CN106237953B - The small gas-liquid bubble column reactor of photocatalysis - Google Patents
The small gas-liquid bubble column reactor of photocatalysis Download PDFInfo
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- CN106237953B CN106237953B CN201610813934.6A CN201610813934A CN106237953B CN 106237953 B CN106237953 B CN 106237953B CN 201610813934 A CN201610813934 A CN 201610813934A CN 106237953 B CN106237953 B CN 106237953B
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- quartz ampoule
- shaped threeway
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- photocatalysis
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 32
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 title claims abstract description 27
- 239000003708 ampul Substances 0.000 claims abstract description 38
- 239000010453 quartz Substances 0.000 claims abstract description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000004744 fabric Substances 0.000 claims abstract description 21
- 239000003054 catalyst Substances 0.000 claims abstract description 10
- 230000005587 bubbling Effects 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 7
- 238000000520 microinjection Methods 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 19
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 12
- 229960000907 methylthioninium chloride Drugs 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- 238000012546 transfer Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 229910052724 xenon Inorganic materials 0.000 description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000002032 lab-on-a-chip Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011943 nanocatalyst Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000007794 visualization technique Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0093—Microreactors, e.g. miniaturised or microfabricated reactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00781—Aspects relating to microreactors
- B01J2219/00819—Materials of construction
- B01J2219/00835—Comprising catalytically active material
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses the small gas-liquid bubble column reactor of photocatalysis, including quartz ampoule and gas distributor, it is immobilized on quartzy inside pipe wall to have catalyst film, gas distributor includes T-shaped threeway, screen cloth is adhesively fixed with the top exit of T-shaped threeway, needle tubing is vertically provided among pipe in the VERTICAL TUBE of T-shaped threeway, connected between the bottom of quartz ampoule and the VERTICAL TUBE top of T-shaped threeway with groove tube, groove tube includes the groove for being opened in groove tube internal upper part, the interstitial hole of through-going recess is provided with the centre of the bottom wall of groove, the bottom of quartz ampoule is fixed in groove, the VERTICAL TUBE top of T-shaped threeway is inserted in interstitial hole, expanding reach is provided with the top of quartz ampoule, liquid outlet is provided with expanding reach, light source is provided with front of quartz ampoule, the rear of quartz ampoule is provided with Parabolic reflection shield.Stable bubble flow is formd using the present invention, significantly improves mass tranfer coefficient.
Description
Technical field
The present invention relates to photocatalysis technology field, more particularly to the small solution-air bubbling column reactor of photocatalysis and its gas
Distributor technology.
Background technology
Microreactor has been applied to photocatalysis field immediately since the 1990s comes out.Photocatalysis microreactor
Characteristic size below 1mm (Chem.Eng.Sci., 2001, (56):293-303), it has many advantages, such as Gao Bibiao
Area (>10000m2/m3), (Lab on a Chip, 2001,1 (1) such as high mass transfer and rate of heat transfer, uniform illumination decay be small:
22-28；AIChE J.,2007,53(3):695-700；Chem.Eng.J.,2008,135(4):S303-S308).But it
Also there is the shortcomings that some are obvious.First, compared with the catalyst granules of suspension, it is supported on the phase of the catalyst of microchannel inner surface
Interfacial area very little；Second, the characteristic size of microreactor determines that it is very small by the area of illumination, the processing of single microchannel
Ability is very limited (generally<100μL·min-1).(Jin Litong etc., East China are pedagogical big by Chinese patent CN200610029643.4
, capillary tube array photo catalysis reactor and its preparation and application), Chinese patent 200910197401.X (Wang Hongzhi etc., east China
University, the microchannel type photocatalytic microreactor based on nanometer stick array and preparation method thereof) and 201010148412.1 (still gold
Hall etc., Southeast China University, the preparation method of photocatalysis microreactor) all using microchannel as conversion zone, it is small light-receiving area to be present,
Single microchannel treating capacity is low, parallel to amplify the problems such as difficult.(Ma Xiaoxun etc., northwest is big for Chinese patent 201210051512.1
Learn, optically catalytic TiO 2 microreactor) a kind of mode of parallel amplification is provided, but light be present in the passage using optical fiber as light
The limitation of effective propagation distance (AIChE is J.2006,52 (6):2271-2280), or the complicated built in light of setting structure is needed
Source, simultaneous reactions device are intermittently operated etc..It is micro- anti-that Chinese patent CN201410415832.X has invented a kind of flat photocatalysis
Device is answered (Liu Mingyan etc., University Of Tianjin, to have in the board-like photocatalysis microreactor of titanium dioxide and reactor of metal ion mixing and urge
The preparation method of agent film), its disposal ability has to be strengthened.
