CN101357322A - Preparation method of transition metal compound loaded vermiculite absorbent - Google Patents
Preparation method of transition metal compound loaded vermiculite absorbent Download PDFInfo
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- CN101357322A CN101357322A CNA2008100589294A CN200810058929A CN101357322A CN 101357322 A CN101357322 A CN 101357322A CN A2008100589294 A CNA2008100589294 A CN A2008100589294A CN 200810058929 A CN200810058929 A CN 200810058929A CN 101357322 A CN101357322 A CN 101357322A
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- vermiculite
- metal compound
- mercury
- transition metal
- adsorbent
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- 229910052902 vermiculite Inorganic materials 0.000 title claims abstract description 45
- 239000010455 vermiculite Substances 0.000 title claims abstract description 45
- 235000019354 vermiculite Nutrition 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 150000003623 transition metal compounds Chemical class 0.000 title claims abstract description 9
- 239000002250 absorbent Substances 0.000 title claims description 12
- 230000002745 absorbent Effects 0.000 title claims description 12
- 239000003463 adsorbent Substances 0.000 claims abstract description 26
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 22
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 8
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 238000005188 flotation Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims description 4
- 150000002736 metal compounds Chemical class 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000012286 potassium permanganate Substances 0.000 claims description 3
- 238000006424 Flood reaction Methods 0.000 claims description 2
- 238000010790 dilution Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims description 2
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 claims description 2
- 239000011817 metal compound particle Substances 0.000 claims description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 53
- 229910052753 mercury Inorganic materials 0.000 abstract description 47
- 238000001179 sorption measurement Methods 0.000 abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 11
- 239000003546 flue gas Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 9
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 239000002689 soil Substances 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 12
- 239000003245 coal Substances 0.000 description 9
- 239000011575 calcium Substances 0.000 description 5
- 239000003610 charcoal Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000006317 isomerization reaction Methods 0.000 description 2
- 239000002075 main ingredient Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 238000005899 aromatization reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007323 disproportionation reaction Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- BKBMACKZOSMMGT-UHFFFAOYSA-N methanol;toluene Chemical compound OC.CC1=CC=CC=C1 BKBMACKZOSMMGT-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Abstract
The invention relates to a preparation method of a vermiculite adsorbent loaded on a transition metal compound. The method comprises the following steps: original vermiculite soil, the transition metal compound and hydrochloric acid or nitric acid are evenly mixed in proportion, then dipped, and dried to obtain the adsorbent which is applicable to the adsorption and purification of trace gaseous elemental mercury in coal-fired flue gas or other industrial tail gases. The demercuration efficiency of the adsorbent can reach 180-250ug/g, which is 35-60 times the efficiency of active carbon under the same conditions, so that by taking the vermiculite as the adsorbent of coal-fired flue gas mercury, remarkable technical effect is obtained, and the adsorbent has better applicability compared with the active carbon.
Description
One, technical field
The present invention relates to a kind of gaseous elemental mercury removing pollutant treatment technology.
Two, background technology
Mercury is trace element in coal, but the environmental pollution that it may cause but is the problem of people's special concern.The nearest data analysis of U.S. environmental protection general administration and the United Nations shows, the annual discharging naturally in the whole world and anthropogenic discharge's mercury approximately are 4400-7500t, wherein U.S. anthropogenic discharge mercury accounts for 3% (132-225t/yr) of the total mercury emissions in the whole world greatly, wherein the discharging of coal-burning power plant's mercury accounts for 1% of the total mercury emissions in the whole world, promptly accounts for 33% (44-75t/yr) of the artificial mercury emissions of the U.S..The mercury that discharges from coal-burning boiler has three kinds of forms: simple substance mercury (Hg
0), the mercury (Hg of oxidation state
+And Hg
2+) and the mercury of particulate form.Because mercuric compound has very high water-soluble, particle mercury can be caught by deduster, so the mercury of these two kinds of forms is removed than being easier to relatively, and simple substance mercury is owing to pass through the atmosphere transportation of long distance easily in atmosphere, and form global mercury pollution, its mean residence time in atmosphere reaches half a year to two year, is one of form the most rambunctious.Therefore, to being controlled to of simple substance mercury pollution the emphasis and the difficult point of current research.On March 15th, 2005, Environmental Protection Agency has announced " atmosphere cleaning mercury bill ", purpose is exactly the emission problem of long-term control coal-burning power plant mercury, target is controlled within 38 tons to mercury emission in 2010 exactly, be controlled within 15 tons to mercury emission in 2018, discharge capacity than 1999 nearly reduces 70%.
