CN103785374A - C (carbon) nano tube demercuration catalyst and preparation method thereof - Google Patents
C (carbon) nano tube demercuration catalyst and preparation method thereof Download PDFInfo
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- CN103785374A CN103785374A CN201410057491.3A CN201410057491A CN103785374A CN 103785374 A CN103785374 A CN 103785374A CN 201410057491 A CN201410057491 A CN 201410057491A CN 103785374 A CN103785374 A CN 103785374A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 50
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 16
- 239000002071 nanotube Substances 0.000 title claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title abstract description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 27
- 239000011651 chromium Substances 0.000 claims abstract description 27
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 26
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000001354 calcination Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 5
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 5
- 239000013543 active substance Substances 0.000 claims abstract description 4
- 238000007598 dipping method Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 17
- 229910001868 water Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 8
- OZECDDHOAMNMQI-UHFFFAOYSA-H cerium(3+);trisulfate Chemical compound [Ce+3].[Ce+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O OZECDDHOAMNMQI-UHFFFAOYSA-H 0.000 claims description 6
- 229910000333 cerium(III) sulfate Inorganic materials 0.000 claims description 6
- PHFQLYPOURZARY-UHFFFAOYSA-N chromium trinitrate Chemical compound [Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PHFQLYPOURZARY-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000011149 active material Substances 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- YMXKSNXSRYWSHS-UHFFFAOYSA-L S(=O)(=O)([O-])[O-].[Mn+2].[Cr+3] Chemical compound S(=O)(=O)([O-])[O-].[Mn+2].[Cr+3] YMXKSNXSRYWSHS-UHFFFAOYSA-L 0.000 claims description 4
- VGBWDOLBWVJTRZ-UHFFFAOYSA-K cerium(3+);triacetate Chemical compound [Ce+3].CC([O-])=O.CC([O-])=O.CC([O-])=O VGBWDOLBWVJTRZ-UHFFFAOYSA-K 0.000 claims description 4
- XHFVDZNDZCNTLT-UHFFFAOYSA-H chromium(3+);tricarbonate Chemical compound [Cr+3].[Cr+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O XHFVDZNDZCNTLT-UHFFFAOYSA-H 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 2
- 238000001802 infusion Methods 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 239000002109 single walled nanotube Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 150000003839 salts Chemical class 0.000 abstract 6
- 238000001035 drying Methods 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 8
- 229910052753 mercury Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical class OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 4
- 239000002956 ash Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000001473 noxious effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
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- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
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- 235000009566 rice Nutrition 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
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Abstract
The invention discloses a C (carbon) nano tube demercuration catalyst and a preparation method thereof. The catalyst comprises a carrier and an active substance attached to the inside of the carrier; the carrier is a carbon nano tube; the active substance consists of oxides of cerium and chromium; the oxide of the cerium is generated by calcining soluble salt of the cerium; the oxide of the chromium is generated by calcining soluble salt of the chromium. Based on that the carbon nano tube, the soluble salt of the cerium and the soluble salt of the chromium are taken as raw materials according to the mole ratio of the Ce element to the Cr element of (4-1):1, the preparation method for the C nano tube comprises the steps of immersing the carbon nano tube in concentrated nitric acid, adding the soluble salt of the cerium and the soluble salt of the chromium for dipping, and drying and calcining to obtain the medium-temperature demercuration catalyst. The catalyst is relatively high in activity and selectivity between 300 DEG C and 400 DEG C; and therefore, the catalyst is very suitable for a low-ash SCR (semiconductor control rectifier) denitration device. The raw materials of the catalyst are readily available, and the preparation method is simple; the catalyst is the medium-temperature demercuration catalyst with an extremely good effect.
Description
Technical field
The present invention relates to flue gas demercuration technical field, be specifically related to a kind of C nanotube demercuration Catalysts and its preparation method.
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Background technology
Mercury is the unique liquid metal element of nature, and fusing point only has-38.89 ℃.It as a kind of history of noxious material for a long time, belongs to the row of the trace element that toxicity is the strongest.Although mercury is slowly to the pollution of ecological environment, after entering atmosphere, water body and soil, can assemble in vivo, cause serious harm to human ecological environment.Environment Protect in China cloth promulgated by the ministries or commissions of the Central Government up-to-date " the long atmosphere pollutants emission standards of thermoelectricity (GB13223-2011) ", require from 2015, mercury in power plant soot fume and compound discharge capacity are controlled to 0.03mg/nm
3.
