CN103007953A - Preparation method of manganese-copper composite nitrogen monoxide normal-temperature catalyst - Google Patents
Preparation method of manganese-copper composite nitrogen monoxide normal-temperature catalyst Download PDFInfo
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- CN103007953A CN103007953A CN2012105361045A CN201210536104A CN103007953A CN 103007953 A CN103007953 A CN 103007953A CN 2012105361045 A CN2012105361045 A CN 2012105361045A CN 201210536104 A CN201210536104 A CN 201210536104A CN 103007953 A CN103007953 A CN 103007953A
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- nitric oxide
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Abstract
The invention provides a preparation method of a manganese-copper composite nitrogen monoxide normal-temperature catalyst. The prepared catalyst is applicable to environmental conditions of normal temperature and pressure and low concentration (NO<=50ppm). The preparation method is characterized by comprising the following steps: taking active aluminum oxide powder as a carrier, impregnating through an equal-volume method to carry a mixed solution of manganese chloride, copper chloride and ammonia water, and drying at 120-150 DEG C to obtain the manganese-copper composite nitrogen monoxide normal-temperature catalyst, thus realizing the normal-temperature catalytic oxidation of nitrogen monoxide. The method has the characteristics of simple preparation process, high catalytic oxidation efficiency and the like.
Description
Technical field
The present invention relates to the preparation method of a kind of nitric oxide constant temperature catalyzing agent, particularly relate to the preparation method of the compound nitric oxide constant temperature catalyzing of a kind of copper-manganese agent, be applied to the depollution of environment field that the NOx gas pollutant is processed.
Background technology
In various atmosphere pollutions, NO
XPollution and the harm that causes can not be ignored.NOx comes from fuel combustion mostly, i.e. vehicle exhaust, Industrial Stoves emission etc.The NOx purified treatment can be divided into dry method and wet method by technique.Dry method comprises non-catalytic reduction method, catalytic reduction method, absorption method etc.; Wet method comprises acid absorption, alkali absorption, oxidation absorption etc.
Oxidation absorption NOx is one of current research direction under the excess oxygen.Because 90%～95% is NO in the combustion product gases, and NO is not absorbed in water or in the alkali lye except generating complex compound.In order effectively to administer NOx, need NO partly is oxidized to NO
2So, need to seek a kind of effective catalyst and NO be oxidized to the NO that is easier to process
2, absorb with adsorbent again.
In the nitric oxide Catalytic Oxidation, document discloses a kind of take mesoporous silicon oxide as carrier, one or both mixtures of potassium, molybdenum are doping component, platinum is active component, adopt the catalyst of the catalytic oxidation nitrogen oxides in effluent of equal-volume step impregnation method preparation, but its technique is complicated, and reaction temperature is higher at 150～300 ℃.Chinese patent CN101352645 discloses a kind of flue gas catalytic oxidation denitration technique, adopts with TiO
2Or ZrO
2-TiO
2Be carrier, Co is the catalyst of active component, but its described reaction temperature is too high equally, is not suitable for the NOx purified treatment under the normal temperature condition.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides the preparation method of the compound nitric oxide constant temperature catalyzing of a kind of copper-manganese agent.
The preparation method of the compound nitric oxide constant temperature catalyzing of a kind of copper-manganese agent, the gained catalyst is applicable to normal temperature and pressure, the low concentration (environmental condition of NO≤50ppm), it is characterized in that, take the active oxidation aluminium powder as carrier, by the mixed solution of equi-volume process dip loading manganese chloride, copper chloride and ammoniacal liquor, after 120 ℃～150 ℃ dryings, make the agent of the compound nitric oxide constant temperature catalyzing of copper-manganese.
Described manganese chloride, or the mol ratio of copper chloride is not less than 20% of total amount.
The mixed solution of described manganese chloride and copper chloride must drip ammoniacal liquor, and required bath temperature is 50 ℃～80 ℃ in the dropping whipping process, and the pH value of mixed solution is 8.0.
The dip time of described active oxidation aluminium powder in mixed solution is 5～8 hours, and catalyst is 120 ℃～150 ℃ dryings, and be 18～24 hours drying time.
Compared with prior art, the present invention has simple, the catalytic oxidation efficient high of technique, and NO oxidation absorption efficiency is significantly improved.
Catalyst performance evaluation is carried out in column type glass tube reactor, and reaction gas volume air speed (GHSV) is 25000h
-1, catalyst amount 5ml, reaction is carried out under the normal temperature and pressure environment
The present invention is take the aluminium oxide that is untreated as the comparative catalyst, and unstripped gas NO concentration is 50ppm, take air as carrier gas, and 25～30 ℃ of reaction temperatures, relative humidity 30～45%, the testing time is 3h.After saturated through about 0.5h absorption, measuring the NO catalytic conversion is 0～1%, basic non-activity.
The below elaborates to embodiments of the invention: present embodiment is implemented under take technical solution of the present invention as prerequisite, has provided detailed embodiment and operating process, but that protection scope of the present invention is not limited to is following
The specific embodiment
Embodiment 1:
Take by weighing respectively 0.025mol copper chloride and manganese chloride, it fully is dissolved in the 10ml deionized water;
Mentioned solution is placed 50 ℃～80 ℃ water-baths, drips ammonia spirit and strong agitation, to pH value of solution to reaching 8.0;
Take by weighing the about 6g of 10ml(), 20～40 purpose active oxidation aluminium powders, with alumina powder normal temperature incipient impregnation 5h in mentioned solution, then 120 ℃ of dry 24h can obtain described nitric oxide catalyst.
