CN109692662A - A kind of ammonia gas absorption agent and preparation method thereof - Google Patents
A kind of ammonia gas absorption agent and preparation method thereof Download PDFInfo
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- CN109692662A CN109692662A CN201710994844.6A CN201710994844A CN109692662A CN 109692662 A CN109692662 A CN 109692662A CN 201710994844 A CN201710994844 A CN 201710994844A CN 109692662 A CN109692662 A CN 109692662A
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- absorption agent
- gas absorption
- ammonia gas
- active carbon
- ammonia
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
- B01J20/0288—Halides of compounds other than those provided for in B01J20/046
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
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- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a kind of ammonia gas absorption agent comprising the active component of 6~20wt% and the carrier of 80~94wt%, the active component are transition metal chloride, and the carrier is active carbon.A kind of preparation method of ammonia gas absorption agent, it the steps include: for active carbon to be immersed in NaOH solution, it filters off spare after maceration extract is dried, at least one of transition metal chloride is configured to certain density ethanol solution, active carbon after drying is added in ethanol solution and is sufficiently impregnated, roasting obtains required adsorbent in the absence of air conditions after elimination maceration extract.Ammonia gas absorption agent produced by the present invention can largely adsorb ammonia under room temperature and cryogenic conditions, and adsorption capacity highest can achieve 0.52g/g.Adsorbent desorbs easily after adsorbing ammonia, and adsorbent is Ke Xunhuanliyong, environmentally protective.
Description
Technical field
The invention belongs to technical field of environmental purification, and in particular to a kind of ammonia gas absorption agent and preparation method thereof.
Background technique
Ammonia is a kind of important industrial chemicals, using very extensive in production and living.And according to experts and scholars to PM2.5
Ingredient and its origin cause of formation carries out the study found that ammonia is one of the arch-criminal that haze is formed.In addition, interior architecture and decoration in recent years
The a large amount of volatile organic matters of materials'use, cause indoor ammonia pollution, have seriously affected the health of people, therefore how to subtract
The discharge of few ammonia, the content for reducing ammonia in environment become the problem of urgently researching and solving at present.
Discharge watershed management is broadly divided into the improvement of ammonia and playground is administered, the method for administering ammonia at present is main
There are plant absorption method, photocatalysis Decomposition method, combustion method, acidic aqueous solution absorption process, absorption method and microorganism decomposition method.Acid water
Solution absorption method can generate secondary pollution, and the equipment investment of combustion method is high, control bad reaction condition and be also easy to produce secondary dirt
Dye, for photocatalysis Decomposition method to the more demanding of use condition, the treating capacity of plant absorption method and microorganism decomposition method is small, is only applicable in
Low concentration environment, and absorption method includes physical absorption and chemisorption, easy to operate, material can recycle, and be a kind of high
The processing method of effect, green.Active carbon, aluminium oxide, silica gel, molecular sieve are currently used adsorbents.
102728159 A of patent CN provides a kind of method for Ammonia recovery in MOCVD tail gas, uses
Adsorbent is alkaline earth metal chloride, mainly calcium chloride, magnesium chloride, strontium chloride, can be very good absorption ammonia.But it should
Patent, as adsorbent, is difficult to form stable porous material, the contact surface with ammonia using pure alkaline earth metal chloride
Product is small, and expansion, agglomeration are easy during Adsorption and desorption, influences adsorption energy.
Qingdao Bo Ruilin new material Co., Ltd, which has submitted, a series of to be by various methods modified to make cinder
The Chinese patent of standby cheap ammonia gas absorption agent, such as patent CN104069790A, CN104084111A, CN104084133A, discovery
It can not report the adsorption effect of the adsorbent by Adsorption ammonia in the series of patents document.
Summary of the invention
The object of the present invention is to provide a kind of ammonia gas absorption agent and preparation method thereof, have by adsorbent prepared by this method
Have that treatment effeciency is high, ammonia gas absorption amount is big, easily desorption, the characteristics of being used repeatedly.
The technical solution adopted by the present invention is that:
A kind of ammonia gas absorption agent, which is characterized in that the carrier of active component and 80~94wt% including 6~20wt%,
The active component is transition metal chloride, and the carrier is active carbon.
Preferably, the transition metal chloride is at least one of copper chloride, cobalt chloride and iron chloride.
Preferably, the active carbon is activated carbon from activated sludge.