For the emission control of combustion product gases mercury, comparatively ripe demercuration method has SCR catalytic oxidation and the absorption method take active carbon as representative at present.Because active carbon adsorption exists low capacity, Combination poor, the feature of low thermodynamic stability, and also the utilization rate of active carbon is low, consumption greatly, is directly used activated adoption method high cost.SCR demercuration technology can be divided into the SCR of the SCR of high ash layout, low ash layout and the SCR that end is arranged according to position difference.But due to the restriction of demercuration temperature, most factory faces adopt high ash to arrange.In China, because the shortage that clean coal technology uses, after coal combustion, fly ash content is very high.Directly cause catalysis obstruction passivation serious, catalyst is shorter than abroad service life, and power plant's demercuration cost significantly increases.
Summary of the invention
The problems referred to above that exist for prior art, an object of the present invention is the deficiency that exists for present demercuration technical field, and a kind of high selectivity is provided, strong anti-Poisoning, and the demercuration catalyst that reactivity worth is good, is applicable to the demercuration of various stationary sources.
Another object is to provide a kind of method of preparing above-mentioned demercuration catalyst.
For achieving the above object, the present invention adopts following technical scheme: a kind of C nanotube demercuration catalyst, and comprise carrier and be attached to the active material in carrier, described carrier is CNT, described active material is the oxide of cerium and chromium; The oxide of described cerium is to generate after the soluble-salt roasting by cerium, and the oxide of chromium is to generate after the soluble-salt roasting by chromium.Carbon nanotube forms the carrier shell of catalyst, the active nano particle kernel of the oxide composition catalyst of cerium and chromium.
As optimization, the mol ratio of the soluble-salt of described CNT, water, cerium and the soluble-salt of chromium is: 1:10 ~ 1000: 0.0001 ~ 0.4:0.0001 ~ 0.1.Catalyst activity composition is configured in rational scope, reaches excellent demercuration effect, save catalysagen material simultaneously.
As optimization, CNT is single-walled nanotube or many walls nanotube, increases its surface area, improves its catalytic activity, and CNT diameter is between 8 ~ 10nm.
A method of preparing above-mentioned C nanotube demercuration catalyst, comprises the following steps:
1) take the soluble-salt of carbon nanotube, water, cerium and the soluble-salt of chromium as raw material, the red fuming nitric acid (RFNA) that is first 60%～90% with mass fraction carries out purification process to CNT, and in the water bath with thermostatic control of 70～90 ℃, stir 2～10 hours, then be 6 ~ 7 with deionized water rinsing to pH, finally oven dry at 60～150 ℃;
2) adopt infusion process carrying active substance on CNT, be specially: first the soluble-salt of the soluble-salt of cerium and chromium is configured to respectively to cerium solution and chromium solution, then CNT step 1) being obtained joins in the mixed solution of cerium solution and chromium solution and stirs dipping 2～20 hours, then at 60～150 ℃, dry, calcination 2～10 hours under last nitrogen protection, calcination temperature is 300～700 ℃, obtain catalyst sample, wherein, the mol ratio of Ce elements and chromium element is 4 ~ 1:1, the mol ratio of Ce elements and chromium element sum and carbon element is 0.01 ~ 0.5:1.
As optimization, in described step 1) the soluble-salt of cerium be in cerous nitrate, ammonium ceric nitrate, cerous sulfate, Cericammoniumsulfate and cerous acetate one or more; The soluble-salt of described chromium be in chromic nitrate, chromium carbonate, manganese sulfate chromium one or more.Catalyst activity composition wide material sources are easy to buy and preparation, if when the soluble-salt of the soluble-salt of cerium and chromium adopts multiple soluble-salt mixed preparing, in various soluble-salts, Ce and Cr mol ratio are calculated income value in the scope of above-mentioned requirements.
With respect to prior art, tool of the present invention has the following advantages:
1, the catalyst that demercuration catalyst provided by the invention is carbon based material cerium-carrying, chromium, this catalyst has higher activity and selectivity between 300～400 ℃, therefore be highly suitable for the SCR denitrification apparatus that low ash is arranged, these catalyst raw material wide material sources, preparation technology are simple, are a kind of well middle temperature catalysts.
2, demercuration catalyst provided by the invention is the breakthrough in demercuration technical field, proposes first take carbon based material as carrier loaded active material demercuration, and no longer place one's entire reliance upon traditional active carbon adsorption and titanium tungsten base SCR catalyst, have good application prospect.
3, due to special confinement effect and quantum effect, the growth of active nano particle suffers restraints, and its size decreases contributes to generate more Donna rice grain defect and oxygen room, and its catalytic activity strengthens, the selectively also effectively enhancing of reaction.Once the oxide of cerium and chromium enters confinement space in CNT, its catalytic activity and selectively all effectively strengthening.
