CN106984148A - A kind of method of low-temperature plasma synergistic catalysis oxidation various pollutants in fume - Google Patents

A kind of method of low-temperature plasma synergistic catalysis oxidation various pollutants in fume Download PDF

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Publication number
CN106984148A
CN106984148A CN201710269315.XA CN201710269315A CN106984148A CN 106984148 A CN106984148 A CN 106984148A CN 201710269315 A CN201710269315 A CN 201710269315A CN 106984148 A CN106984148 A CN 106984148A
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China
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catalyst
oxidation
solid
flue gas
temperature plasma
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CN201710269315.XA
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Inventor
沈伯雄
缪义进
高兰君
缪甘华
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Nantong Far Resistant Fiber Co Ltd
Hebei University of Technology
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Nantong Far Resistant Fiber Co Ltd
Hebei University of Technology
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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
    • B01D53/32—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 electrical effects other than those provided for in group B01D61/00
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B01D2255/2065—Cerium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/60—Heavy metals or heavy metal compounds
    • B01D2257/602—Mercury or mercury compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/818—Employing electrical discharges or the generation of a plasma
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

A kind of method of low-temperature plasma synergistic catalysis oxidation various pollutants in fume, flue gas SO is realized using low temperature plasma coupling solid catalysis oxidation2, NOxAnd Hg0Multi-pollutant co-oxidation, method is as follows：Low temperature plasma is set in flue gas before solid catalysis oxidation catalyst, the flue gas after action of plasma is aoxidized by solid catalysis oxidation catalyst bed again；Solid catalysis oxidation catalyst bed is carrier, major catalyst CeO by titanium dioxide built with solid catalyst, the solid catalyst2And co-catalyst V2O5、Fe2O3、Co2O3Or MnO2Composition.It is an advantage of the invention that：This method utilizes SO in low-temperature plasma synergistic heterogeneous catalyst co-oxidation flue gas2, NOxAnd Hg0Multi-pollutant, realizes combined highly effective rate oxidation of the multiple pollutant in a system, so as to provide necessary condition for the removing of follow-up high efficiency.

