Search

Your search keyword '"Mn–Ce–Ti–O composite aerogel"' showing total 3 results
Start Over Descriptor "Mn–Ce–Ti–O composite aerogel"
3 results on '"Mn–Ce–Ti–O composite aerogel"'

1. Preparation of Mesoporous Mn–Ce–Ti–O Aerogels by a One-Pot Sol–Gel Method for Selective Catalytic Reduction of NO with NH3

Author

Yan Liu, Yang Shuo, Li Weifeng, He Wang, Wang Jiangcan, Rui Zhang, Wei Yabin, Shuangling Jin, Minglin Jin, Licheng Ling, Minghe Yang, and Wenming Qiao

Subjects
02 engineering and technology, 010402 general chemistry, mesopore size, 01 natural sciences, lcsh:Technology, Catalysis, law.invention, chemistry.chemical_compound, law, apparent activation energy, General Materials Science, Calcination, Propylene oxide, Lewis acids and bases, mn–ce–ti–o composite aerogel, lcsh:Microscopy, Sol-gel, so2 resistance, lcsh:QC120-168.85, lcsh:QH201-278.5, lcsh:T, Selective catalytic reduction, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Chemical engineering, lcsh:TA1-2040, Ethyl acetoacetate, nh3–scr, lcsh:Descriptive and experimental mechanics, lcsh:Electrical engineering. Electronics. Nuclear engineering, 0210 nano-technology, Mesoporous material, lcsh:Engineering (General). Civil engineering (General), lcsh:TK1-9971
Abstract

Novel Mn&ndash, Ce&ndash, Ti&ndash, O composite aerogels with large mesopore size were prepared via a one-pot sol&ndash, gel method by using propylene oxide as a network gel inducer and ethyl acetoacetate as a complexing agent. The effect of calcination temperature (400, 500, 600, and 700 &deg, C) on the NH3&ndash, selective catalytic reduction (SCR) performance of the obtained Mn&ndash, O composite aerogels was investigated. The results show that the Mn&ndash, O catalyst calcined at 600 &deg, C exhibits the highest NH3&ndash, SCR activity and lowest apparent activation energy due to its most abundant Lewis acid sites and best reducibility. The NO conversion of the MCTO-600 catalyst maintains 100% at 200 &deg, C in the presence of 100 ppm SO2, showing the superior resistance to SO2 poisoning as compared with the MnOx&ndash, CeO2&ndash, TiO2 catalysts reported the literature. This should be mainly attributed to its large mesopore sizes with an average pore size of 32 nm and abundant Lewis acid sites. The former fact facilitates the decomposition of NH4HSO4, and the latter fact reduces vapor pressure of NH3. The NH3&ndash, SCR process on the MCTO-600 catalyst follows both the Eley&ndash, Rideal (E&ndash, R) mechanism and the Langmuir&ndash, Hinshelwood (L&ndash, H) mechanism.

Published
2020

2. Preparation of Mesoporous Mn-Ce-Ti-O Aerogels by a One-Pot Sol-Gel Method for Selective Catalytic Reduction of NO with NH

Author

Yabin, Wei, Shuangling, Jin, Rui, Zhang, Weifeng, Li, Jiangcan, Wang, Shuo, Yang, He, Wang, Minghe, Yang, Yan, Liu, Wenming, Qiao, Licheng, Ling, and Minglin, Jin

Subjects
Mn–Ce–Ti–O composite aerogel, SO2 resistance, NH3–SCR, apparent activation energy, mesopore size, Article
Abstract

Novel Mn–Ce–Ti–O composite aerogels with large mesopore size were prepared via a one-pot sol–gel method by using propylene oxide as a network gel inducer and ethyl acetoacetate as a complexing agent. The effect of calcination temperature (400, 500, 600, and 700 °C) on the NH3–selective catalytic reduction (SCR) performance of the obtained Mn–Ce–Ti–O composite aerogels was investigated. The results show that the Mn–Ce–Ti–O catalyst calcined at 600 °C exhibits the highest NH3–SCR activity and lowest apparent activation energy due to its most abundant Lewis acid sites and best reducibility. The NO conversion of the MCTO-600 catalyst maintains 100% at 200 °C in the presence of 100 ppm SO2, showing the superior resistance to SO2 poisoning as compared with the MnOx–CeO2–TiO2 catalysts reported the literature. This should be mainly attributed to its large mesopore sizes with an average pore size of 32 nm and abundant Lewis acid sites. The former fact facilitates the decomposition of NH4HSO4, and the latter fact reduces vapor pressure of NH3. The NH3–SCR process on the MCTO-600 catalyst follows both the Eley–Rideal (E–R) mechanism and the Langmuir–Hinshelwood (L–H) mechanism.

Published
2019

3. Preparation of Mesoporous Mn–Ce–Ti–O Aerogels by a One-Pot Sol–Gel Method for Selective Catalytic Reduction of NO with NH3.

Author

Wei, Yabin, Jin, Shuangling, Zhang, Rui, Li, Weifeng, Wang, Jiangcan, Yang, Shuo, Wang, He, Yang, Minghe, Liu, Yan, Qiao, Wenming, Ling, Licheng, and Jin, Minglin

Subjects
*CATALYTIC reduction, *SOL-gel processes, *AEROGELS, *PROPYLENE oxide, *ETHYL acetoacetate, *SELECTIVE catalytic oxidation, *ACTIVATION energy
Abstract

Novel Mn–Ce–Ti–O composite aerogels with large mesopore size were prepared via a one-pot sol–gel method by using propylene oxide as a network gel inducer and ethyl acetoacetate as a complexing agent. The effect of calcination temperature (400, 500, 600, and 700 °C) on the NH3–selective catalytic reduction (SCR) performance of the obtained Mn–Ce–Ti–O composite aerogels was investigated. The results show that the Mn–Ce–Ti–O catalyst calcined at 600 °C exhibits the highest NH3–SCR activity and lowest apparent activation energy due to its most abundant Lewis acid sites and best reducibility. The NO conversion of the MCTO-600 catalyst maintains 100% at 200 °C in the presence of 100 ppm SO2, showing the superior resistance to SO2 poisoning as compared with the MnOx–CeO2–TiO2 catalysts reported the literature. This should be mainly attributed to its large mesopore sizes with an average pore size of 32 nm and abundant Lewis acid sites. The former fact facilitates the decomposition of NH4HSO4, and the latter fact reduces vapor pressure of NH3. The NH3–SCR process on the MCTO-600 catalyst follows both the Eley–Rideal (E–R) mechanism and the Langmuir–Hinshelwood (L–H) mechanism. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results