periphery of four quartz tube reactors 102, separated by four optical filters 103 between four tubular type light sources 101 and four quartz tube reactors 102, make light that the tubular type light source sends after filtration mating plate could arrive quartz tube reactor, four optical filters 103 are fixing by corresponding draw-in groove on the upper and lower panel 106.Cooling system is the fan 104 that places light-source system and reaction system below, by the air blast that makes progress most of heat that four tubular type light sources 101 produce is taken away during reaction.Whole device is surrounded by columnar shell 109, plays isolated light and leaks outside, and shell 109 is made by stainless steel, promotes better to dispel the heat.
When reacting, catalyst 105 and reactant are packed in the crystal reaction tube 102 together.Open the power switch of fan 104 earlier, light four tubular type light sources 101 then, reaction begins to carry out.Can from crystal reaction tube 102, take a sample in the course of reaction and analyze.
Another embodiment of the invention adopts the four-way design as shown in Figure 3, and shown device comprises light-source system, reaction system, cooling system and shell.Light-source system is made up of four tubular type light sources 101 and four optical filters 103, reaction system is made up of four quartz tube reactors 102, four quartz tube reactor 102 symmetry arrangement are in the centre, four tubular type light sources 101 evenly are arranged in the periphery of four quartz tube reactors 102, separated by four optical filters 103 between four tubular type light sources 101 and four quartz tube reactors 102, make light that the tubular type light source sends after filtration mating plate could arrive quartz tube reactor, four optical filters 103 are fixing by corresponding draw-in groove on the upper and lower panel 106.Cooling system is the combination that places the fan 104 of light-source system and reaction system below and be arranged on four tubular type light sources 101 annular cooling water cover 111 on every side, is connected with recirculated cooling water in the annular cooling water cover 111.Whole device is surrounded by columnar shell 109, plays isolated light and leaks outside, and shell 9 is made by stainless steel, promotes better to dispel the heat.
When reacting, catalyst 105 and reactant are packed in the crystal reaction tube 102 together.Open the power switch of fan 104 earlier, open the recirculated cooling water of annular cooling water cover 111, light four tubular type light sources 101 then, reaction begins to carry out.Can from crystal reaction tube 102, take a sample in the course of reaction and analyze.
Another embodiment of the invention adopts the four-way design as shown in Figure 4, and shown device comprises light-source system, reaction system, cooling system, separate system and shell.Light-source system is made up of four tubular type light sources 101 and four optical filters 103, reaction system is made up of four quartz tube reactors 102, four quartz tube reactor 102 symmetry arrangement are in the centre, four tubular type light sources 101 evenly are arranged in the periphery of four quartz tube reactors 102, separated by four optical filters 103 between four tubular type light sources 101 and four quartz tube reactors 102, make light that the tubular type light source sends after filtration mating plate could arrive quartz tube reactor, four optical filters 103 are fixing by corresponding draw-in groove on the upper and lower panel 106.Cooling system is four fans 104 that place the light-source system below, by the air blast that makes progress most of heat that four tubular type light sources 101 produce is taken away during reaction.The inlet 107 of four quartz tube reactors 102 is connected respectively with four outlets of current divider 112, and whole device is surrounded by columnar shell 109, plays isolated light and leaks outside, and shell 109 is made by stainless steel, promotes better to dispel the heat.
When reacting, catalyst 105 is seated in the middle part of reaction tube, fix by silica wool up and down.Open the power switch of fan 104 earlier, light four tubular type light sources 101 then, reaction gas is imported by the inlet 113 of current divider 112, enter quartz tube reactor 102 through current divider shunting back by reactor inlet 107, through being derived by crystal reaction tube outlet 108 behind the catalyst bed reaction, reaction is finished.
Another embodiment of the invention adopts the four-way design shown in Fig. 5-a, shown device comprises light-source system, reaction system, cooling system, separate system and shell.Light-source system is made up of four tubular type light sources 101, annular circle rail 115, four rolling 116, motor 117 and four optical filters 103, four tubular type light sources 101 are fixed on the round rail 115 of an annular equably, the circle rail is supported by four equally distributed rollers 116, roller 116 is fixed on the shell 109, one of them roller is connected with motor 117, is fixed with round rail 115 rotations of tubular type light source 101 by driven by motor roller and then drive; Reaction system is made up of four quartz tube reactors 102, four quartz tube reactor 102 symmetry arrangement are in the centre, separated by four optical filters 103 between four tubular type light sources 101 and four quartz tube reactors 102, make light that the tubular type light source sends after filtration mating plate could arrive quartz tube reactor, four optical filters 103 are fixing by corresponding draw-in groove on the upper and lower panel 106.The system that is made of reaction tube and optical filter is fixed on the lower panel of device by support 114.Cooling system is four fans 104 that place the light-source system below, by the air blast that makes progress most of heat that four tubular type light sources 101 produce is taken away during reaction.Whole device is surrounded by columnar shell 109, plays isolated light and leaks outside, and shell 109 is made by stainless steel, promotes better to dispel the heat.
Fig. 5-b is the schematic diagram of circle rail among Fig. 5-a, and as shown in the figure, four tubular type light sources 101 evenly are arranged on the round rail 115 of annular, and circle rail 115 is placed on the four rolling 116.