Description

A kind of method of low-temperature plasma synergistic catalysis oxidation various pollutants in fume
Technical field
The invention belongs to field of environmental technology, and in particular to a variety of in a kind of low-temperature plasma synergistic catalysis oxidation flue gas The method of pollutant.
Background technology
The energy resource structure of China is based on coal, and the burning of coal provides about 70% primary energy for China.Coal fires Burning the main gaseous contaminant of discharge includes SO2、NOxWith mercury etc., under conventional fired state, sulphur is mainly with SO2Mode is arranged Put, NOxPrimary discharge mode be NO (NO accounts for more than 90%).Mercury in coal-fired flue-gas has three kinds of forms：Elemental Mercury (Hg0), oxygen Change state mercury (Hg2+) and particle mercury (Hgp), elemental mercury from coal-fired flue gas is the principal mode of gas mercury.Oxidation state mercury (Hg2+) and Particle mercury (Hgp) easily removed by wet method system, but Elemental Mercury (Hg0) due to volatility height, it is difficult to be removed.Current SO2's Processing method is usually the method absorbed using alkaline matter, is divided into wet method and dry desulfurization, and wet desulphurization efficiency is higher than dry method. The processing method of nitrogen oxides has low NOx combustion, selective non-catalytic reduction method (SNCR) and selective catalytic reduction method (SCR), wherein SCR is current denitration efficiency highest method.Generally adsorbed in business using activated carbon is sprayed into flue gas Mercury, but because mercury in flue gas concentration is very low, it is necessary to consume substantial amounts of activated carbon.SO can be made using respective independent alternative2、NOxAnd mercury Gaseous contaminant obtains efficient removal in respective processing system, but one brought significantly has the disadvantage that each system is mutual Independent, whole set process is complicated, floor space is big, once invest and operating cost is high, brings very big to power plant or energy sector Economic pressures.It is achieved that SO2、NOxJoint removing with mercury gaseous contaminant is the development of coal-fired flue-gas pollutant abatement technology field Inexorable trend.
For SO in flue gas2, NOxAnd Hg0Catalysis oxidation there is the principle of general character, the present invention discloses one kind and utilizes low temperature SO in plasma body cooperative catalysis oxidation flue gas (120-350 DEG C)2, NO and mercury method.The innovative point of the present invention is using low SO in warm plasma collaboration heterogeneous catalyst catalysis oxidation flue gas (120-350 DEG C)2, NOxAnd Hg0Multi-pollutant, and traditional side Method compares, and the invention realizes combined highly effective rate oxidation of the multi-pollutant in a system, so as to be the removing of follow-up high efficiency There is provided necessary condition.
The content of the invention
The purpose of the present invention is there is problem for above-mentioned there is provided in a kind of low-temperature plasma synergistic catalysis oxidation flue gas The method of multiple pollutant, this method uses SO in low-temperature plasma synergistic catalysis oxidation flue gas2, NO and a variety of pollutions of mercury Thing, flue gas SO is realized using the oxidation of plasmon coupling solid catalysis2, NOxAnd Hg0Multi-pollutant co-oxidation, is follow-up efficient Rate removing provides necessary condition.
Technical scheme：
A kind of method of low-temperature plasma synergistic catalysis oxidation various pollutants in fume, utilizes low temperature plasma coupling Close solid catalysis oxidation and realize flue gas SO2, NOxAnd Hg0Multi-pollutant co-oxidation, method is as follows：
Low temperature plasma, low temperature plasma charged particle temperature are set in the flue gas before solid catalysis oxidation catalyst Spend for 1-10eV, the flue gas after action of plasma is aoxidized by solid catalysis oxidation catalyst bed again；Solid phase Catalyst for catalytic oxidation bed is carrier, major catalyst CeO by titanium dioxide built with solid catalyst, the solid catalyst2 And co-catalyst V2O5、Fe2O3、Co2O3Or MnO2The mass percentage content of each component is in composition, solid catalyst：It is main Catalyst is CeO210-15%, co-catalyst is 5-10%, and titania support is surplus；When catalytic bed interior reaction temperature is At 120-350 DEG C, this method is to SO in flue gas2, NO and Elemental Mercury oxidation efficiency be respectively 75%, 85% and more than 75%.
It is an advantage of the invention that：This method utilizes SO in low-temperature plasma synergistic heterogeneous catalyst co-oxidation flue gas2, NOxAnd Hg0Multi-pollutant, realizes combined highly effective rate oxidation of the multiple pollutant in a system, so as to be follow-up high efficiency Removing provides necessary condition.
Embodiment
Embodiment 1：
SO in a kind of low-temperature plasma synergistic catalysis oxidation flue gas2, NO and mercury method, specific method is：In solid phase Reaction of low temperature plasma device is set before catalyst for catalytic oxidation, and then flue gas enters by solid catalysis oxidation catalyst bed again Row oxidation；Solid catalysis oxidation catalyst bed built with solid catalyst, the solid catalyst by titania support, sponsor Agent CeO2And co-catalyst V2O is constituted, and the mass percent of each component is in solid catalyst：Major catalyst CeO215%, Co-catalyst V2O55%, titania support 80%；When the charged particle temperature of low temperature plasma is for 1-10eV, in catalytic bed When reaction temperature is 120-350 DEG C, this method is to SO in flue gas2, NO and Elemental Mercury oxidation efficiency be respectively 80%, 85% and 80%.
Embodiment 2：
SO in a kind of low-temperature plasma synergistic catalysis oxidation flue gas2, NO and mercury method, specific method is：In solid phase Reaction of low temperature plasma device is set before catalyst for catalytic oxidation, and then flue gas enters by solid catalysis oxidation catalyst bed again Row oxidation；Solid catalysis oxidation catalyst bed built with solid catalyst, the solid catalyst by titania support, sponsor Agent CeO2And co-catalyst Fe2O3The mass percent of each component is in composition, solid catalyst：Major catalyst CeO215%, co-catalyst Fe2O3For 10%, titania support 75%；When the charged particle temperature of low temperature plasma is 1- When 10eV, catalytic bed interior reaction temperature are 120-350 DEG C, this method is to SO in flue gas2, NO and Elemental Mercury oxidation efficiency difference For 88%, 89% and 85%.
Embodiment 3：
SO in a kind of low-temperature plasma synergistic catalysis oxidation flue gas2, NO and mercury method, specific method is：In solid phase Reaction of low temperature plasma device is set before catalyst for catalytic oxidation, and then flue gas enters by solid catalysis oxidation catalyst bed again Row oxidation；Solid catalysis oxidation catalyst bed built with solid catalyst, the solid catalyst by titania support, sponsor Agent CeO2And co-catalyst Co2O3The mass percent of each component is in composition, solid catalyst：Major catalyst CeO215%, co-catalyst Co2O3For 5%, titania support 80%；When the charged particle temperature of low temperature plasma is 1- When 10eV, catalytic bed interior reaction temperature are 120-350 DEG C, this method is to SO in flue gas2, NO and Elemental Mercury oxidation efficiency difference For 82%, 83% and 80%.
Embodiment 4：
SO in a kind of low-temperature plasma synergistic catalysis oxidation flue gas2, NO and mercury method, specific method is：In solid phase Reaction of low temperature plasma device is set before catalyst for catalytic oxidation, and then flue gas enters by solid catalysis oxidation catalyst bed again Row oxidation；Solid catalysis oxidation catalyst bed built with solid catalyst, the solid catalyst by titania support, sponsor Agent CeO2And co-catalyst MnO2The mass percent of each component is in composition, solid catalyst：Major catalyst CeO210%, co-catalyst MnO2For 10%, titania support 80%；When the charged particle temperature of low temperature plasma is 1- When 10eV, catalytic bed interior reaction temperature are 120-350 DEG C, this method is to SO in flue gas2, NO and Elemental Mercury oxidation efficiency difference For 80%, 81% and 75%.

