CN102614866B - Honeycomb SCR smoke denitration catalyst embryoid body and preparation method thereof - Google Patents
Honeycomb SCR smoke denitration catalyst embryoid body and preparation method thereof Download PDFInfo
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- CN102614866B CN102614866B CN 201210051993 CN201210051993A CN102614866B CN 102614866 B CN102614866 B CN 102614866B CN 201210051993 CN201210051993 CN 201210051993 CN 201210051993 A CN201210051993 A CN 201210051993A CN 102614866 B CN102614866 B CN 102614866B
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- 239000003054 catalyst Substances 0.000 title claims abstract description 96
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000000779 smoke Substances 0.000 title abstract description 6
- 210000002242 embryoid body Anatomy 0.000 title abstract 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000007864 aqueous solution Substances 0.000 claims abstract description 20
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000919 ceramic Substances 0.000 claims abstract description 19
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001125 extrusion Methods 0.000 claims abstract description 15
- 239000008367 deionised water Substances 0.000 claims abstract description 13
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 235000014655 lactic acid Nutrition 0.000 claims abstract description 10
- 239000004310 lactic acid Substances 0.000 claims abstract description 10
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims abstract description 7
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 7
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims abstract description 7
- 239000004927 clay Substances 0.000 claims abstract description 7
- 235000011187 glycerol Nutrition 0.000 claims abstract description 7
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 7
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 7
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 7
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 7
- XNHGKSMNCCTMFO-UHFFFAOYSA-D niobium(5+);oxalate Chemical compound [Nb+5].[Nb+5].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O XNHGKSMNCCTMFO-UHFFFAOYSA-D 0.000 claims abstract description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 7
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000008117 stearic acid Substances 0.000 claims abstract description 7
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 62
- 239000003546 flue gas Substances 0.000 claims description 62
- 238000002156 mixing Methods 0.000 claims description 31
- 210000001161 mammalian embryo Anatomy 0.000 claims description 13
- 239000011259 mixed solution Substances 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 18
- 241000264877 Hippospongia communis Species 0.000 description 12
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 238000001035 drying Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 206010013786 Dry skin Diseases 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The invention discloses a honeycomb SCR (Selective Catalytive Redution) smoke denitration catalyst embryoid body and a preparation method thereof. The honeycomb SCR smoke denitration catalyst body consists of the following raw materials as per percentage by weight: 40 to 60 percent of titanium dioxide, 1 to 10 percent of white clay, 0.1 to 1 percent of ammonium metavanadate, 1 to 8 percent of ammonium meta-tungstate, 0.1 to 3 percent of niobium oxalate, 0.5 to 3 percent of lactic acid aqueous solution, 1 to 5 percent of oxalic acid aqueous solution, 25 to 35 percent of deionized water, 1 to 10 percent of ceramic fiber, 0.1 to 3 percent of fluff pulp, 0.1 to 1 percent of stearic acid, 0.1 to 1 percent of hydroxypropyl methyl cellulose and 1 to 5 percent of glycerol. The honeycomb SCR smoke denitration catalyst embryoid body has high plasticity, caking property and mechanical strength. The method is simple and convenient in operation and low in cost. Each component of the prepared catalyst body is dispersed uniformly; the catalyst body is easy in forming and demolding in the extrusion process and has high finished product rate; and the catalyst prepared by the embryoid body has high denitration efficiency.
Description
Technical field
The present invention relates to technical field of waste gas treatment, be specifically related to a kind of honeycomb-shaped SCR catalyst for denitrating flue gas idiosome and preparation method thereof.
Background technology
Along with " thermal power plant's atmosphere pollutants emission standards " promulgation (GB13223-2011), it is strict that the discharge standard of nitrogen oxide more becomes.SCR (SCR) has denitration efficiency efficiently, and the discharging of energy better controlled thermal power plant nitrogen oxide is the method for controlling nitrogen oxide at present the most efficiently, also will become the mainstream technology of denitrating flue gas gradually.Catalyst is the core of SCR technology, because SCR technology is arranged in the high ash section between economizer and the air preheater mostly, catalyst is in the flue gas of high dust, if adopt granular catalyst can cause the obstruction of bed, resistance increases, make pressure drop increase, reaction continous-stable operation for a long time, therefore commercial catalysts adopts integral catalyzer usually, and as honeycombed catalyst, its ceramic honey comb percent opening is big, surface area is big, catalyst volume is little, helps passing through smoothly of dust, has advantage such as be difficult for to stop up, wear-resistant, easy to loading and unloading.