China's coal is as primary energy, and its mode of utilizing mainly is burning in China, and annual 84% of the coal of producing of China is directly used in burning.For a long time, the ratio of coal in China's energy consumption structure is very high always.According to prediction, by 2015, coal also will account for 62.6%, even to the year two thousand fifty, coal still accounts for more than 50%.So not only present, and in a quite long period, China will be difficult to change based on the energy consumption structure of coal.Except coal as the primary energy, secondary energy sources (regenerated resources) become developing focus gradually, as biomass power generation, garbage power etc., are faced with the removing pollutant problem of heavy metal Hg in the combustion product gases equally in these processes.The pollution control problem that this shows mercury is the SO that continues
2Get the problem of human concern with another fiducial value after the NOx.
Known domestic and international control method to gaseous state trace simple substance mercury mainly concentrates on adsorbents adsorb and removes the aspect.What wherein study more comparatively maturation is exactly the charcoal absorption technology.Can be by following dual mode with the mercury in the charcoal absorption flue gas: a kind of powdered active carbon that before particulate removal device, sprays into; Another kind is that flue gas is passed through activated carbon adsorption bed.Directly adopt active carbon adsorption removal of mercury efficient higher, also often be injected into some chemical substances in the activated carbon, the common chemical material has the compound of iodine, chlorine, bromine and sulphur etc., in order to the suction-operated of enhanced activity carbon to simple substance mercury.At present removing of simple substance mercury mainly concentrated on the adsorbent Study on Additive.The researcher wishes to increase the adsorbance of adsorbent to simple substance mercury greatly by adding certain reagent, though research has also obtained certain achievement.But owing to utilize charcoal absorption method cost too high, coal fired power plant is difficult to bear, and modified activated carbon has increased the cost of active carbon on the one hand, and the reason owing to technical elements is difficult to large-scale manufacturing again on the other hand.So become the obstacle that this technology is further applied.
In addition, the flying dust that produces in the coal-fired process also can adsorb the mercury in the flue gas, and flying dust also is a key factor that influences the form distribution of mercury in the flue gas.Studies show that the phosphorus content height is very favourable to the absorption of mercury in the flying dust.But also have research to think, the phosphorus content that increases considerably flying dust can not improve the ability of absorption mercury.
Administer the bigger U.S. of research investment at the coal-fired flue-gas mercury pollution, EPA (EPA) has adopted calcium base class material (as CaO, Ca (OH)
2, CaCO
3, CaSO
4.2H
2O etc.) research mercury removes.Discover that calcium base class material has much relations, Ca (OH) to the chemical species that mercury in the removal efficiency of mercury and the flue gas exists
2To HgCL
2Adsorption efficiency can reach 85%, the alkaline adsorbent that contains CaO is to HgCL
2Adsorption effect also fine, but Ca-base adsorbent is but very low to the adsorption efficiency of simple substance mercury.
Patent of invention CN1059673A invents a kind of HZSM-5 zeolite/vermiculite catalyst, be a kind of with the zeolite new zeolite catalyst of embedding life on natural vermiculite organically, be applied to the isomerization of dimethylbenzene, contain isomerization, toluene disproportionation, methanol toluene alkylation and the propylene aromatization of the dimethylbenzene of ethylbenzene.
Patent of invention CN101049942A invents a kind of hydrosol of vermiculite and its production and application, can evenly disperse in meeting material, can be applied directly to various material surfaces, material is formed hydrosol of vermiculite of effective protection and its production and application.Be mainly used in the fresh-keeping packaging material of fire-proof heat-insulating material, vegetable and fruit, dyeing waste water, the processing of waste water such as heavy metal-containing waste water.
Three, summary of the invention
The object of the present invention is to provide a kind of preparation method of transition metal compound loaded vermiculite absorbent, with the vermiculite original soil, transistion metal compound and hydrochloric acid or nitric acid mix in proportion, flood, obtain being applicable to the adsorbent of coal-fired flue-gas or the central micro-gaseous elemental mercury adsorption cleaning of other industrial tail gas after the drying.
The present invention implements by following technical scheme:
The used vermiculite of the present invention is commercially available common vermiculite in flake, and Main Ingredients and Appearance wt% is SiO
237～42, Al
2O
39～17, Fe
2O
35～18, MgO 11～23.
1). with drying and crushing after the vermiculite flotation removal of impurities, be ground to≤0.074mm;
2). concentrated hydrochloric acid or red fuming nitric acid (RFNA) are diluted with 5-10 times of deionized water, and get granularity then and be the transistion metal compound particle of 0.052～0.074mm and vermiculite and dilution back hydrochloric acid or nitric acid by 1: the weight ratio of 4-20: 10-60 mixes, and floods 2-6 hour;
3). dipping back material places resistance furnace to activate 20hr-24hr under 105～110 ℃ of conditions, taking-up is ground to≤0.034mm, places resistance furnace to dry by the fire 2hr-4hr more once more under the uniform temp condition, to moisture be below the 5wt%, obtain the adsorbent finished product, place drier standby.
