A general and inherent strategy to improve the water tolerance of low temperature NH3-SCR catalysts via trace SiO2 deposition

Yu, Shengwen; Jiang, Ningxin; Zou, Weixin; Li, Lulu; Tang, Changjin; Dong, Lin

doi:10.1016/j.catcom.2016.06.001

Cited by 38 publications

(18 citation statements)

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“…Therefore, the combination of MnO x and carbon materials could produce an ideal low temperature SCR catalyst. Moreover, many carbon-based low temperature SCR catalysts have been developed over the past 10 years that offer high low temperature SCR performance, but also have good anti-poisoning properties due to the hydrophobicity and special pore structure of carbon materials (Bai et al, 2010;Xiao et al, 2016;Yu et al, 2016;Dong et al, 2017). However, the high cost of these carbon materials continues to be the main impediment to their widespread use in NOx removal processes (Zhu et al, 1999;Huang and Teng, 2003).…”

Section: Introductionmentioning

confidence: 99%

Agricultural Waste Derived Catalysts for Low Temperature SCR Process: Optimization of Preparation Process, Catalytic Activity and Characterization

Wang

et al. 2020

Aerosol Air Qual. Res.

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Carbon-based catalytic materials have received significant attention for low temperature flue gas denitrification (DeNO x ) process, due to their physicochemical properties and ease of modification. To improve the DeNO x efficiency, preparation of biochar catalyst supports was conducted that included the acid treatment of the agricultural wastes rice straw, corn cobs and lotus leaves. Taguchi experimental design (3 4 ) was employed to screen suitable carbon materials and optimize the preparation parameters of the biochar. All of the acid-modified and unmodified samples were evaluated to determine their performance and they were characterized by using SEM, BET and FT-IR analysis. The experimental and characterization results showed that acid modification of the biochars improved their DeNO x performance, which may have been due to the changes in the physical and chemical properties of the carbon material following the acid treatment. The optimum combination in the acid modification procedure was found to be the use of lotus leaf carbon treated with an acid/mass ratio of 1.50 and a pyrolysis temperature of 800°C. The biochar prepared using these optimum preparation parameters were then employed as a carrier to support an active catalyst component (MnO x ). The lotus leaf biochar supported 10 wt% manganese catalyst prepared using ultrasonic impregnation method exhibited nearly 90% NO x conversion at 250°C at a high space velocity of 45, 000 -1 , and it exhibited strong resistance to H 2 O. Additional studies showed that higher redox capacity and suitable surface acidity were two of the deciding factors in the improved low temperature SCR performance of the 10% Mn/LBC catalysts.

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Section: Introductionmentioning

confidence: 99%

Agricultural Waste Derived Catalysts for Low Temperature SCR Process: Optimization of Preparation Process, Catalytic Activity and Characterization

Wang

et al. 2020

Aerosol Air Qual. Res.

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“…Zhang et al 96 draw the same conclusion. Yu et al 124 adopted a solvothermal method to prepare SiO 2 -modified catalysts and deduced that the performance in the presence of H 2 O was highly related to pore size. Fig.…”

Section: Improvements In H 2 O Tolerance Of Cerium-based Catalysts For Selective Catalytic Reduction With Nhmentioning

confidence: 99%

“…Fig. 13 (a) Schematic diagram of the influence of H 2 O on different temperatures and pore sizes (b) effect of H 2 O on the catalyst 124. …”

mentioning

confidence: 99%

Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia

Zhang

Zou

et al. 2022

New J. Chem.

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“…Serious concerns have been raised towards the reduction of air quality due to the pollutants emitted from internal combustion engines by increasing transportation and the expansion of industry around the world. Nitrogen oxides resulted from combustion of fossil fuels are one of the most important environmental pollutants that lead to acid rain, Photochemical smog, ozone depletion and the formation of the respiratory system diseases in people (Yu et al, 2016). With increasing the effects caused by the exposure to nitrogen oxides, approaches have been utilized to reduce the release of these pollutants.…”

Section: Introductionmentioning

confidence: 99%

Catalytic removal of NO2 by Nickel _ platinum catalyst supported on multi-wall carbon nanotubes

2020

Global NEST: The International Journal

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<p>In the present study, the NO2 removal efficiency at concentrations of 3000 to 5000ppm was evaluated by nickel and platinum bimetallic catalyst supported on multiwalled carbon nanotubes (Ni-Pt/MWCNT) along with water vapor at different space velocity and temperatures. Morphological and structural characteristics, material formation phases and catalyst regeneration were investigated by FE-SEM, XRD and TPR tests, respectively. The results showed that increasing the weight percentage of platinum at Ni-Pt/MWCNT catalyst improved the removal efficiency at low temperature. The catalyst 25%W.Ni-3%W.Pt/MWCNT provided 92% removal efficiency at the temperature of 300℃, space velocity of 25000/hr and concentration of 3000 ppm, while,the 15%W.Ni-5%W.Pt/MWCNT represented highest removal efficiency (70%) at the temperature of 150℃. The removal efficiency of Ni-Pt/MWCNT catalyst is affected by the weight percentage of nickel and platinum, as well as the NO2 concentration at various temperatures. The results suggest that H_2 O can be used as a reducing agent to reduce 〖NO〗_2 by produced〖 H〗^+. The 25%W.Ni-3%W.Pt/MWCNT catalyst removal efficiency at the vicinity of water vapor and concentration of 3000 ppm 〖NO〗_2 , unchanged stability over the period of 100 minute.</p>

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A general and inherent strategy to improve the water tolerance of low temperature NH3-SCR catalysts via trace SiO2 deposition

Cited by 38 publications

References 20 publications

Agricultural Waste Derived Catalysts for Low Temperature SCR Process: Optimization of Preparation Process, Catalytic Activity and Characterization

Agricultural Waste Derived Catalysts for Low Temperature SCR Process: Optimization of Preparation Process, Catalytic Activity and Characterization

Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia

Catalytic removal of NO2 by Nickel _ platinum catalyst supported on multi-wall carbon nanotubes

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A general and inherent strategy to improve the water tolerance of low temperature NH3-SCR catalysts via trace SiO2 deposition

Cited by 38 publications

References 20 publications

Agricultural Waste Derived Catalysts for Low Temperature SCR Process: Optimization of Preparation Process, Catalytic Activity and Characterization

Agricultural Waste Derived Catalysts for Low Temperature SCR Process: Optimization of Preparation Process, Catalytic Activity and Characterization

Recent advances and perspectives in the resistance of SO2 and H2O of cerium-based catalysts for NOx selective catalytic reduction with ammonia

Catalytic removal of NO2 by Nickel _ platinum catalyst supported on multi-wall carbon nanotubes

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Recent advances and perspectives in the resistance of SO₂ and H₂O of cerium-based catalysts for NO_x selective catalytic reduction with ammonia