The ceramic honeycomb catalyst idiosome has decisive action to the activity of ceramic honeycomb catalyst, thereby ceramic honeycomb catalyst idiosome and preparation thereof are one of keys of ceramic honeycomb catalyst.But shortcomings such as it is inhomogeneous that the ceramic honeycomb catalyst idiosome that existing denitrating flue gas is used exists component to mix, and intensity is low, it is not high to be difficult for the demoulding, yield rate during extrusion molding in its preparation process.Therefore, develop a kind of low cost, high performance ceramic honeycomb catalyst idiosome has a good application prospect.
Granted publication number discloses a kind of aluminium titanates-mullite ceramic honey comb and preparation method thereof for the Chinese patent of CN101074161B, earlier aluminium titanates and mullite are compounded to form composite diphase material according to performance requirement, add the compound plasticized modifier that disposes and the mould that designs voluntarily again, obtain idiosome through mixing, pugging, after extruding, carry out again obtaining cellular structure after drying, the roasting, this preparation method's operation is complicated, narrow application range, the honeycomb molded body that obtains can't satisfy the performance requirement of the required catalyst in present denitrating flue gas field.
Granted publication number discloses integral honeycomb selective catalytic reduction catalyst for flue gas denitration and preparation method for the Chinese patent of CN101502796B, catalyst is carrier and skeleton with the nano titanium oxide, the denitration activity component is evenly distributed in the skeleton, and the bond of adding proper proportion, its percentage by weight is: nano titanium oxide 60~85%, and active component 4~25%, bond is 5~20%, this catalyst is applicable to the improvement of large-sized station boiler tail gas, but denitration efficiency is lower.
Summary of the invention
The invention provides a kind of honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, plasticity is excellent, and caking property is strong, the mechanical strength height.
A kind of honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, the mass percent of its raw material consists of:
The mass percent concentration of described oxalic acid aqueous solution is 40~60%; The mass percent concentration of described lactic acid aqueous solution is 50~60%.
Described ceramic fibre, Time of Fluff Slurry are commercially available finished product, and ceramic fibre is a kind of fibrous light refractory material, the F-1260 type ceramic fibre that can select for use Deqing, the Zhejiang refined crystal fibre of indigo plant Co., Ltd to produce; Described Time of Fluff Slurry is through bleaching, extracts wood pulp, straw pulp after the operation such as organic solvent out, the optional Time of Fluff Slurry of using from the prosperous civilian fibrous material in Daye City, Hubei processing factory, and its width is 20~25 μ m, length is 0.5~1mm.
The present invention also provides a kind of preparation method of honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, may further comprise the steps:
(1) get the raw materials ready by following mass percent:
The mass percent concentration of described oxalic acid aqueous solution is 40~60%; The mass percent concentration of described lactic acid aqueous solution is 50~60%.
(2) ammonium metavanadate, ammonium metatungstate, niobium oxalate are mixed with oxalic acid aqueous solution, obtain mixed solution;
(3) mixed solution that obtains in titanium dioxide, white clay, lactic acid aqueous solution, stearic acid, deionized water, the step (2) is carried out once mixing, once mixing end adds ceramic fibre, Time of Fluff Slurry, hydroxypropyl methylcellulose, glycerine, deionized water again and carries out the mixing mud embryo that obtains of secondary;
(3) successively the mud embryo is carried out old processing, filtering and impurity removing, extrusion molding and obtain honeycomb-shaped SCR catalyst for denitrating flue gas idiosome.
The mixing temperature of described once mixing, secondary is 75 ℃~85 ℃, and the once mixing time is 30~60min, and the mixing time of secondary is 10~20min, and each component is uniformly dispersed, and is conducive to the extrusion molding of postorder.