4, excellent anti-poisoning capability.Compared with various traditional graininess demercuration catalyst, the tube wall of the demercuration catalyst of C nanotube provided by the invention completely cuts off solid-state noxious material outside tube wall, make it cannot contact the active nano particle that is positioned at pipe interior, avoided the toxic action of poisonous substance to active nano particle.
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The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
embodiment 1:
Catalyst raw material is CNT, water, cerous acetate, cerous nitrate and chromic nitrate.The advantages such as CNT makes with chemical vapour deposition technique, and it is controlled that this method has preparation condition, easy batch production, the diameter of CNT is between 8 ~ 10nm.First soaking CNT with 68% red fuming nitric acid (RFNA), and in the water bath with thermostatic control of 70 ℃, stir 2 hours, is then 6 with deionized water rinsing to pH, finally oven dry at 60 ℃.Get the CNT that 2 grams of red fuming nitric acid (RFNA)s were processed; toward wherein adding 0.2 gram of cerous acetate, 0.2g cerous nitrate (by appropriate water-soluble solution) and 0.2 gram of chromic nitrate (adding 5ml saturated oxalic acid solution to dissolve); stir and flood after 2 hours 80 ℃ of oven dry, then under nitrogen protection, 300 ℃ of calcinations obtain catalyst finished product for 3 hours.
The catalyst of preparation is put into fixed bed quartz tube reactor and carry out activity and selectivity test.Flue gas condition is reaction condition: total gas flow rate is 1L/min, and mercury concentration is 50ug/m
3, C
o2=4%, C
cO2=12%, C
hCl=5ppm, C
sO2=400ppm, C
nO=150ppm, NH
3/ NO=1:1, N
2as balanced gas, air speed is 60000h
-1.In 300～400 ℃, reaction temperature interval, demercuration rate is stabilized in more than 85%.
embodiment 2:
Catalyst raw material is CNT, water, cerous nitrate, cerous sulfate and chromium carbonate.CNT makes with chemical vapour deposition technique, and first soak CNT with 80% red fuming nitric acid (RFNA), and in the water bath with thermostatic control of 80 ℃, stir 4 hours, be then 6.5 with deionized water rinsing to pH, finally oven dry at 80 ℃.Get the CNT that 2 grams of red fuming nitric acid (RFNA)s were processed; toward wherein adding 1 gram of cerous nitrate, 0.5g cerous sulfate (by appropriate water-soluble solution) and 0.1 gram of chromium carbonate (adding 5ml saturated oxalic acid solution to dissolve); stir and flood 60 ℃ of oven dry after 5 hours, then under nitrogen protection, 400 ℃ of calcinations obtain catalyst finished product for 3 hours.
The catalyst of preparation is put into fixed bed quartz tube reactor and carry out activity and selectivity test.Flue gas condition is reaction condition: total gas flow rate is 1L/min, and mercury concentration is 50ug/m
3, C
o2=4%, C
cO2=12%, C
hCl=5ppm, C
sO2=400ppm, C
nO=150ppm, NH
3/ NO=1:1, N
2as balanced gas, air speed is 60000h
-1.In 300～400 ℃, reaction temperature interval, demercuration rate is stabilized in more than 85%.
embodiment 3:
Catalyst raw material is CNT, water, cerous nitrate and manganese sulfate chromium.CNT makes with chemical vapour deposition technique, and first soak CNT with 85% red fuming nitric acid (RFNA), and in the water bath with thermostatic control of 80 ℃, stir 8 hours, be then 7 with deionized water rinsing to pH, finally oven dry at 100 ℃.Get the CNT that 2 grams of red fuming nitric acid (RFNA)s were processed; toward wherein adding 0.2 gram of cerous nitrate (by appropriate water-soluble solution) and 0.1 gram of manganese sulfate chromium (adding 5ml saturated oxalic acid solution to dissolve); stir and flood 100 ℃ of oven dry after 10 hours, then under nitrogen protection, 550 ℃ of calcinations obtain catalyst finished product for 3 hours.
The catalyst of preparation is put into fixed bed quartz tube reactor and carry out activity and selectivity test.Flue gas condition is reaction condition: total gas flow rate is 1L/min, and mercury concentration is 50ug/m
3, C
o2=4%, C
cO2=12%, C
hCl=5ppm, C
sO2=400ppm, C
nO=150ppm, NH
3/ NO=1:1, N2 is as balanced gas, and air speed is 60000h
-1.In 300～400 ℃, reaction temperature interval, demercuration rate is stabilized in more than 80%.
embodiment 4:
Catalyst raw material is CNT, water, cerous sulfate, ammonium ceric nitrate and chromic nitrate.CNT makes with chemical vapour deposition technique, and first soak CNT with 90% red fuming nitric acid (RFNA), and in the water bath with thermostatic control of 90 ℃, stir 10 hours, be then 7 with deionized water rinsing to pH, finally oven dry at 150 ℃.Get the CNT that 2 grams of red fuming nitric acid (RFNA)s were processed; toward wherein adding 2 grams of ammonium ceric nitrates, 1 gram of cerous sulfate (by appropriate water-soluble solution) and 0.2 gram of chromic nitrate (adding 5ml saturated oxalic acid solution to dissolve); stir and flood 120 ℃ of oven dry after 20 hours, then under nitrogen protection, 700 ℃ of calcinations obtain catalyst finished product for 3 hours.
