NO presence effects on the reduction of N2O by CO over Al–Pd–Co oxide catalyst

Chang, Kil Sang; Peng, Xiaoshan

doi:10.1016/j.jiec.2010.01.046

Cited by 18 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…found that CO combustion released a large number of oxygen free radicals, thus promoting the decomposition of N 2 O to produce more NO. It was found that the introduction of CO enhances the catalytic activity of mixed metal oxides to promote the reduction of N 2 O 18 . It was reported that the presence of Fe 2 O 3 and high levels of CO significantly promoted the reduction of N 2 O and decreased the activation energy 19 .…”

Section: Introductionmentioning

confidence: 99%

Theoretical insights into the effect of CO on the heterogeneous reduction of N₂O on char

Yin

Tao

Deng

et al. 2023

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND: The role of CO and adsorption sequence of CO and N 2 O in the adsorption and reduction of N 2 O on char was investigated based on density functional theory at the M06-2X/6-311G(d) theoretical level. This study lays a foundation for reaction mechanisms of the influence of CO on heterogeneous N 2 O reduction on char. RESULTS: Zigzag and armchair models were used as char models. The first adsorption of CO increases the limiting-step energy barrier of the reaction by 44.5 kJÁmol −1 compared with the first adsorption of N 2 O for zigzag char. However, the adsorption sequence does not have an effect for armchair char. The rate-limiting steps of the overall reaction for zigzag and armchair char models occur in the stages of N 2 O adsorption and N 2 O reduction, respectively. The introduction of CO has little effect on the N 2 O adsorption stage but increases the energy barrier of the N 2 O reduction stage. During the reduction of N 2 O on coal char, zigzag char releases greater heat than armchair char; moreover, zigzag char has a much lower activation energy than armchair char. CONCLUSION: In the simultaneous presence of CO and N 2 O, the char model prefers to adsorb N 2 O. The rate-limiting step of the two char models are located in different reaction stages, and CO mainly affects the N 2 O reduction stage. The presence of CO hinders the reduction of N 2 O on the surface of both zigzag and armchair char models. A rise of temperature can promote the reduction of N 2 O by char. Zigzag char is superior to armchair char in both thermodynamics and kinetics.

show abstract

Section: Introductionmentioning

confidence: 99%

Theoretical insights into the effect of CO on the heterogeneous reduction of N₂O on char

Yin

Tao

Deng

et al. 2023

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…In addition, N 2 O has a global warming index that is 310 times higher than that of CO 2 and is a substance that destroys the earth’s ozone layer. Further, N 2 O is known to be mostly generated from fixed-emission sources such as industrial boilers, large power plants, and waste incinerators. − Oxy-combustion technology is employed for capturing, using, and storing CO 2 . It uses O 2 separated by an air separation unit and CO 2 from the combustion exhaust gas.…”

Section: Introductionmentioning

confidence: 99%

A Study on the N₂O Reduction Rate According to Temperature and Residence Time in the Exhaust Gas Atmosphere Emitted on Combustion of Air and Oxygen

et al. 2022

View full text Add to dashboard Cite

N 2 O is a hazardous greenhouse gas. It should be reduced to solve global warming problems. In this study, experiments of N 2 O thermal decomposition were conducted by simulating the exhaust gas atmosphere emitted during the combustion of air and pure oxygen in an actual circulating fluidized bed system and incinerator system. As a result of comparing the N 2 O reduction rate in N 2 and CO 2 atmospheres, the N 2 O reduction rate in the CO 2 atmosphere was 20% higher than that in the N 2 atmosphere. It is judged that the N 2 O reduction rate is high in a CO 2 atmosphere (exhaust gas from pure oxygen combustion) due to complex factors such as the reverse reaction, the diffusion coefficient, and static pressure-specific heat. Therefore, pure oxygen combustion increases the reduction rate of nitrous oxide. In addition, when operated with an appropriate residence time and temperature, a reduction effect of more than 95% can be expected, and the fuel consumption rate is also expected to improve.