The concentration of described concentrated hydrochloric acid or red fuming nitric acid (RFNA) is 98wt%; Described transistion metal compound is one or both in copper chloride, iron chloride, manganese nitrate and the potassium permanganate;
With transistion metal compound such as copper chloride and hydrochloric acid vermiculite is carried out impregnation process, vermiculite is after acid treatment on the one hand, impurity content reduces in the passage, the duct is dredged, increased specific area, owing to vermiculite wafer breakage under the effect of interlayer solvent, present the porous feature simultaneously, help the diffusion of adsorption molecule; In addition, the little H of volume
+Replaced the K between argillic horizon
+, Na
+, Ca
2+, Mg
2+Plasma increases pore volume, and the interlayer bonding force weakens, and interlamellar spacing increases, and absorption property improves.Adding copper chloride on the other hand is the interchangeability of utilizing vermiculite construction unit interlayer ion or molecule, bivalent cupric ion enters the vermiculite interlamination region, for absorption simple substance mercury provides more active site position, make adsorption process except that physical absorption, comparatively strong chemisorbed process has also taken place, and chemical equation is as follows:
2CuCl
2+Hg→HgCl
2+2CuCl
Utilize copper chloride and hydrochloric acid also to be equivalent to vermiculite has been carried out the operation of notes chlorine, this can increase the adsorption capacity of vermiculite greatly.What the vermiculite original soil mainly took place is physical absorption, and the vermiculite absorbent after the modification when physical absorption takes place chemisorbed has taken place also.
With the prepared adsorbent of the method, to containing micro-simple substance mercury (＜100ug/m
3) tail gas clean-up the time, the adsorption capacity of 25 ℃ of-35 ℃ of simple substance mercury can reach 180ug/g-250ug/g, and its equilibrium adsorption capacity of unmodified vermiculite is 1.019ug/g-1.85ug/g, be under the similarity condition with the 35-45 of charcoal absorption doubly.This achievement is applicable to the occasion of mercury emissions control in the flue tail gas, as coal-burning power plant, garbage burning boiler and some Chemical Manufacture producers.
Advantage of the present invention and good effect
The present invention is directed to micro-gaseous elemental mercury is difficult to remove, the acticarbon expense is too high, difficult problems such as the coal-burning power plant is difficult to bear propose the technical thought with transition metal oxide loaded vermiculite absorbent adsorbing and removing trace gaseous elemental mercury, thereby the difficult Hg that removes
0Removed.By studies show that its efficient that removes mercury of vermiculite absorbent after the modification can reach 180ug/g-250ug/g, be under the similarity condition with the 35-60 of charcoal absorption doubly, so utilizing vermiculite is favourable as the adsorbent of coal-fired flue-gas mercury, specific activity carbon has better applicability.This adsorbent can be widely used in the adsorption cleaning of micro-gaseous elemental mercury in coal-fired flue-gas and other industrial waste gases.
Four, the specific embodiment
Further specify the solution of the present invention and effect below by embodiment.
Embodiment 1: vermiculite Main Ingredients and Appearance wt% is: SiO
232.45, Al
2O
315.53, Fe
2O
323.85 MgO 12.85, CaO 2.28, K
2O 2.36, drying and crushing after the flotation removal of impurities, grinding≤0.075mm.Taking by weighing the 2g vermiculite mixes by following proportioning: distilled water 5.0ml+98wt% hydrochloric acid 0.5ml+CuCl
2Solid 0.1g+ vermiculite 2g; Stir, flooded 4 hours, place it in then and place resistance furnace under 105 ℃～110 ℃ conditions, to activate 20h in the container, take out then and be milled to≤0.0345mm, be positioned over once more and obtain the finished product adsorbent behind the baking 2h in the resistance furnace and place drier standby.
Embodiment 2: vermiculite original soil composition: SiO
232.45%, Al
2O
315.53%, Fe
2O
323.85%, MgO12.85%, CaO2.28%, K
2O2.36%, drying and crushing after the flotation removal of impurities, grind, take by weighing the 2g vermiculite, manganese nitrate is mixed with 50wt% solution with deionized water, mix by following proportioning again: manganese nitrate solution 4.8ml+ nitric acid 0.4ml+ potassium permanganate 0.1g+ vermiculite original soil 2g, stir, flooded 6 hours, place it in then and place resistance furnace under 110 ℃ of conditions, to activate 24h in the container, take out then and grind, be positioned over once more and obtain the finished product adsorbent behind the baking 2h in the resistance furnace and place drier standby.