The catalyst of preparation is put into fixed bed quartz tube reactor and carry out activity and selectivity test.Flue gas condition is reaction condition: total gas flow rate is 1L/min, and mercury concentration is 50ug/m
3, C
o2=4%, C
cO2=12%, C
hCl=5ppm, C
sO2=400ppm, C
nO=150ppm, NH
3/ NO=1:1, N
2as balanced gas, air speed is 60000h
-1.In 300～400 ℃, reaction temperature interval, demercuration rate is stabilized in more than 85%.
Can be found out by above-described embodiment and activity and selectivity test, CNT demercuration is feasible.Its demercuration rate can reach 80% left and right.Meanwhile, these catalyst raw material wide material sources, preparation technology are simple, are a kind of well middle temperature catalysts.There is potential commercial researching value and Practical significance.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (5)
1. a C nanotube demercuration catalyst, is characterized in that: comprise carrier and be attached to the active material in carrier, described carrier is CNT, and described active material is the oxide of cerium and chromium; The oxide of described cerium is to generate after the soluble-salt roasting by cerium, and the oxide of chromium is to generate after the soluble-salt roasting by chromium.
2. C nanotube demercuration catalyst as claimed in claim 1, is characterized in that: the mol ratio of the soluble-salt of described CNT, water, cerium and the soluble-salt of chromium is: 1:10 ~ 1000: 0.0001 ~ 0.4:0.0001 ~ 0.1.
3. C nanotube demercuration catalyst as claimed in claim 1, is characterized in that: described CNT is single-walled nanotube or many walls nanotube.
4. a method of preparing C nanotube demercuration catalyst claimed in claim 1, is characterized in that, comprises the following steps:
1) take the soluble-salt of carbon nanotube, water, cerium and the soluble-salt of chromium as raw material, the red fuming nitric acid (RFNA) that is first 60%～90% with mass fraction carries out purification process to CNT, and in the water bath with thermostatic control of 70～90 ℃, stir 2～10 hours, then be 6 ~ 7 with deionized water rinsing to pH, finally oven dry at 60～150 ℃;
2) adopt infusion process carrying active substance on CNT, be specially: first the soluble-salt of the soluble-salt of cerium and chromium is configured to respectively to cerium solution and chromium solution, then CNT step 1) being obtained joins in the mixed solution of cerium solution and chromium solution and stirs dipping 2～20 hours, then at 60～150 ℃, dry, finally calcination 2～10 hours under nitrogen protection, calcination temperature is 300～700 ℃, obtain catalyst sample, wherein, the mol ratio of Ce elements and chromium element is 4 ~ 1:1, the mol ratio of Ce elements and chromium element sum and carbon element is 0.01 ~ 0.5:1.
5. the method for preparing C nanotube demercuration catalyst as claimed in claim 4, is characterized in that: in described step 1) the soluble-salt of cerium be in cerous nitrate, ammonium ceric nitrate, cerous sulfate, Cericammoniumsulfate and cerous acetate one or more; The soluble-salt of described chromium be in chromic nitrate, chromium carbonate, manganese sulfate chromium one or more.
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| CN102151575A (en) * | 2011-01-29 | 2011-08-17 | 浙江师范大学 | Method for preparing carbon nanometer tube loaded type catalyst |
| CN102335603A (en) * | 2011-07-20 | 2012-02-01 | 中电投远达环保工程有限公司 | Denitrification catalyst capable of oxidizing simple substance mercury |
| CN102513095A (en) * | 2011-11-23 | 2012-06-27 | 浙江大学 | Medium temperature denitration catalyst with carbon-based material loaded with cerium tungsten and preparation method of medium temperature denitration catalyst |
| CN103159169A (en) * | 2011-12-12 | 2013-06-19 | 中国科学院大连化学物理研究所 | Effective method for filling metal or metallic oxide nano particles in carbon nano tube by using hydrophilization treatment |
| CN102909024A (en) * | 2012-10-09 | 2013-02-06 | 济南迪诺环保科技有限公司 | Two-step three-effect non-noble metal catalyst for purification of automobile exhaust |
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