When reacting, catalyst 105 is seated in the middle part of reaction tube, fix by silica wool up and down.Open the power switch of fan 104 earlier, light four tubular type light sources 101 then, open motor 117 switches, make light source begin rotation, in reaction tube 102, feed reactant and begin reaction.
Below with V
2O
5-9.1wt%/MgF
2Catalyst degradation acetone is that the present invention will be described in detail for example.Adopt four-way photocatalytic reaction device as shown in Figure 5 to test, the tubular type light source adopts four high-pressure sodium lamps, and power is 375W, reaction tube adopting quartz glass reaction tube (ID 9.0mm, OD 14mm).Catalyst adopts homemade V
2O
5-9.1wt%/MgF
2Catalyst fills in the middle part of quartz glass reaction pipe, and with the silica wool filling, loadings is 5.0g up and down.Use optical filter to filter out the light of wavelength below 320nm.The next door of each reaction tube all is provided with thermocouple, and the temperature of detection reaction is controlled reaction temperature and carried out in 5 degree scopes in real time.Reactant acetone carries it into reaction tube in the mode of bubbling with the oxygen of constant flow rate, the tool that acetone is housed is propped up in the ice-water bath that test tube is placed on constant temperature the constant concentration of control acetone.Current divider adopts homemade four-way fluid diverter, and identical through demarcating the four-way flow, error range is in ± 1%.Before the reaction beginning, first aerating oxygen (not blasting acetone), flow set are 30mL/min, check the air-tightness of whole system, and no gas leak phenomenon exists.Open fan successively, bright four high-pressure sodium lamps of electricity feed the tool that acetone is housed with oxygen (flow 30mL/min) and prop up test tube, and the Oxygen Flow that contains finite concentration acetone then is split into four the tunnel through current divider, enters four crystal reaction tubes respectively and reacts.Reaction beginning back timing sampling is analyzed the degradation rate of acetone, uses gas-chromatography (HP-PLOT/Q post) to analyze.Because high-pressure sodium lamp can be emitted a spot of ozone in use, entire reaction is carried out in ventilating kitchen.
Timing sampling is analyzed the degraded situation of acetone in the course of reaction, acetone degradation rate data test result in A, B, four reaction tubes of C, D can be clear that very that from figure four reaction channels of this device have good uniformity when Fig. 6 had provided reaction one hour and three hours.Therefore, this device can satisfy the requirement of under the same conditions different catalysts being screened or catalystic converter system being estimated etc. fully.
Claims (16)
1. multichannel light catalyst reaction device, comprise light-source system, reaction system and cooling system, it is characterized in that light-source system forms (N for greater than 1 integer) by N tubular type light source, reaction system is formed (M is the integer greater than 1) by the reaction tube of M printing opacity, and N tubular type light source evenly is centered around around the reaction tube of M printing opacity.
2. multichannel light catalyst reaction device according to claim 1 is characterized in that being provided with optical filter between light-source system and the reaction system.
3. multichannel light catalyst reaction device according to claim 2 is characterized in that the tubular type light source is mercury lamp or xenon lamp.
4. multichannel light catalyst reaction device according to claim 1 is characterized in that light-source system is the light-source system round the reaction system uniform rotation.
5. multichannel light catalyst reaction device according to claim 1 is characterized in that cooling system is L the fan (L is a positive integer) that is distributed in light-source system and reaction system below.
6. multichannel light catalyst reaction device according to claim 1 is characterized in that cooling system is to be distributed in tubular type light source circulating fluid cooling device on every side.
7. multichannel light catalyst reaction device according to claim 1 is characterized in that cooling system is L the fan (L is a positive integer) that be distributed in light-source system and reaction system below and be distributed in combining of tubular type light source circulating fluid cooling device on every side.
8. multichannel light catalyst reaction device according to claim 1 is characterized in that N is greater than 2.
9. multichannel light catalyst reaction device according to claim 1 is characterized in that N is the integral multiple of M.
10. multichannel light catalyst reaction device according to claim 1 is characterized in that light-source system and reaction system are with a lighttight barrel-shaped shell outward.
11. multichannel light catalyst reaction device according to claim 1 is characterized in that described reaction tube is the fixed-bed tube reactor or the fluid bed tubular reactor of upper and lower opening.
12. multichannel light catalyst reaction device according to claim 1 is characterized in that described reaction tube is the tubular reactor of lower end closed.
13. according to each described multichannel light catalyst reaction device of claim 1-11, further comprise separate system, described separate system is the current divider of a M passage, the M of current divider outlet is connected with the inlet of M reaction tube respectively.
14. multichannel light catalyst reaction device according to claim 13, it is characterized in that described current divider comprises top cover, a M shunting cylinder, base plate, fluid delivery line and fit sealing spare, in each shunting cylinder independent flow control device is arranged all, flow control device comprises porous plate, elastic filler and is used for the compression set of elasticity of compression filler.
15. multichannel light catalyst reaction device according to claim 14 is characterized in that described compression set comprises hollow screw, hollow ram.
16. multichannel light catalyst reaction device according to claim 14 is characterized in that described elastic filler is an elastic pellet.
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Application publication date: 20110420 |