Citation: Rao XIAO, Jun-feng ZHANG, Ling-kui ZHAO. An ammonia-free denitration method: Direct reduction of NO_x over activated carbon promoted by Cu-K bimetals[J]. Journal of Fuel Chemistry and Technology, ;2022, 50(5): 628-640. doi: 10.1016/S1872-5813(21)60183-4 shu

An ammonia-free denitration method: Direct reduction of NO_x over activated carbon promoted by Cu-K bimetals

Rao XIAO ^{1, 2,} ,
Jun-feng ZHANG ^{1, 2,,} ,
Ling-kui ZHAO ^{1, 2}

1.
Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
2.
Hunan Provincial Environmental Protection of Engineering Technology Center of Air Complex Pollution control (XTU), Xiangtan 411105, China

Corresponding author: Jun-feng ZHANG, xtuzhjf@163.com
Received Date: 10 September 2021
Revised Date: 22 November 2021
Available Online: 9 June 2022

Figures(17)

As ammonia slip becomes more serious with the traditional deNO_x application, ammonia-free technologies have received more and more attention recently. Cu-K bimetal loaded activated carbon catalysts were prepared by equivalent-volume impregnation method for the direct reduction of NO and showed good NO reduction performance in a wide temperature range under temperature-programmed surface reactions (TPSRs) conditions in aerobic and anaerobic environments. The catalysts were characterized by BET, SEM, XRD, XPS, H₂-TPR, Raman and FT-IR techniques and the NO reduction mechanism was analyzed. Experimental results show that the active functional groups formed on the surface of activated carbon are the important intermediate products and play a key role in the reduction reaction. The presence of O₂ greatly promotes the formation of the intermediate, C(O) (Oxygen-containing functional groups on the carbon surface), leading to the increase reduction rate of NO. The bimetallic oxides catalysts are obviously effective to directly reduce NO. When the ratio of copper: potassium is 2∶1, the NO reduction efficiency is about 90% at 300 °C. The catalytic activity mainly depends on the redox cycle of CuO/Cu₂O, and the potassium inhibits the agglomeration of copper on the surface of carbon materials and enhances the catalytic reactivity of Cu.
- activated carbon,
- ammonia-free denitration,
- bimetal catalysis,
- Cu,
- K
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

An ammonia-free denitration method: Direct reduction of NOx over activated carbon promoted by Cu-K bimetals

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通讯作者: 陈斌, bchen63@163.com

An ammonia-free denitration method: Direct reduction of NO_x over activated carbon promoted by Cu-K bimetals