show abstract

“…The major advantages of NTP technology include the moderate operation conditions (normal temperature and atmospheric pressure), moderate capital cost, compact system, easy operations and short residence times compared to the conventional technologies [8][9][10]. In the field of air pollution control, the NTP technology has been tested for the abatement of various types of hazardous air pollutants such as volatile organic compounds (VOCs) [11][12][13][14][15], SO 2 [16], NO x [17][18][19], CFCs [20][21][22][23][24], odors [25], and mercury [26].…”

Section: Introductionmentioning

confidence: 99%

Volatile organic compounds emission control in industrial pollution source using plasma technology coupled with F-TiO₂/γ-Al₂O₃

Zhu

Chen

Xia

et al. 2015

Environmental Technology

View full text Add to dashboard Cite

Volatile organic compounds' (VOCs) effluents, which come from many industries, are triggering serious environmental problems. As an emerging technology, non-thermal plasma (NTP) technology is a potential technology for VOCs emission control. NTP coupled with F-TiO2/γ-Al2O3 is used for toluene removal from a gaseous influent at normal temperature and atmospheric pressure. NTP is generated by dielectric barrier discharge, and F-TiO2/γ-Al2O3 can be prepared by sol-gel method in the laboratory. In the experiment, the different packed materials were packed into the plasma reactor, including γ-Al2O3, TiO2/γ-Al2O3 and F-TiO2/γ-Al2O3. Through a series of characterization methods such as X-ray diffraction, scanning electronic microscopy and Brunner-Emmet-Teller measurements, the results show that the particle size distribution of F-TiO2 is relatively smaller than that of TiO2, and the pore distribution of F-TiO2 is more uniformly distributed than that of TiO2. The relationships among toluene removal efficiency, reactor input energy density, and the equivalent capacitances of air gap and dielectric barrier layer were investigated. The results show that the synergistic technology NTP with F-TiO2/γ-Al2O3 resulted in greater enhancement of toluene removal efficiency and energy efficiency. Especially, when packing with F-TiO2/γ-Al2O3 in NTP reactor, toluene removal efficiency reaches 99% and higher. Based on the data analysis of Fourier Transform Infrared Spectroscopy, the experimental results showed that NTP reactor packed with F-TiO2/γ-Al2O3 resulted in a better inhibition for by-products formation effectively in the gas exhaust.

show abstract

NO presence effects on the reduction of N2O by CO over Al–Pd–Co oxide catalyst

Cited by 18 publications

References 24 publications

Theoretical insights into the effect of CO on the heterogeneous reduction of N₂O on char

Theoretical insights into the effect of CO on the heterogeneous reduction of N₂O on char

A Study on the N₂O Reduction Rate According to Temperature and Residence Time in the Exhaust Gas Atmosphere Emitted on Combustion of Air and Oxygen

Volatile organic compounds emission control in industrial pollution source using plasma technology coupled with F-TiO₂/γ-Al₂O₃

Contact Info

Product

Resources

About

NO presence effects on the reduction of N2O by CO over Al–Pd–Co oxide catalyst

Cited by 18 publications

References 24 publications

Theoretical insights into the effect of CO on the heterogeneous reduction of N2O on char

Theoretical insights into the effect of CO on the heterogeneous reduction of N2O on char

A Study on the N2O Reduction Rate According to Temperature and Residence Time in the Exhaust Gas Atmosphere Emitted on Combustion of Air and Oxygen

Volatile organic compounds emission control in industrial pollution source using plasma technology coupled with F-TiO2/γ-Al2O3

Contact Info

Product

Resources

About

Theoretical insights into the effect of CO on the heterogeneous reduction of N₂O on char

Theoretical insights into the effect of CO on the heterogeneous reduction of N₂O on char

A Study on the N₂O Reduction Rate According to Temperature and Residence Time in the Exhaust Gas Atmosphere Emitted on Combustion of Air and Oxygen

Volatile organic compounds emission control in industrial pollution source using plasma technology coupled with F-TiO₂/γ-Al₂O₃