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Catalyst for low-temperature synergistic degradation of dioxin and NOx and preparation method for catalyst

A technology of synergistic degradation and catalyst, applied in the direction of chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of dioxin and NOx purification effect and unexplained use temperature range, and achieve improvement Effect of redox ability, high mechanical strength, good sulfur resistance and mechanical strength

Inactive Publication Date: 2017-03-29
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent application CN201510290287.0 discloses a rare earth-based composite multi-component denitration and dedioxin catalyst and its preparation method. The catalyst uses titanium dioxide and silicon powder as carriers, and uses tungsten compounds, vanadium compounds, cerium compounds and The compound of lanthanum is the active component, but the purification effect of the catalyst on dioxin and NOx and the operating temperature range are not specified

Method used

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  • Catalyst for low-temperature synergistic degradation of dioxin and NOx and preparation method for catalyst
  • Catalyst for low-temperature synergistic degradation of dioxin and NOx and preparation method for catalyst
  • Catalyst for low-temperature synergistic degradation of dioxin and NOx and preparation method for catalyst

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Experimental program
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Effect test

Embodiment 1

[0056] Weigh 59 grams of titanium dioxide nanoparticles and 30 grams of titanium nanotubes, add excess water for impregnation, stir and mix evenly to obtain a catalyst carrier; finally dissolve 22.45 grams of cerium nitrate, 2.57 grams of ammonium metavanadate, and 0.21 grams of chloroplatinic acid in 80 ° C Prepare a solution in deionized water, add the above-mentioned catalyst carrier under strong stirring, continue stirring for 12 hours, then dry it, and finally bake it at 400°C for 3 hours.

[0057] Embodiment 1 makes the transmission electron microscope figure of catalyst such as figure 1 shown.

[0058] Embodiment 1 makes the XRD spectrogram of catalyst support such as figure 2 shown.

Embodiment 2

[0060] Weigh 22 grams of titanium dioxide nanoparticles and 50 grams of titanium nanotubes, add excess water for impregnation, stir and mix evenly to obtain a catalyst carrier; finally dissolve 20 grams of cerium oxide, 8 grams of vanadium pentoxide, and 0.1 gram of chloroplatinic acid at 60 ° C Prepare a solution in deionized water, add the above-mentioned catalyst carrier under strong stirring, continue to stir for 4 hours, then dry it, and finally bake it at 350°C for 3 hours.

Embodiment 3

[0062] Weigh 98 grams of titanium dioxide nanoparticles and 2 grams of titanium nanotubes, add excess water for impregnation, stir and mix evenly to obtain a catalyst carrier; finally dissolve 2.52 grams of cerium nitrate, 0.63 grams of ammonium metavanadate, and 0.25 grams of chloroplatinic acid at 80 ° C. Prepare a solution in deionized water, add the above-mentioned catalyst carrier under strong stirring, continue stirring for 12 hours, then dry it, and finally bake it at 600°C for 6 hours.

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Abstract

The invention discloses a catalyst for low-temperature synergistic degradation of dioxin and NOx and a preparation method for the catalyst and belongs to the technical field of treatment of garbage incineration exhaust gases. According to the catalyst, titanium dioxide nanoparticles and titanium nanotubes serve as a carrier, and cerium oxide, vanadium pentoxide and Pt serve as main active ingredients. The catalyst disclosed by the invention is aimed at the garbage incineration exhaust gases, which have the temperature of 140 DEG C to 300 DEG C, have the SO2 content higher than 500mg / Nm<3> and contain dust, the dioxin purification efficiency can reach 95% or more, the NOx purification efficiency can reach 80% or more, the emission of the dioxin can be lower than 0.1ng I-TEQ / Nm<3>, and the emission of the NOx can be lower than 150mg / Nm<3>.

Description

technical field [0001] The invention belongs to the technical field of waste incineration tail gas treatment and relates to a catalyst for low-temperature collaborative purification of dioxin and NOx in waste incineration tail gas. Background technique [0002] With the rapid development of social economy, the output of domestic waste in my country's urban and rural areas has increased rapidly. Domestic waste treatment methods mainly include landfill, composting, and incineration. Incineration treatment has many advantages, such as small footprint, high capacity and weight reduction rate, fast processing speed, thorough harmlessness, wide application range, and heat power generation. It is widely used at home and abroad, and its proportion is getting higher and higher. . During the incineration process of domestic waste, it is inevitable to produce NOx, SO 2 , Dioxins, heavy metals, HCl, particulate matter and other pollutants. In order to control waste incineration tail...

Claims

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Application Information

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IPC IPC(8): B01J23/648B01D53/86B01D53/56B01D53/72
CPCB01J23/002B01D53/8628B01D53/8668B01D2258/0291B01J23/6482B01J2523/00B01J2523/55B01J2523/3712
Inventor 王岳军陈雄波吴忠标莫建松梁平高珊
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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