A comparative study of the poisoning effect of Zn and Pb on Ce/TiO2 catalyst for low temperature selective catalytic reduction of NO with NH3

Guo, Rui‐tang; Lu, Chen-zi; Pan, Weiguo; Zhen, Wenlong; Wang, Qingshan; Chen, Qilin; Ding, Honglei; Yang, Ning-zhi

doi:10.1016/j.catcom.2014.10.006

Cited by 85 publications

(31 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be seen from Table 1, the doping of Zn or Pb would lead to a sharp decrease of surface area and total pore volume, which may be resulted from the black of microspores and the agglomeration of catalyst during the loading process of Zn or Pb on Mn/TiO 2 catalyst [5].…”

Section: Bet and Xrd Measurementsmentioning

confidence: 98%

“…The decrease of surface acidity is regarded as one of the main reason for the deactivation of SCR catalysts doped by heavy metals [5,12]. To study the surface acidity of the catalyst samples, NH 3 -TPD analysis was performed and the results are presented in Fig.…”

Section: Nh 3 -Tpd Analysismentioning

confidence: 99%

“…As the typical heavy metals in power plant flue gas, the poisoning effect of Pb and Zn on the performance of low-temperature SCR catalyst still needs further study. In our previous study, the poisoning effect of Zn and Pb on Ce/TiO 2 catalyst has been investigated [5]. But the different poisoning effect of Zn and Pb has not been explained theoretically.…”

Section: Introductionmentioning

confidence: 98%

“…Several transitional metals, such as Mn, Ce, Cu, Fe, have been proven to be active for SCR of NO with NH 3 [4][5][6][7][8][9][10]. It is well known that heavy metals contained in the flue gas from coal-fired power plants could cause the deactivation of vanadium-based SCR catalysts [11][12].…”

Section: Introductionmentioning

confidence: 99%

“…However, there are some drawbacks associated with the commercial catalyst (V 2 O 5 -WO 3 (MoO 3 )/TiO 2 ), for example, the deactivation by SO 2 and dust present in the flue gas, the formation of N 2 O at high temperature and the toxicity of vanadia, which raising the requirement for developing new environmental-friendly SCR catalyst with high activity and selectivity for NOx removal [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The poisoning effect of heavy metals doping on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

Guo

Wang

Pan

et al. 2015

Journal of Molecular Catalysis A: Chemical

Self Cite

View full text Add to dashboard Cite

Section: Bet and Xrd Measurementsmentioning

confidence: 98%

Section: Nh 3 -Tpd Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The poisoning effect of heavy metals doping on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

Guo

Wang

Pan

et al. 2015

Journal of Molecular Catalysis A: Chemical

Self Cite

View full text Add to dashboard Cite

Poisoning effects of lead species on the V₂O₅‐WO₃/TiO₂ type NH₃‐selective catalytic reduction catalyst

Ali

Lü

Iqbal

et al. 2019

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Heavy metal Pb is an inevitable ingredient of coal‐fired flue gas and has been proven to be a source of inhibiting effect on the selective catalytic reduction (SCR) catalyst. In this paper, two types of Pb‐poisoned catalyst, prepared by the incipient wetness impregnation and solid diffusion methods, are studied to unveil the poisoning effects of lead species on the V2O5‐WO3/TiO2 catalyst. The activity test results showed that lead species loaded by the incipient wetness impregnation method exhibited a significant inhibiting effect on the denitrification efficiency of the catalyst although a negligible activity loss was observed on the samples from the solid diffusion method. Characterizations of fresh and Pb‐poisoned catalysts from incipient wetness impregnation method were applied using comprehensive techniques such as X‐Ray diffraction (XRD), field emission scanning electron microscopy (FE‐SEM), X‐ray fluorescence (XRF), NH3‐temperature programmed desorption (NH3‐TPD), X‐Ray photoelectron spectroscopy (XPS), and so forth. The analytical results indicated that a phase transformation occurred in tungsten species and the amorphous WO3 converted into PbWO4, causing the accumulation and valence imbalance of active vanadium phase, which further decreased the surface acidity and activity of the V2O5‐WO3/TiO2 catalyst.

show abstract

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH₃ at low temperatures

Cheng

et al. 2020

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

The yCe/Al-Mn-pillared interlayered clay (PILC, y [Ce content] = 8-9 wt%) catalysts were prepared using the impregnation method. Catalytic activities of the materials for the selective catalytic reduction (SCR) of NO with NH 3 at low temperatures were evaluated, and physicochemical properties of the samples were characterized by X-ray diffraction, N 2 adsorption-desorption, temperature-programmed reduction, ammonia temperature-programmed desorption, X-ray photoelectron spectroscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopy techniques. It is found that introduction of cerium enhanced NO conversions at low temperatures, and the 8Ce/Al-Mn-pillared sample showed the highest NO conversion (92% at 300 C). The superior catalytic activity of 8Ce/Al-Mn-PILC was associated with the change in active component and increases in amounts of the surface chemisorbed oxygen species and the acid sites after ceria loading. Additionally, the SCR reaction mechanism over 8Ce/Al-Mn-PILC followed both Langmuir-Hinshelwood and Eley-Rideal mechanisms, with the former being dominant. K E Y W O R D SAl-Mn copillared clay, ceria loading, selective catalytic reduction, in situ DRIFTS | Al-Mn-PILC-supported ceria catalystsThe yCe/Al-Mn-PILC (y = 8 and 9 wt%) samples were prepared by impregnating the Al-Mn-PILC support with Ce (NO 3 ) 3 Á6H 2 O. Then, the sample was dried at 120 C for 6 hr and calcined at 400 C for 2 hr in an air atmosphere. | Al-PILC-supported Mn and claysupported Ce-Mn catalystsThe Mn/Al-PILC (Mn [i.e., Mn/{Mn + Al-PILC}] was 10 wt%, which was the same content of Mn in Al-Mn-2 of 14 CHENG ET AL.

show abstract

A comparative study of the poisoning effect of Zn and Pb on Ce/TiO2 catalyst for low temperature selective catalytic reduction of NO with NH3

Cited by 85 publications

References 26 publications

The poisoning effect of heavy metals doping on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

The poisoning effect of heavy metals doping on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

Poisoning effects of lead species on the V₂O₅‐WO₃/TiO₂ type NH₃‐selective catalytic reduction catalyst

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH₃ at low temperatures

Contact Info

Product

Resources

About

A comparative study of the poisoning effect of Zn and Pb on Ce/TiO2 catalyst for low temperature selective catalytic reduction of NO with NH3

Cited by 85 publications

References 26 publications

The poisoning effect of heavy metals doping on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

The poisoning effect of heavy metals doping on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3

Poisoning effects of lead species on the V2O5‐WO3/TiO2 type NH3‐selective catalytic reduction catalyst

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH3 at low temperatures

Contact Info

Product

Resources

About

Poisoning effects of lead species on the V₂O₅‐WO₃/TiO₂ type NH₃‐selective catalytic reduction catalyst

Ceria‐modified Al‐Mn‐pillared clay catalysts for the selective catalytic reduction of NO with NH₃ at low temperatures