Described old temperature is 15 ℃~25 ℃, and the old time is 6~12h, and each component is uniformly dispersed, and to improve the plasticity of idiosome, is conducive to the extrusion molding of postorder.
The filter screen order number that adopts in the described filtering and impurity removing is 14~20 orders.
What described extrusion molding was adopted is vacuum-extruder, the negative pressure of described vacuum-extruder is-and 0.085MPa~-0.095MPa.
In the preparation process of honeycomb-shaped SCR catalyst for denitrating flue gas idiosome of the present invention, for obtaining good extrusion molding effect, be beneficial to the shaping and demoulding of catalyst idiosome, can before carrying out extrusion molding, extrude processing in advance to the mud embryo as required.
The present invention compared with prior art has following advantage:
Catalyst idiosome of the present invention has good plasticity, strong cohesive property, high mechanical properties; Catalyst idiosome preparation method of the present invention is easy and simple to handle, cost is low, and each component is uniformly dispersed in the catalyst idiosome for preparing, the easy shaping and demoulding of extrusion, yield rate height; The catalyst denitration efficiency height that is made by catalyst idiosome of the present invention.
Description of drawings
Fig. 1 is the process flow diagram of honeycomb-shaped SCR catalyst for denitrating flue gas idiosome preparation of the present invention.
The specific embodiment
The preparation of embodiment 1 honeycomb-shaped SCR catalyst for denitrating flue gas idiosome
Be that 60% oxalic acid aqueous solution stirs under 50 ℃ of temperature, mixes with ammonium metavanadate 10g, ammonium metatungstate 20g, niobium oxalate 25g and 20ml mass percent concentration, obtain mixed solution;
Be that 50% lactic acid aqueous solution 10ml, stearic acid 3g, deionized water 275ml, above-mentioned mixed solution are put into mixer and carried out once mixing under 80 ℃ with titanium dioxide 412g, white clay 80g, mass percent concentration, add ceramic fibre 80g (F-1260 type ceramic fibre behind the mixing 42min again, Deqing, Zhejiang blue refined crystal fibre Co., Ltd), Time of Fluff Slurry 3g (Daye City, Hubei prosperous civilian fibrous material processing factory), hydroxypropyl methylcellulose 2g, glycerine 20ml, that deionized water 40ml carries out secondary is mixing, obtains the mud embryo behind the mixing 15min;
The mud embryo is encased with plastic foil, be placed on shady and cool moist place (temperature is about 23 ℃) and carry out old processing, old time 12h;
It is that 16 purpose filters filter removal impurity that idiosome after old is put into filter screen order number, puts into pre-extruder again and is extruded into block idiosome;
Block idiosome is put into vacuum-extruder, and extrusion molding obtains honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, wherein the vacuum chamber negative pressure remain-0.085MPa~-0.095MPa.
The preparation of embodiment 2 honeycomb-shaped SCR catalyst for denitrating flue gas idiosomes
Be that 60% oxalic acid aqueous solution stirs under 50 ℃ of temperature, mixes with ammonium metavanadate 2g, ammonium metatungstate 40g, niobium oxalate 5g and 35ml mass percent concentration, obtain mixed solution;
Be that 50% lactic acid aqueous solution 15ml, stearic acid 8g, deionized water 210ml, mixed solution are put into mixer and carried out once mixing under 80 ℃ with titanium dioxide 590g, white clay 11g, mass percent concentration, add ceramic fibre 30g, Time of Fluff Slurry 20g, hydroxypropyl methylcellulose 10g, glycerine 25ml behind the mixing 60min again, that deionized water 50ml carries out secondary is mixing, obtains the mud embryo behind the mixing 10min;
The mud embryo is encased with plastic foil, be placed on shady and cool moist place (temperature is about 15 ℃) and carry out old processing, old time 6h;
It is that 20 purpose filters filter removal impurity that idiosome after old is put into filter screen order number, puts into pre-extruder again and is extruded into block idiosome;
Block idiosome is put into vacuum-extruder, and extrusion molding obtains honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, wherein the vacuum chamber negative pressure remain-0.085MPa~-0.095MPa.