Embodiment 3: vermiculite absorbent of the present invention and the contrast of acticarbon adsorption capacity.Press example 1 prepared adsorbent, adsorption conditions is mercury entrance concentration 34.8ug/m
3, reaction velocity 7000hr
-1, adsorption temp is selected 25 ℃-30 ℃ for use, and the active carbon adsorption capacity is the 5.2ug/g adsorbent as a result, and the mercury adsorption capacity of adsorbent of the present invention is the 208.6ug/g adsorbent.
Embodiment 4: vermiculite absorbent of the present invention and the contrast of vermiculite original soil adsorbents adsorb ability.Press example 2 preparation adsorbents, adsorption conditions is mercury entrance concentration 34.8ug/m
3, reaction velocity 7000hr
-1, 35 ℃ of reaction temperatures.The mercury adsorption capacity of adsorbent of the present invention is the 184ug/g adsorbent, and adsorption capacity only is 1.16ug/g under the unmodified vermiculite original soil similarity condition.
Claims (4)
1, a kind of preparation method of transition metal compound loaded vermiculite absorbent is characterized in that: it is implemented by following technical scheme:
1). with drying and crushing after the vermiculite flotation removal of impurities, be ground to≤0.074mm;
2). concentrated hydrochloric acid or red fuming nitric acid (RFNA) are diluted with 5-10 times of deionized water, and get granularity then and be the transistion metal compound particle of 0.052～0.074mm and vermiculite and dilution back hydrochloric acid or nitric acid by 1: the weight ratio of 4-20: 10-60 mixes, and floods 2-6 hour;
3). dipping back material places resistance furnace to activate 20hr-24hr under 105～110 ℃ of conditions, takes out to be ground to≤0.034mm, places resistance furnace to dry by the fire 2hr-4hr more once more under the uniform temp condition, obtains the adsorbent finished product.
2, the preparation method of transition metal compound loaded vermiculite absorbent according to claim 1 is characterized in that: described transistion metal compound is one or both in copper chloride, iron chloride, manganese nitrate and the potassium permanganate.
3, the preparation method of transition metal compound loaded vermiculite absorbent according to claim 1 is characterized in that: the concentration of described concentrated hydrochloric acid or red fuming nitric acid (RFNA) is 98wt%.
4, according to the preparation method of each described transition metal compound loaded vermiculite absorbent among the claim 1-4, it is characterized in that: described vermiculite main chemical wt% is SiO
237～42, Al
2O
39～17, Fe
2O
35～18, MgO 11～23.
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|---|---|---|---|
| CNA2008100589294A CN101357322A (en) | 2008-09-18 | 2008-09-18 | Preparation method of transition metal compound loaded vermiculite absorbent |
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|---|---|---|---|
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|---|---|
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ID=40330006
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688819A (en) * | 2016-04-07 | 2016-06-22 | 安庆师范学院 | Adsorbent for removing elemental mercury from coal gas and preparation method of adsorbent for removing elemental mercury from coal gas |
| CN105967319A (en) * | 2016-05-30 | 2016-09-28 | 安庆丰源化工有限公司 | Fluorine chemical wastewater treating agent and preparation method thereof |
| CN106492805A (en) * | 2016-10-25 | 2017-03-15 | 安庆师范大学 | Fe2O3/ flyash attapulgite catalyst and its for removing Hg in coal gas0Method |
| CN111686681A (en) * | 2020-05-28 | 2020-09-22 | 重庆大学 | Modified fly ash adsorbent for flue gas demercuration and preparation method thereof |
| CN112691638A (en) * | 2020-12-08 | 2021-04-23 | 广西博世科环保科技股份有限公司 | PRB filler modified based on catalyst filter residue and preparation method thereof |
| CN114433009A (en) * | 2022-01-26 | 2022-05-06 | 南昌大学 | Vermiculite material for adsorbing copper ions and preparation method and application thereof |
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2008
- 2008-09-18 CN CNA2008100589294A patent/CN101357322A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105688819A (en) * | 2016-04-07 | 2016-06-22 | 安庆师范学院 | Adsorbent for removing elemental mercury from coal gas and preparation method of adsorbent for removing elemental mercury from coal gas |
| CN105967319A (en) * | 2016-05-30 | 2016-09-28 | 安庆丰源化工有限公司 | Fluorine chemical wastewater treating agent and preparation method thereof |
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| CN111686681A (en) * | 2020-05-28 | 2020-09-22 | 重庆大学 | Modified fly ash adsorbent for flue gas demercuration and preparation method thereof |
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