Made catalyst is carried out catalytic performance test according to the afore-mentioned test condition, and measuring NO catalytic oxidation efficient is that catalytic effect is basicly stable in 75%, the 3h.
Embodiment 2:
Take by weighing respectively 0.025mol copper chloride and 0.01mol manganese chloride, it fully is dissolved in the 10ml deionized water;
Mentioned solution is placed 50 ℃～80 ℃ water-baths, drips ammonia spirit and strong agitation, to pH value of solution to reaching 8.0;
Take by weighing the about 6g of 10ml(), 20～40 purpose active oxidation aluminium powders, with alumina powder normal temperature incipient impregnation 5h in mentioned solution, then 120 ℃ of dry 24h can obtain described nitric oxide catalyst.
Made catalyst is carried out catalytic performance test according to the afore-mentioned test condition, and measuring NO catalytic oxidation efficient is that catalytic effect is basicly stable in 68%, the 3h.
Embodiment 3:
Take by weighing respectively 0.02mol copper chloride and 0.02mol manganese chloride, it fully is dissolved in the 10ml deionized water;
Mentioned solution is placed 50 ℃～80 ℃ water-baths, drips ammonia spirit and strong agitation, to pH value of solution to reaching 8.0;
Take by weighing the about 6g of 10ml(), 20～40 purpose active oxidation aluminium powders, with alumina powder normal temperature incipient impregnation 8h in mentioned solution, then 150 ℃ of dry 18h can obtain described nitric oxide catalyst.
Made catalyst is carried out catalytic performance test according to the afore-mentioned test condition, and measuring NO catalytic oxidation efficient is that catalytic effect is basicly stable in 70%, the 3h.
Embodiment 4:
Take by weighing respectively 0.01mol copper chloride and 0.01mol manganese chloride, it fully is dissolved in the 10ml deionized water;
Mentioned solution is placed 50 ℃～80 ℃ water-baths, drips ammonia spirit and strong agitation, to pH value of solution to reaching 8.0;
Take by weighing the about 6g of 10ml(), 20～40 purpose active oxidation aluminium powders, with alumina powder normal temperature incipient impregnation 5h in mentioned solution, then 150 ℃ of dry 24h can obtain described nitric oxide catalyst.
Made catalyst is carried out catalytic performance test according to the afore-mentioned test condition, and measuring NO catalytic oxidation efficient is that catalytic effect is basicly stable in 60%, the 3h.
Embodiment 5:
Take by weighing respectively 0.025mol copper chloride and 0.02mol manganese chloride, it fully is dissolved in the 10ml deionized water;
Mentioned solution is placed 50 ℃～80 ℃ water-baths, drips ammonia spirit and strong agitation, to pH value of solution to reaching 8.0;
Take by weighing the about 6g of 10ml(), 20～40 purpose active oxidation aluminium powders, with alumina powder normal temperature incipient impregnation 5h in mentioned solution, then 150 ℃ of dry 24h can obtain described nitric oxide catalyst.
Made catalyst is carried out catalytic performance test according to the afore-mentioned test condition, and measuring NO catalytic oxidation efficient is that catalytic effect is basicly stable in 70%, the 3h.
Claims (4)
1. the preparation method of the compound nitric oxide constant temperature catalyzing of copper-manganese agent, the gained catalyst is applicable to normal temperature and pressure, the low concentration (environmental condition of NO≤50ppm), it is characterized in that, take the active oxidation aluminium powder as carrier, by the mixed solution of equi-volume process dip loading manganese chloride, copper chloride and ammoniacal liquor, after 120 ℃～150 ℃ dryings, make the agent of the compound nitric oxide constant temperature catalyzing of copper-manganese.
2. the preparation method of the compound nitric oxide constant temperature catalyzing of described a kind of copper-manganese agent according to claim 1 is characterized in that, described manganese chloride, or the mol ratio of copper chloride is not less than 20% of total amount.
3. the preparation method of the compound nitric oxide constant temperature catalyzing of described a kind of copper-manganese agent according to claim 1, it is characterized in that, the mixed solution of manganese chloride and copper chloride must drip ammoniacal liquor, and required bath temperature is 50 ℃～80 ℃ in the dropping whipping process, and the pH value of mixed solution is 8.0.
4. the preparation method of the compound nitric oxide constant temperature catalyzing of described a kind of copper-manganese agent according to claim 1, it is characterized in that, the dip time of described active oxidation aluminium powder in mixed solution is 5～8 hours, and catalyst is 120 ℃～150 ℃ dryings, and be 18～24 hours drying time.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933969A (en) * | 2014-04-15 | 2014-07-23 | 华东理工大学 | Monolithic nitric oxide low-temperature oxidation catalyst and preparation method thereof |
| CN115739173A (en) * | 2022-11-15 | 2023-03-07 | 昆明理工大学 | Denitration catalyst with stable structure, preparation method and application thereof, monolithic catalyst and application thereof |
-
2012
- 2012-12-13 CN CN2012105361045A patent/CN103007953A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933969A (en) * | 2014-04-15 | 2014-07-23 | 华东理工大学 | Monolithic nitric oxide low-temperature oxidation catalyst and preparation method thereof |
| CN103933969B (en) * | 2014-04-15 | 2016-05-18 | 华东理工大学 | A kind of monolithic devices nitric oxide low-temperature oxidation catalyst and preparation method thereof |
| CN115739173A (en) * | 2022-11-15 | 2023-03-07 | 昆明理工大学 | Denitration catalyst with stable structure, preparation method and application thereof, monolithic catalyst and application thereof |
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Application publication date: 20130403 |