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A kind of treatment method of carbon-based metal organic framework oxide catalytic flue gas denitrification

A metal-organic framework and organic framework technology, applied in the field of environmental protection science, can solve problems such as disadvantages and reduce energy consumption, and achieve the effect of saving costs and reducing energy consumption

Active Publication Date: 2019-07-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Moreover, in the current desulfurization and denitrification process, the tail gas discharged from the reaction equipment is firstly treated by a desulfurization device, and then denitrified. The temperature of the tail gas after desulfurization is generally lower than 200°C. For denitrification at a temperature higher than 200°C, it is necessary to heat up the flue gas after desulfurization, which is not conducive to reducing energy consumption in industrialization. Therefore, subsequent denitrification at a temperature lower than 200°C is more suitable for energy saving in industrialization

Method used

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  • A kind of treatment method of carbon-based metal organic framework oxide catalytic flue gas denitrification
  • A kind of treatment method of carbon-based metal organic framework oxide catalytic flue gas denitrification
  • A kind of treatment method of carbon-based metal organic framework oxide catalytic flue gas denitrification

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Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Cu z O / C, 0

[0031] Load 10g of catalyst Cu in the reactor of the tubular resistance furnace z O / C, first pass nitrogen gas for 5 minutes, then start to heat up, and simultaneously pass a mixed gas of carbon monoxide and nitrogen monoxide (the volume percentage of carbon monoxide is 30%, the volume percentage of nitrogen monoxide is 30%, and the rest is nitrogen), and the space velocity is 12000mL / (g·h), the exhaust gas is detected by the flue gas analyzer and then passed into lime water for recovery. When the denitrification rate is close to 100%, the constant temperature is maintained. The denitrification efficiency is 100% when the temperature is 174°C, N 2 The recovery rate is 95.3%, indicating that it has a good low-temperature catalytic denitrification effect.

Embodiment 2

[0032] Example 2: Sr y O / Cu z O / C, 0

[0033] Load 10g Sr in the reactor of tube resistance furnace y O / Cu z O / C catalyzer, nitrogen gas is first passed 5 minutes, then starts to heat up, passes into carbon monoxide and nitrogen dioxide mixed gas simultaneously (the volume percentage of carbon monoxide is 60%, the volume percentage of nitrogen dioxide is 30%, and the rest is nitrogen), and the space velocity is 12000mL / (g h), the exhaust gas is detected by the flue gas analyzer and then passed into lime water for recovery. When the denitrification rate is close to 100%, the temperature is kept constant. The denitrification efficiency is 100% when the temperature is 172°C, N 2 The recovery rate is 96.1%, indicating that it has a good low-temperature catalytic denitrification effect.

Embodiment 3

[0034] Example 3: Ni x O / Fe y O / Co z O / C, 0

[0035] Load 10g Ni into the reactor of the tubular resistance furnace x O / Fe y O / Co z O / C catalyzer, lead nitrogen 5 minutes earlier, then begin to heat up, pass into carbon monoxide and nitrogen monoxide mixed gas simultaneously (volume percentage of carbon monoxide is 30%, the volume percentage of nitrogen monoxide is 30%, all the other are nitrogen), space velocity is 10000mL / (g h), the exhaust gas is detected by the flue gas analyzer and then passed into lime water for recovery. When the denitrification rate is close to 100%, the constant temperature is maintained. The denitrification efficiency is 99.9% when the temperature is 102°C, N 2 The recovery rate is 95.8%, indicating that it has a good low-temperature catalytic denitrification effect.

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Abstract

The invention provides a treatment method for flue gas denitrification by catalysis of a carbon-based metal organic framework type oxide. According to the invention, a metal organic framework material is calcined in weak reduction atmosphere to obtain a carbon-based metal organic framework type oxide catalyst, and a redox reaction is carried out on carbon monoxide and flue gases of nitric oxide or nitrogen dioxide at low temperature through the catalyst, so that carbon monoxide and nitric oxide or nitrogen dioxide are respectively converted to carbon dioxide and nitrogen gas, and exhaust gases are recycled through lime water to achieve low-temperature catalysis denitrification and treatment on wastes by using wastes. The denitrification efficiency is 99.9% or above, the nitrogen recovery rate is 95% or above and the exhaust gases reach the existing emission standards.

Description

technical field [0001] The invention belongs to the field of environmental protection science and relates to a treatment method for flue gas denitrification catalyzed by carbon-based metal organic framework oxides. Background technique [0002] Flue gas denitrification is one of the urgent problems in the field of flue gas environmental protection. At present, the widely used denitrification method in industrialization is based on NH 3 is the reducing agent and V 2 o 5 +WO 3 (MoO 3 ) / TiO 2 It is the selective catalytic reduction of the catalyst, but the active temperature window of its industrial application is between 300°C and 400°C, and its lifespan is limited by SO 2 Moreover, only a few foreign manufacturers have the key technology for the synthesis of titanium dioxide used in the production of denitrification catalysts, resulting in the price of catalysts accounting for 40% to 60% of the investment in the entire denitrification system. Some scholars use metal-or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/76B01D53/56B01J23/72B01J23/78B01J23/755
CPCB01D53/76B01D53/8628B01D2251/204B01J23/72B01J23/755B01J23/78B01J37/086
Inventor 何汉兵秦毅红黄磊
Owner CENT SOUTH UNIV