NO
 x
 storage and reduction assisted by non-thermal plasma over Co/Pt/Ba/γ-Al2O3 catalyst using CH4 as reductant

Zhu, Tao; Zhang, Xing; Yi, Nengjing; Liu, Haibing; Li, Zhenguo

doi:10.1088/2058-6272/abd620

Cited by 5 publications

(3 citation statements)

References 41 publications

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“…The byproducts of N 2 O and N 2 O 5 are not detected in the outlet gas, which indicates that the NH 3 -SCR assisted by NTP does not cause secondary pollution. The following chemical reactions occur in the NTP-SCR system according to the relevant reports [28][29][30]…”

Section: Effect Of Specific Energy Input On No X Conversionmentioning

confidence: 99%

Selective catalytic reduction of NO_x with NH₃ assisted by non-thermal plasma over CeMnZrO_x@TiO₂ core–shell catalyst

Zhu¹,

Zhang²,

Li³

et al. 2022

Plasma Sci. Technol.

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The presented work reports the selective catalytic reduction (SCR) of NO x assisted by dielectric barrier discharge plasma via simulating marine diesel engine exhaust, and the experimental results demonstrate that the low-temperature activity of NH3-SCR assisted by non-thermal plasma is enhanced significantly, particularly in the presence of a C3H6 additive. Simultaneously, CeMnZrO x @TiO2 exhibits strong tolerance to SO2 poisoning and superior catalytic stability. It is worthwhile to explore a new approach to remove NO x from marine diesel engine exhaust, which is of vital significance for both academic research and practical applications.

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Section: Effect Of Specific Energy Input On No X Conversionmentioning

confidence: 99%

Selective catalytic reduction of NO_x with NH₃ assisted by non-thermal plasma over CeMnZrO_x@TiO₂ core–shell catalyst

Zhu¹,

Zhang²,

Li³

et al. 2022

Plasma Sci. Technol.

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“…Their results showed that the highest NO x reduction efficiency was obtained when CH 4 was added to the reactants. Zhu et al [32], studied the effect of NTP in combination with a Co/PBA catalyst on the NO x removal efficiency under the conditions of NO/CH 4 /O 2 /H 2 O/SO 2 /Ar, and showed that O 2 , H 2 O, and SO 2 had significant effects on NO x reduction.…”

Section: Introductionmentioning

confidence: 99%

Nonthermal plasma removal of CH₄-NO_x under LNG engine exhaust environment: experiment, mechanism and kinetic analysis

Xiang,

Lyu,

Cai

et al. 2024

Phys. Scr.

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To explore the mechanism underlying the removal of CH4 and NOx, which are typical emissions from LNG engines, through the nonthermal plasma method, aplasma chemistry model of CH4-NOx under the LNG engine exhaust environmentwas established in this study. Sixty key reactions affecting the conversion of CH4, CO, and NOx were determined through sensitivity analysis, and their pre-exponential factors were optimized using a genetic algorithm. The proposed model shows good performance in predicting the concentrations of CH4, CO, and NOx under the exhaust conditions of LNG engine. Then, reaction path analyses for evolution of CH4, CO, NO, and NO2 were performed under specific conditions.The results showed that CH4 mainly decomposed into CH2 that is subsequently converted into CO and CO2. CH2 is the main source for CO production. The concentration of NOx is determined by the oxidation reactions of N with O2, OH, and HO2. The specific concentration distributions of NO and NO2 were influenced by the oxidation-reduction reactions between them. Analyses of the time scales for the conversion processes of CH4, CO, and NOx were also conducted, and it was found that the reaction time scales of CH4 and CO were approximately 1×10-10-1×10-5 s, and that was approximately 1×10-9-1×10-4 s for NOx. Furthermore, during the overlapping period for the conversion of CH4, CO, and NOx, the NOx was dominant in the competition for O. This study provides a basis for the construction of a plasma catalytic chemistry model of CH4-NOx under LNG engine exhaust conditions.

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“…Dielectric barrier discharge (DBD) has been demonstrated as the superior mode for the generation of NTP [19,20]. Nevertheless, NO removal by plasma was mainly attributed to oxidation [21][22][23][24][25], hence ammonia [26,27] and hydrocarbon gas as CH 4 [28,29], C 3 H 6 [30], C 3 H 8 [31], C 7 H 16 [32] and C 8 H 18 [33] are used as reducing gases in many previous studies. However, there is the limitations of gas leakage are yet to be overcome.…”

Section: Introductionmentioning

confidence: 99%

Removal of NO by carbon-based catalytic reduction bed loaded with Mn induced by dielectric barrier discharge at low temperature

Gao

Jin

Wang

et al. 2022

Environmental Engineering Research

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The current paper reports on a newly developed DBD-Mn/FCRB hybrid system to explore the removal of NO x by reduction without adding reducing gas at low temperature (below 80℃). This technology was established with a fixed carbon-based reduction catalytic reduction bed loaded with manganese (Mn/FCRB) induced by dielectric barrier discharge (DBD). The NO conversion and N 2 selectivity in the new hybrid system reached 90.9% and 79.9% respectively under 8% oxygen content, 1,200 J/L specific input energy (SIE), which were all higher than in the single DBD and DBD-FCRB systems, respectively. The Mn/FCRB was further characterized before and after activation by SEM, XRD and XPS. The possible reaction pathways of denitration were proposed through three processes based on the experimental results: direct denitration of active carbon atoms excited by plasma, reduction by adsorptive C(N) and C(O) complexes on the FCRB surface, and the reaction of nitrogen oxides with by-product CO. In addition, the results also showed that the new in-situ reduction denitration system had strong oxygen shock resistance and water resistance.

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NO_x storage and reduction assisted by non-thermal plasma over Co/Pt/Ba/γ-Al₂O₃ catalyst using CH₄ as reductant

Cited by 5 publications

References 41 publications

Selective catalytic reduction of NO_x with NH₃ assisted by non-thermal plasma over CeMnZrO_x@TiO₂ core–shell catalyst

Selective catalytic reduction of NO_x with NH₃ assisted by non-thermal plasma over CeMnZrO_x@TiO₂ core–shell catalyst

Nonthermal plasma removal of CH₄-NO_x under LNG engine exhaust environment: experiment, mechanism and kinetic analysis

Removal of NO by carbon-based catalytic reduction bed loaded with Mn induced by dielectric barrier discharge at low temperature

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NO x storage and reduction assisted by non-thermal plasma over Co/Pt/Ba/γ-Al2O3 catalyst using CH4 as reductant

Cited by 5 publications

References 41 publications

Selective catalytic reduction of NO x with NH3 assisted by non-thermal plasma over CeMnZrO x @TiO2 core–shell catalyst

Selective catalytic reduction of NO x with NH3 assisted by non-thermal plasma over CeMnZrO x @TiO2 core–shell catalyst

Nonthermal plasma removal of CH4-NOx under LNG engine exhaust environment: experiment, mechanism and kinetic analysis

Removal of NO by carbon-based catalytic reduction bed loaded with Mn induced by dielectric barrier discharge at low temperature

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NO_x storage and reduction assisted by non-thermal plasma over Co/Pt/Ba/γ-Al₂O₃ catalyst using CH₄ as reductant

Selective catalytic reduction of NO_x with NH₃ assisted by non-thermal plasma over CeMnZrO_x@TiO₂ core–shell catalyst

Selective catalytic reduction of NO_x with NH₃ assisted by non-thermal plasma over CeMnZrO_x@TiO₂ core–shell catalyst

Nonthermal plasma removal of CH₄-NO_x under LNG engine exhaust environment: experiment, mechanism and kinetic analysis