The photocatalysis bubbling column reactor of macro-scale also has lot of advantages, and for example, reactant mixes with catalyst
Even, mass transfer and rate of heat transfer are high, effective illuminating area is big, quantum efficiency is high (Chem.Eng.Sci., 2008,63:4228-
4238；Appl.Catal.B,2007,69:189-195；Chem.Eng.Sci.,2000,55:5089-5098).But it is lacked
Point is also evident from.First, existing bubbling column reactor (Chinese patent CN200610012622.1, Hao Xiao just etc., Taiyuan reason
Work university, labyrinth type cross-flow bubbling photocatalytic reaction device and its method for processing organic wastewater；CN201410281510.0, Xu Zhong
Equalization, Beijing University of Chemical Technology, a kind of liquid phase photocatalytic indoor air purifier；CN201520247995.1, Gao Liang army etc., Zhejiang
Oceanography institute, light-catalyzed reaction bubbling mechanism), its characteristic size is typically in more than 5cm.Because macroscopical photocatalysis bubble tower reacts
The characteristic size of device is larger, and decay is serious when light passes through solution or catalyst granules, and this can cause catalytic efficiency low, reaction solution
Body needs to circulate, reaction time length (>1h) etc..Second, although the nano-catalyst particles effect commonly used in such reactor is good,
Difficult separation and recycling and cost height.
In view of above-mentioned photo catalysis reactor has some limitations, industrialization has larger difficulty, and this technology invention is led to
Cross and manufacture and design rational reactor size and structure, reactor is both combined the excellent of microreactor and macroscopical bubbling column reactor
The shortcomings of point, while overcome microreactor treating capacity small again, macroscopical bubbling column reactor reaction time are long, and with higher flat
Equal reaction rate.
The content of the invention
It is an object of the invention to provide a kind of characteristic size between microreactor and macroscopical bubbling column reactor,
Reaction time is short, and treating capacity is larger, and the light with higher average response speed (reacting dose in the unit volume unit interval) is urged
Change small bubbling column reactor.
The small solution-air bubbling column reactor of photocatalysis of the present invention, including quartz ampoule and gas distributor, in described stone
Immobilized on English inside pipe wall to have catalyst film, described gas distributor includes T-shaped threeway, at the top of described T-shaped threeway
Exit is adhesively fixed with screen cloth, needle tubing is vertically provided among pipe in the VERTICAL TUBE of described T-shaped threeway, institute
The top face screen cloth for the needle tubing stated sets and be 1-3mm with the distance of screen cloth, the bottom of described needle tubing and T-shaped threeway
Sealing structure is provided between vertical bottom of the tube, with recessed between the bottom of described quartz ampoule and the VERTICAL TUBE top of T-shaped threeway
Barrel connects, and described groove tube includes the groove for being opened in groove tube internal upper part, is provided with the centre of the bottom wall of described groove
The interstitial hole of through-going recess, the bottom of described quartz ampoule are fixed in groove, and the VERTICAL TUBE top of described T-shaped threeway is inserted in
In interstitial hole, it is provided between the outer wall on the bottom for the quartz ampoule being connected with groove tube and the VERTICAL TUBE top of T-shaped threeway
Fluid sealant to seal, gas micro-injection pump be connected by gas pipeline with the bottom inlet of the vertical pipeline section of T-shaped threeway with
Gas is conveyed, micro-amounts of liquids syringe pump is connected to convey liquid by fluid pipeline with the entrance of the horizontal pipeline section of T-shaped threeway,
Expanding reach is provided with the top of described quartz ampoule, liquid outlet, described liquid discharge are provided with described expanding reach
Mouth is connected with outlet line so that reacted liquid flows out, and light source is provided with front of described quartz ampoule, described
The rear of quartz ampoule is provided with Parabolic reflection shield, and described Parabolic reflection shield can project light source parallel
Light is gathered in the focus of reflection shield, and the axis of described quartz ampoule overlaps with the focus of reflection shield, the length of described reflection shield
Degree is bigger than the length of quartz ampoule, and the internal diameter of described needle tubing is 0.06-0.34mm, and the aperture of described screen cloth is 0.031-
0.074mm。
Using the beneficial effects of the invention are as follows：
(1) gas distributor can be by the diameter d of bubble in the small solution-air bubbling column reactor of photocatalysisbFrom common drum
Several millimeters or even several centimeters of bubble tower distributor are reduced to 50-900 μm, mass transfer area is improved an order of magnitude.In Novel air
Stable bubble flow is formd under the effect of body distributor, slug flow common in general gas-liquid microreactor is avoided, makes reaction
Flow regime in device becomes turbulent flow by laminar flow, significantly improves mass tranfer coefficient.The increase of mass transfer area and mass tranfer coefficient is big
Big accelerates reaction rate.