The preparation of embodiment 3 honeycomb-shaped SCR catalyst for denitrating flue gas idiosomes
Be that 60% oxalic acid aqueous solution stirs under 50 ℃ of temperature, mixes with ammonium metavanadate 5g, ammonium metatungstate 20g, niobium oxalate 3g and 30ml mass percent concentration, obtain mixed solution;
Be that 50% lactic acid aqueous solution 12ml, stearic acid 10g, deionized water 230ml, mixed solution are put into mixer and carried out once mixing under 80 ℃ with titanium dioxide 525g, white clay 30g, mass percent concentration, add ceramic fibre 50g, Time of Fluff Slurry 10g, hydroxypropyl methylcellulose 5g, glycerine 20ml behind the mixing 55min again, that deionized water 50ml carries out secondary is mixing, obtains the mud embryo behind the mixing 15min;
The mud embryo is encased with plastic foil, be placed on shady and cool moist place (temperature is about 20 ℃) and carry out old processing, the old time is 8h;
It is that 18 purpose filters filter removal impurity that idiosome after old is put into filter screen order number, puts into pre-extruder again and is extruded into block idiosome;
Block idiosome is put into vacuum-extruder, and extrusion molding obtains honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, wherein the vacuum chamber negative pressure remain-0.085MPa~-0.095MPa.
The preparation of embodiment 4 honeycomb-shaped SCR catalyst for denitrating flue gas idiosomes
Be that 60% oxalic acid aqueous solution stirs under 50 ℃ of temperature, mixes with ammonium metavanadate 8g, ammonium metatungstate 15g, niobium oxalate 15g and 50ml mass percent concentration, obtain mixed solution;
Be that 50% lactic acid aqueous solution 12ml, stearic acid 5g, deionized water 230ml, above-mentioned mixed solution are put into mixer and carried out once mixing under 80 ℃ with titanium dioxide 455g, white clay 60g, mass percentage concentration, add ceramic fibre 60g, Time of Fluff Slurry 15g, hydroxypropyl methylcellulose 5g, glycerine 20ml behind the mixing 30min again, that deionized water 50ml carries out secondary is mixing, obtains the mud embryo behind the mixing 20min;
The mud embryo is encased with plastic foil, be placed on shady and cool moist place (temperature is about 23 ℃) and carry out old processing, old time 6h;
It is that 20 purpose filters filter removal impurity that idiosome after old is put into filter screen order number, puts into pre-extruder again and is extruded into block idiosome;
Block idiosome is put into vacuum-extruder, and extrusion molding obtains honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, wherein the vacuum chamber negative pressure remain-0.085MPa~-0.095MPa.
Embodiment 5 honeycomb-shaped SCR catalyst for denitrating flue gas mechanical strengths and specific area test
The honeycomb-shaped SCR catalyst for denitrating flue gas idiosome that obtains in the embodiment of the invention 1 in 20~50 ℃ of dryings 7 days, behind 600 ℃ of roasting 5h, is obtained honeycomb-shaped SCR catalyst for denitrating flue gas coupon.Coupon is cut into the square coupon, put into universal testing machine and test, obtaining the vertical compression strength of honeycomb-shaped SCR catalyst for denitrating flue gas is 360N/cm
2, under the equal conditions, the vertical compression strength that records existing certain commercially available honeycomb denitrating catalyst is 310N/cm
2With square coupon crushing screening, obtain particle diameter and be the catalyst granules between 40 order to 60 orders, get the part particle and put into the Autosorb-1-c instrument that U.S. Kang Ta company produces and carry out the specific area test, recording honeycomb-shaped SCR catalyst for denitrating flue gas specific area is 71.6m
2/ g, under the equal conditions, the specific area that records existing certain commercially available honeycomb denitrating catalyst is 62m
2/ g.
Embodiment 6 honeycomb-shaped SCR catalyst for denitrating flue gas mechanical strengths and specific area test
The honeycomb-shaped SCR catalyst for denitrating flue gas idiosome for preparing in the embodiment of the invention 2 in 20~50 ℃ of dryings 7 days, behind 600 ℃ of roasting 5h, is obtained honeycomb-shaped SCR catalyst for denitrating flue gas coupon.Coupon is cut into the square coupon, put into universal testing machine and test, obtaining the vertical compression strength of honeycomb-shaped SCR catalyst for denitrating flue gas is 325N/cm
2With square coupon crushing screening, obtain particle diameter and be the catalyst granules between 40 order to 60 orders, get the part particle and put into the Autosorb-1-c instrument that U.S. Kang Ta company produces and carry out the specific area test, recording honeycomb-shaped SCR catalyst for denitrating flue gas specific area is 65.6m
2/ g.