A kind of preparation method of such as above-mentioned ammonia gas absorption agent, comprising the following steps:
(a) active carbon is dried, is added in NaOH solution after being cooled to room temperature, 8~20h is stirred at 20~40 DEG C,
Maceration extract is filtered off, is washed with deionized to neutrality, it is spare after dry 2~5h at 90~120 DEG C；
(b) by transition metal chloride wiring solution-forming；
(c) active carbon made from step (a) is added in the solution of transition metal chloride made from step (b), is soaked
3~8h of stain, filters out maceration extract, and it is spare to obtain fixed product A after dry 3~6h at 90~120 DEG C；
(d) solid product A made from step (c) is roasted at 500~700 DEG C to 1~2h in the absence of air conditions,
It can be prepared by the high-efficiency adsorbent for adsorbing ammonia.
Preferably, the shape of active carbon described in step (a) is powdered, indefinite form graininess, spherical, cylindric or piece
Shape.
Preferably, the mass fraction of NaOH solution described in step (a) is 30~45%.
Preferably, the mass fraction of transition metal chloride solution described in step (b) is not less than 5%.Up to it is saturated
Solution.
Preferably, step (d) it is described isolation air under conditions of under conditions of vacuum or gas shielding gas item
Under part.
Beneficial effects of the present invention:
1, carrier active carbon has very high specific surface area after treatment, and specific surface area is more than 1000m2/g (BET method),
It ensure that adsorption efficiency.
2, with ammonia chemisorption can occur for the active carbon after carrying transition metal chloride, and active force is larger, can be with
Ammonia is largely adsorbed under room temperature and cryogenic conditions, adsorption capacity highest can achieve 0.52g/g.
3, it desorbs and is easy after adsorbent absorption ammonia, desorption temperature is lower than 100 DEG C, a large amount of ammonias discharged in regenerative process
It can reuse, it is more environmentally protective.
Specific embodiment
Below with reference to specific example, the invention will be further described, in order to the understanding of the present invention, but not therefore
And limit the present invention.
In the present invention by weigh the variation for the quality for reacting front and back active carbon be calculated in adsorbent active component and
The mass percentage content of carrier.
The method that adsorbent specific surface is detected in the present invention is BET method.
Embodiment 1
(a) it takes the active carbon particle of 50g to dry, is cooled to room temperature, add it to 75ml NaOH solution (40% mass
Score) in, 12h is stirred at 25 DEG C, is filtered off maceration extract, is washed with deionized to neutrality, it is spare after 110 DEG C of dry 3h；
(b) iron chloride is configured to the solution that mass fraction is 8%；
(c) active carbon made from step (a) is added in ferric chloride solution made from step (b) and impregnates 3h, filter out leaching
Stain liquid, it is spare after 110 DEG C of dry 4h；
(d) under nitrogen protection by solid made from step (c), 1.5h is roasted at 600 DEG C, can be prepared by for adsorbing
The adsorbent of ammonia.
After measured, the adsorbent that embodiment 1 obtains, the mass percentage content of active component (iron chloride) are 9.3%,
The mass percentage content of carrier active carbon is 90.7%.The specific surface area of adsorbent is 1104m2/g。
The adsorbent obtained with embodiment 1 carries out adsorption experiment to ammonia, is computed, 1g adsorbent can adsorb 0.52g
Ammonia.
Embodiment 2
(a) the shaped activated carbon drying for taking 50g, is cooled to room temperature, adds it to 100ml NaOH solution (30% mass
Score) in, 12h is stirred at 25 DEG C, is filtered off maceration extract, is washed with deionized to neutrality, it is spare after 100 DEG C of dry 3h.
(b) copper chloride is made into saturated solution.
(c) active carbon made from step (a) is added in copper chloride solution made from step (b) and impregnates 8h, filter out leaching
Stain liquid, it is spare after 90 DEG C of dry 6h.
(d) under nitrogen protection by solid made from step (c), 2h is roasted at 500 DEG C, can be prepared by for adsorbing ammonia
The adsorbent of gas.
After measured, the mass percentage content of the adsorbent that embodiment 2 obtains, active component (copper chloride) is
19.3%, the mass percentage content of carrier active carbon is 80.7%.The specific surface area of adsorbent is 1021m2/g。
The adsorbent obtained with embodiment 2 carries out adsorption experiment to ammonia, is computed, 1g adsorbent can adsorb 0.38g
Ammonia.
Embodiment 3
(a) it takes the spherical activated charcoal of 50g to dry, is cooled to room temperature, add it to 50ml NaOH solution (45% mass
Score) in, 8h is stirred at 40 DEG C, is filtered off maceration extract, is washed with deionized to neutrality, it is spare after 100 DEG C of dry 3h.