(2) characteristic size of the small solution-air bubbling column reactor of photocatalysis is 1-10mm, is roused between microreactor and macroscopic view
Between bubble tower reactor.Compared with microreactor, it the increase of characteristic size, can significantly improve the treating capacity of reactor；With it is grand
See bubbling column reactor to compare, the reduction of characteristic size, significantly reduce stop and solution of the catalyst granules to light to light
The absorption of line, making intensity of illumination, decay is small than more uniform.
(3) the average response speed of the small solution-air bubbling column reactor of photocatalysis approaches with microreactor, with macroreaction
Device, which is compared, can improve two orders of magnitude, meanwhile, its reaction time is several minutes, far below a few hours of macroreaction device.Therefore
Be it is a kind of very efficiently, while the photo catalysis reactor that treating capacity is relatively large.
Brief description of the drawings
Fig. 1 is the reaction unit schematic diagram of the small solution-air bubbling column reactor of photocatalysis of the present invention；
Fig. 2 is that the longitudinal direction of the gas distributor in the small solution-air bubbling column reactor of photocatalysis shown in Fig. 1 of the present invention is cut
Face enlarged diagram；
Fig. 3 is the degradation rate of MB solution in small solution-air bubbling column reactor.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
The small solution-air bubbling column reactor of photocatalysis of the invention as shown in Figure 1, it includes quartz ampoule 5 and gas point
Cloth device 6, it is immobilized on the described inwall of quartz ampoule 5 to have catalyst film, the preparation of catalyst film and carrying method using existing
There are method, such as sol-gal process, liquid phase deposition, the preferable described internal diameter of quartz ampoule 5 is 1-10mm.Described gas
Body distributor 6 includes T-shaped threeway 9, and screen cloth 7 is adhesively fixed with the top exit of described T-shaped threeway 9, described T-shaped
Needle tubing 8 is vertically provided with the VERTICAL TUBE of threeway 9 among pipe, the top face screen cloth of described needle tubing 8 is set simultaneously
And with the distance of screen cloth 7 be 1-3mm, it is provided with sealing between the bottom of described needle tubing 8 and the vertical bottom of the tube of T-shaped threeway 9
Structure, described sealing structure can use fluid sealant, and described gas distributor can form the more of stabilization in quartz ampoule
Bubble bubble flow.Connected between the bottom of described quartz ampoule 5 and the VERTICAL TUBE top of T-shaped threeway 9 with groove tube 12, it is described
Groove tube 12 includes the groove for being opened in groove tube internal upper part, and the centre of through-going recess is provided with the centre of the bottom wall of described groove
Hole, the bottom of described quartz ampoule 5 are fixed in groove, and the VERTICAL TUBE top of described T-shaped threeway 9 is inserted in interstitial hole,
Fluid sealant is provided with close between the outer wall on the bottom for the quartz ampoule 5 being connected with groove tube and the VERTICAL TUBE top of T-shaped threeway 9
Envelope.
Gas micro-injection pump 2 be connected by gas pipeline 14 with the bottom inlet of the vertical pipeline section 10 of T-shaped threeway 9 with
Gas is conveyed, micro-amounts of liquids syringe pump 3 is connected with defeated by fluid pipeline 15 with the entrance of the horizontal pipeline section 11 of T-shaped threeway 9
Liquor charging body, the top of described quartz ampoule 5 is provided with expanding reach 13, liquid outlet is provided with described expanding reach 13
16, described liquid outlet is connected with outlet line 17 so that reacted liquid flows out, and is set in front of described quartz ampoule
Light source 1 is equipped with, Parabolic reflection shield 4, described Parabolic reflection shield are provided with the rear of described quartz ampoule
The directional light that light source 1 projects can be gathered in the focus of reflection shield, the axis of described quartz ampoule 5 and Jiao of reflection shield 4
Point overlaps.Preferable Parabolic reflection shield is made by reflective aluminium sheet, and parabolical equation is x2=40y (- 20mm≤x≤
20mm, 0≤y≤10mm, focus are (0,10mm)), wherein x-axis is vertical with the incident direction of light, and the length of reflection shield compares stone
The length of English pipe is larger.The parabola of reflection shield can have different selections, and general reflection shield is bigger, and reaction effect is got over
It is good.