Embodiment 7 honeycomb-shaped SCR catalyst for denitrating flue gas mechanical strengths and specific area test
The honeycomb-shaped SCR catalyst for denitrating flue gas idiosome for preparing in the embodiment of the invention 3 in 20~50 ℃ of dryings 7 days, behind 600 ℃ of roasting 5h, is obtained honeycomb-shaped SCR catalyst for denitrating flue gas coupon.Coupon is cut into the square coupon, put into universal testing machine and test, obtaining the vertical compression strength of honeycomb-shaped SCR catalyst for denitrating flue gas is 335N/cm
2With square coupon crushing screening, obtain particle diameter and be the catalyst granules between 40 order to 60 orders, get the part particle and put into the Autosorb-1-c instrument that U.S. Kang Ta company produces and carry out the specific area test, recording honeycomb-shaped SCR catalyst for denitrating flue gas specific area is 67.6m
2/ g.
Embodiment 8 honeycomb-shaped SCR catalyst for denitrating flue gas mechanical strengths and specific area test
The honeycomb-shaped SCR catalyst for denitrating flue gas idiosome for preparing in the embodiment of the invention 4 in 20~50 ℃ of dryings 7 days, behind 600 ℃ of roasting 5h, is obtained honeycomb-shaped SCR catalyst for denitrating flue gas coupon.Coupon is cut into the square coupon, put into universal testing machine and test, obtaining the vertical compression strength of honeycomb-shaped SCR catalyst for denitrating flue gas is 340N/cm
2With square coupon crushing screening, obtain particle diameter and be the catalyst granules between 40 order to 60 orders, get the part particle and put into the Autosorb-1-c instrument that U.S. Kang Ta company produces and carry out the specific area test, recording honeycomb-shaped SCR catalyst for denitrating flue gas specific area is 69.1m
2/ g.
Embodiment 9 honeycomb-shaped SCR catalyst for denitrating flue gas activity ratings
The honeycomb-shaped SCR catalyst for denitrating flue gas idiosome for preparing in the embodiment of the invention 1 in 20~50 ℃ of dryings 7 days, behind 600 ℃ of roasting 5h, is obtained honeycomb-shaped SCR catalyst for denitrating flue gas coupon.Honeycomb-shaped SCR catalyst for denitrating flue gas coupon is cut into 50mm * 50mm * 300mm coupon, this coupon is put into homemade catalyst activity evaluating apparatus carry out active testing, smoke components is 300ppm NO, 300ppm NH
3, 500ppm SO
2, 10vol%H
2O, 5vol%O
2, all the other are N
2Area speed is 20m/h, and reaction temperature is 360 ℃, and recording the catalyst denitration efficiency after stablizing is 97.2%.
Embodiment 10 honeycomb-shaped SCR catalyst for denitrating flue gas activity ratings
The honeycomb-shaped SCR catalyst for denitrating flue gas idiosome for preparing in the embodiment of the invention 4 in 20~50 ℃ of dryings 7 days, behind 600 ℃ of roasting 5h, is obtained honeycomb-shaped SCR catalyst for denitrating flue gas coupon.Honeycomb-shaped SCR catalyst for denitrating flue gas coupon is cut into 50mm * 50mm * 300mm coupon, this coupon is put into homemade catalyst activity evaluating apparatus carry out active testing, smoke components is 300ppm NO, 300ppm NH
3, 500ppm SO
2, 10vol%H
2O, 5vol%O
2, all the other are N
2Area speed is 20m/h, and reaction temperature is 320 ℃, and recording the catalyst denitration efficiency after stablizing is 92.9%.