Claims (1)

1. a kind of method of low-temperature plasma synergistic catalysis oxidation various pollutants in fume, it is characterised in that：Utilize low temperature Flue gas SO is realized in the oxidation of plasmon coupling solid catalysis2, NOxAnd Hg0Multi-pollutant co-oxidation, method is as follows：
Low temperature plasma is set in the flue gas before solid catalysis oxidation catalyst, and low temperature plasma charged particle temperature is 1-10eV, the flue gas after action of plasma is aoxidized by solid catalysis oxidation catalyst bed again；Solid catalysis Oxidation catalyst bed is carrier, major catalyst CeO by titanium dioxide built with solid catalyst, the solid catalyst2And Co-catalyst V2O5、Fe2O3、Co2O3Or MnO2The mass percentage content of each component is in composition, solid catalyst：Main catalytic Agent is CeO210-15%, co-catalyst is 5-10%, and titania support is surplus；When catalytic bed interior reaction temperature is 120- At 350 DEG C, this method is to SO in flue gas2, NO and Elemental Mercury oxidation efficiency be respectively 75%, 85% and more than 75%.
CN201710269315.XA 2017-04-24 2017-04-24 A kind of method of low-temperature plasma synergistic catalysis oxidation various pollutants in fume Pending CN106984148A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112774619A (en) * 2020-12-31 2021-05-11 杭州电子科技大学 Novel preparation process of high-efficiency flue gas demercuration adsorbent

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101028594A (en) * 2006-03-01 2007-09-05 中国科学院生态环境研究中心 Composite oxide catalyst for cryogenic selective catalystic reductic oxide nitrogen
CN101703875A (en) * 2009-11-09 2010-05-12 南京师范大学 Oxidizing method for removing gaseous elemental mercury in boiler fume
GB2479807A (en) * 2010-02-01 2011-10-26 Johnson Matthey Plc Three-way catalyst comprising extruded solid body.
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
CN103263845A (en) * 2013-06-08 2013-08-28 厦门大学 Simultaneous desulfation, denitration and mercury removal device
CN103463944A (en) * 2013-09-22 2013-12-25 山东大学 Electrostatic cooperative pollutant removing method and device
CN105327614A (en) * 2015-11-06 2016-02-17 河北工业大学 Method for combined removal of SO2, NOX and Hg pollutants in coal-fired flue gas
CN105727936A (en) * 2016-02-03 2016-07-06 甘肃天朗化工科技有限公司 Low-temperature sulfur-resistant denitration catalyst and preparation method thereof
CN106268223A (en) * 2016-09-22 2017-01-04 山东理工大学 A kind of method of low-temperature plasma synergistic catalyst of transition metal oxide oxidation mercury in flue gas

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101028594A (en) * 2006-03-01 2007-09-05 中国科学院生态环境研究中心 Composite oxide catalyst for cryogenic selective catalystic reductic oxide nitrogen
CN101703875A (en) * 2009-11-09 2010-05-12 南京师范大学 Oxidizing method for removing gaseous elemental mercury in boiler fume
GB2479807A (en) * 2010-02-01 2011-10-26 Johnson Matthey Plc Three-way catalyst comprising extruded solid body.
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
CN103263845A (en) * 2013-06-08 2013-08-28 厦门大学 Simultaneous desulfation, denitration and mercury removal device
CN103463944A (en) * 2013-09-22 2013-12-25 山东大学 Electrostatic cooperative pollutant removing method and device
CN105327614A (en) * 2015-11-06 2016-02-17 河北工业大学 Method for combined removal of SO2, NOX and Hg pollutants in coal-fired flue gas
CN105727936A (en) * 2016-02-03 2016-07-06 甘肃天朗化工科技有限公司 Low-temperature sulfur-resistant denitration catalyst and preparation method thereof
CN106268223A (en) * 2016-09-22 2017-01-04 山东理工大学 A kind of method of low-temperature plasma synergistic catalyst of transition metal oxide oxidation mercury in flue gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112774619A (en) * 2020-12-31 2021-05-11 杭州电子科技大学 Novel preparation process of high-efficiency flue gas demercuration adsorbent

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Application publication date: 20170728