The internal diameter of described T-shaped threeway 9 is 1-5mm, and can be according to the appropriate adjustment of quartz ampoule；Described needle tubing 8 it is interior
Footpath is 0.06-0.34mm, and the size for the air pocket that can ensure to be formed in needle tubing upper end within this range is not especially big；Described
The aperture of screen cloth 7 is 0.031-0.074mm, can now form 50-900 μm of minute bubbles, and gas distributor will not produce
Obvious pressure drop.
Described light source 1 can be mercury lamp, xenon lamp or sunshine.
The running of this reaction unit is as follows:
The small solution-air bubbling column reactor of photocatalysis in the process of running, the power of xenon lamp, methylene blue (MB) solution
Initial concentration C0With flow Q, the flow V of airGIt is all adjustable.Certain density MB solution is prepared first, then sets xenon lamp work(
Rate, MB liquid inventories Q and air mass flow VG.Then, micro-amounts of liquids syringe pump 3 is opened, a certain amount of MB is injected into quartz ampoule
After solution, pause micro-amounts of liquids syringe pump 3.Then, gas micro-injection pump 2 is opened, air, needle tubing 8 are passed through into distributor
The air pocket on top is rapid under the impetus of needle tubing and the liquid of threeway annular space to be departed from needle tubing 8 and passes through screen cloth 7, in screen cloth
On 7 under the shear action of aperture, an air pocket is dispersed into many individual bubble diameter dbFor 50-900 μm of minute bubbles, shape is treated
Into after stable bubble stabilization, micro-amounts of liquids syringe pump 3 is reopened.There is expanding reach 12 to make at the described top of quartz ampoule 5
Bubble-break, so as to form stable more bubble bubble flows.The concentration of MB solution after finally sampling detection reaction.
Embodiment 1
Lived from methylene blue (MB) as reactant to investigate the photocatalysis of the small solution-air bubbling column reactor of photocatalysis
Property.Quartzy bore is 3mm, and length 100mm, the length of reflection shield is 150mm, and the internal diameter of T-shaped threeway is 2mm, needle tubing 8
Internal diameter is 0.13mm, and the aperture of screen cloth is 0.053mm.The small bubbling column reactor of photocatalysis in the process of running, the work(of xenon lamp
Rate is 200W, the initial concentration C of MB solution0For 20mgL-1, flow Q is 0.900mLmin-1, the flow V of airGFor
0.013rd, 0.225,0.450 and 0.675mLmin-1, corresponding superficial liquid velocity uLIt is 0.027,0.053,1.06 and respectively
1.59mm·s-1.The air pocket on the top of needle tubing 8 is rapid under the impetus of needle tubing and the liquid of threeway annular space to depart from needle tubing 8 simultaneously
Through screen cloth 7, on screen cloth 7 under the shear action of aperture, an air pocket is dispersed into many individual bubble diameter dbFor 50-
900 μm of minute bubbles, form stable bubble flow.
Comparative example 1：Not blowing air (VG=0mLmin-1), now reactant is only MB solution.
Comparative example 2：Blowing air (VG=0.675mLmin-1), but air pocket is dispersed into minute bubbles, shape by no screen cloth 7
Into be single air pocket bubble flow.
At different conditions, the small solution-air bubbling column reactor of photocatalysis be used for degrade MB solution when degradation rate such as Fig. 3
It is shown.Compared with the comparative example 1 of not blowing air, it is passed through the degradation rate after air and greatly improves.This aspect is due to Novel air
Air pocket is dispersed into hundreds of microns of minute bubbles by body distributor, and the flowing of liquid phase becomes bubble flow by laminar flow, avoids one
As slug flow in gas-liquid microreactor, the disturbance of bubble makes the mass tranfer coefficient of liquid phase improve an order of magnitude；On the other hand,
Being passed through for air increases the concentration of oxygen in liquid phase, and this also accelerates the speed of reaction.With being passed through air, but without screen cloth
Comparative example 2 is compared, although the total amount for the air being passed through is identical, its degradation rate also greatly improves.Pass through visualization method, system
Count the diameter of bubble and obtain the average diameter d of bubblebFor 432 μm, the 1/ of bubble diameter (1500 μm) about in comparative example 2
3, and based on the specific surface area of reactor volume by 48.8m2/m3169.5m is increased to2/m3, this is for promoting oxygen in gas phase
Mass transfer be very favorable.Therefore the reaction of resistance of gas mass transfer can be greatly improved using the gas distributor of the present invention.
The small solution-air bubbling column reactor of photocatalysis is compared with general microreactor, although the increase of characteristic size (bore) makes ratio
Surface area reduces, but still is approached with general microreactor, simultaneously as mass transfer rate significantly improves so that its average response
Speed is close with microreactor, but the increase of characteristic size, the treating capacity of reactor is improved an order of magnitude.With macroscopical gas-
Liquid bubbling column reactor is compared, and the average response speed of the small solution-air bubbling column reactor of photocatalysis improves two orders of magnitude, together
When, its reaction time is several minutes, far below a few hours of macroscopical solution-air bubbling column reactor.