Claims (7)
1. honeycomb-shaped SCR catalyst for denitrating flue gas idiosome is characterized in that the mass percent of its raw material consists of:
The preparation method of described honeycomb-shaped SCR catalyst for denitrating flue gas idiosome may further comprise the steps:
(1) gets the raw materials ready by above mass percent;
(2) ammonium metavanadate, ammonium metatungstate, niobium oxalate are mixed with oxalic acid aqueous solution, obtain mixed solution;
(3) mixed solution that obtains in titanium dioxide, white clay, lactic acid aqueous solution, stearic acid, deionized water and the step (2) is carried out once mixing, add ceramic fibre, Time of Fluff Slurry, hydroxypropyl methylcellulose, glycerine, deionized water after the mixing end again and carry out the mixing mud embryo that obtains of secondary;
(4) successively the mud embryo is carried out old processing, filtering and impurity removing, extrusion modling and obtain honeycomb-shaped SCR catalyst for denitrating flue gas idiosome.
2. honeycomb-shaped SCR catalyst for denitrating flue gas idiosome as claimed in claim 1 is characterized in that, the mass percent concentration of described oxalic acid aqueous solution is 40~60%.
3. honeycomb-shaped SCR catalyst for denitrating flue gas idiosome as claimed in claim 1 is characterized in that, the mass percent concentration of described lactic acid aqueous solution is 50~60%.
4. honeycomb-shaped SCR catalyst for denitrating flue gas idiosome as claimed in claim 1, it is characterized in that, among the preparation method of described honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, the mixing temperature of described once mixing, secondary is 75 ℃~85 ℃, the once mixing time is 30~60min, and the mixing time of secondary is 10~20min.
5. honeycomb-shaped SCR catalyst for denitrating flue gas idiosome as claimed in claim 1 is characterized in that, among the preparation method of described honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, described old temperature is 15 ℃~25 ℃, and the old time is 6~12h.
6. honeycomb-shaped SCR catalyst for denitrating flue gas idiosome as claimed in claim 1 is characterized in that, among the preparation method of described honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, the filter screen order number that adopts in the described filtering and impurity removing is 14~20 orders.
7. honeycomb-shaped SCR catalyst for denitrating flue gas idiosome as claimed in claim 1, it is characterized in that, among the preparation method of described honeycomb-shaped SCR catalyst for denitrating flue gas idiosome, what described extrusion molding was adopted is vacuum-extruder, the negative pressure of described vacuum-extruder is-and 0.085MPa~-0.095MPa.
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CN 201210051993 CN102614866B (en) | 2012-03-01 | 2012-03-01 | Honeycomb SCR smoke denitration catalyst embryoid body and preparation method thereof |
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Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201210051993 CN102614866B (en) | 2012-03-01 | 2012-03-01 | Honeycomb SCR smoke denitration catalyst embryoid body and preparation method thereof |
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CN102614866A CN102614866A (en) | 2012-08-01 |
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CN103623806B (en) * | 2013-09-24 | 2015-05-20 | 无锡华光新动力环保科技股份有限公司 | SCR (Selective Catalytic Reduction) honeycombed denitration catalyst production technology |
CN103586016B (en) * | 2013-11-14 | 2016-02-10 | 索平 | Honeycomb fashion denitrifying catalyst with selective catalytic reduction and preparation method thereof |
CN103878032A (en) * | 2014-03-25 | 2014-06-25 | 浙江海亮环境材料有限公司 | SCR denitration catalyst with clay |
CN104307508A (en) * | 2014-10-17 | 2015-01-28 | 辽宁科隆精细化工股份有限公司 | Preparation method of SCR denitration catalyst capable of being rapidly dried |
CN105148904A (en) * | 2015-08-28 | 2015-12-16 | 武汉京运通环保工程有限公司 | Flue gas denitration catalyst applied at a low temperature and preparation method thereof |
CN105964239B (en) * | 2016-05-23 | 2018-09-11 | 石河子大学 | The preparation method of spherical denitrating catalyst |
CN107321176A (en) * | 2017-06-27 | 2017-11-07 | 中国第汽车股份有限公司 | A kind of preparation method of the compound monoblock type SCR catalytic reactors of inorganic oxide |
CN113509924B (en) * | 2021-05-22 | 2022-05-03 | 山东博霖环保科技发展有限公司 | Denitration catalyst and production process thereof |
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