(b) cobalt chloride is made into 10% solution.
(c) active carbon made from step (a) is added in cobalt chloride solution made from step (b) and impregnates 5h, filter out leaching
Stain liquid, it is spare after 110 DEG C of dry 3h.
(d) under nitrogen protection by solid made from step (c), 1h is roasted at 700 DEG C, can be prepared by for adsorbing ammonia
The adsorbent of gas.
After measured, the mass percentage content of the adsorbent that embodiment 3 obtains, active component (cobalt chloride) is
12.3%, the mass percentage content of carrier active carbon is 87.7%.The specific surface area of adsorbent is 1081m2/g。
The adsorbent obtained with embodiment 3 carries out adsorption experiment to ammonia, is computed, 1g adsorbent can adsorb 0.42g
Ammonia.
Claims (8)
1. a kind of ammonia gas absorption agent, which is characterized in that the carrier of active component and 80~94wt% including 6~20wt%, institute
Stating active component is transition metal chloride, and the carrier is active carbon.
2. ammonia gas absorption agent as described in claim 1, it is characterised in that the transition metal chloride is copper chloride, cobalt chloride
And at least one of iron chloride.
3. ammonia gas absorption agent as described in claim 1, it is characterised in that the active carbon is activated carbon from activated sludge.
4. a kind of preparation method of the ammonia gas absorption agent as described in claims 1 to 3 any one, comprising the following steps:
(a) active carbon is dried, is added in NaOH solution after being cooled to room temperature, 8~20h is stirred at 20~40 DEG C, filtered off
Maceration extract is washed with deionized to neutrality, spare after dry 2~5h at 90~120 DEG C；
(b) by transition metal chloride wiring solution-forming；
(c) active carbon made from step (a) is added in the solution of transition metal chloride made from step (b), dipping 3~
8h filters out maceration extract, and it is spare to obtain fixed product A after dry 3~6h at 90~120 DEG C；
(d) solid product A made from step (c) is roasted at 500~700 DEG C to 1~2h in the absence of air conditions
Ammonia gas absorption agent is made.
5. a kind of preparation method of ammonia gas absorption agent as claimed in claim 4, it is characterised in that: step (a) active carbon
Shape be powdered, indefinite form graininess, spherical, cylindric or sheet.
6. a kind of preparation method of ammonia gas absorption agent as claimed in claim 4, it is characterised in that: step (a) NaOH is molten
The mass fraction of liquid is 30~45%.
7. a kind of preparation method of ammonia gas absorption agent as claimed in claim 4, it is characterised in that: step (b) the transition gold
The mass fraction for belonging to chloride solution is not less than 5%.
8. a kind of preparation method of ammonia gas absorption agent as claimed in claim 4, it is characterised in that: step (d) isolation is empty
For under conditions of vacuum or under conditions of gas shield under conditions of gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710994844.6A CN109692662A (en) | 2017-10-23 | 2017-10-23 | A kind of ammonia gas absorption agent and preparation method thereof |
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| CN201710994844.6A CN109692662A (en) | 2017-10-23 | 2017-10-23 | A kind of ammonia gas absorption agent and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113117639A (en) * | 2021-05-27 | 2021-07-16 | 上海国瓷新材料技术有限公司 | Modified molecular sieve adsorbent and preparation method and application thereof |
| CN115845797A (en) * | 2022-10-31 | 2023-03-28 | 中国船舶重工集团公司第七一八研究所 | Gas adsorbent and preparation method and application thereof |
| CN116808776A (en) * | 2023-06-13 | 2023-09-29 | 平顶山学院 | Method for efficiently capturing ammonia by using porous material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113117639A (en) * | 2021-05-27 | 2021-07-16 | 上海国瓷新材料技术有限公司 | Modified molecular sieve adsorbent and preparation method and application thereof |
| CN115845797A (en) * | 2022-10-31 | 2023-03-28 | 中国船舶重工集团公司第七一八研究所 | Gas adsorbent and preparation method and application thereof |
| CN115845797B (en) * | 2022-10-31 | 2024-04-09 | 中国船舶重工集团公司第七一八研究所 | Gas adsorbent and preparation method and application thereof |
| CN116808776A (en) * | 2023-06-13 | 2023-09-29 | 平顶山学院 | Method for efficiently capturing ammonia by using porous material |
| CN116808776B (en) * | 2023-06-13 | 2024-02-13 | 平顶山学院 | Method for efficiently capturing ammonia by using porous material |
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