Claims (2)
1. the small solution-air bubbling column reactor of photocatalysis, it is characterised in that：Including quartz ampoule and gas distributor, described
Immobilized on quartzy inside pipe wall to have catalyst film, described gas distributor includes T-shaped threeway, on the top of described T-shaped threeway
Portion exit is adhesively fixed with screen cloth, and needle tubing is vertically provided among pipe in the VERTICAL TUBE of described T-shaped threeway,
The top face screen cloth of described needle tubing sets and be 1-3mm, the bottom of described needle tubing and T-shaped threeway with the distance of screen cloth
Vertical bottom of the tube between be provided with sealing structure, used between the bottom of described quartz ampoule and the VERTICAL TUBE top of T-shaped threeway
Groove tube connects, and described groove tube includes the groove for being opened in groove tube internal upper part, is opened in the centre of the bottom wall of described groove
There is the interstitial hole of through-going recess, the bottom of described quartz ampoule is fixed in groove, and the VERTICAL TUBE top of described T-shaped threeway is inserted
In interstitial hole, set between the outer wall on the bottom for the quartz ampoule being connected with groove tube and the VERTICAL TUBE top of T-shaped threeway
There is fluid sealant to seal, gas micro-injection pump is connected by gas pipeline with the bottom inlet of the vertical pipeline section of T-shaped threeway
To convey gas, micro-amounts of liquids syringe pump is connected to convey liquid by fluid pipeline with the entrance of the horizontal pipeline section of T-shaped threeway
Body, expanding reach is provided with the top of described quartz ampoule, liquid outlet, described liquid are provided with described expanding reach
Outlet is connected with outlet line so that reacted liquid flows out, and light source is provided with front of described quartz ampoule, described
The rear of quartz ampoule be provided with Parabolic reflection shield, described Parabolic reflection shield can project light source flat
Row light is gathered in the focus of reflection shield, and the axis of described quartz ampoule overlaps with the focus of reflection shield, described reflection shield
Length is bigger than the length of quartz ampoule, and the internal diameter of described needle tubing is 0.06-0.34mm, and the aperture of described screen cloth is 0.031-
0.074mm, described quartzy bore are 1-10mm.
2. the small solution-air bubbling column reactor of photocatalysis according to claim 1, it is characterised in that：Described T-shaped threeway
Internal diameter be 1-5mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610813934.6A CN106237953B (en) | 2016-09-10 | 2016-09-10 | The small gas-liquid bubble column reactor of photocatalysis |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610813934.6A CN106237953B (en) | 2016-09-10 | 2016-09-10 | The small gas-liquid bubble column reactor of photocatalysis |
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| CN106237953A CN106237953A (en) | 2016-12-21 |
| CN106237953B true CN106237953B (en) | 2018-01-23 |
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| CN113477203A (en) * | 2021-07-12 | 2021-10-08 | 宁波高新区巴艺新材料科技有限公司 | Agitating unit is used in acrylic resin production |
| CN115406804B (en) * | 2022-09-13 | 2023-05-12 | 台州学院 | Method for measuring influence of jet bubble crying on turbulent flow of gas-liquid bubbling fluidized bed |
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| CN101670260A (en) * | 2009-10-20 | 2010-03-17 | 东华大学 | Microchannel type photocatalytic microreactor based on nanorod array and preparation method thereof |
| US7745366B2 (en) * | 2008-11-04 | 2010-06-29 | King Fahd University Of Petroleum And Minerals | Microwave spent catalyst decoking method |
| JP2015128742A (en) * | 2014-01-07 | 2015-07-16 | マイクロ波化学株式会社 | Chemical reaction device, and chemical reaction method |
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| CN1528513A (en) * | 2003-09-29 | 2004-09-15 | 华东理工大学 | Visible photoactivating photo catalyst and light-column type packed bed reaction unit |
| US7745366B2 (en) * | 2008-11-04 | 2010-06-29 | King Fahd University Of Petroleum And Minerals | Microwave spent catalyst decoking method |
| CN101670260A (en) * | 2009-10-20 | 2010-03-17 | 东华大学 | Microchannel type photocatalytic microreactor based on nanorod array and preparation method thereof |
| JP2015128742A (en) * | 2014-01-07 | 2015-07-16 | マイクロ波化学株式会社 | Chemical reaction device, and chemical reaction method |
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