Dynamic chemical state conversion of nickel species supported on silica under CO–NO reaction conditions

Yamashita, Shohei; Yamamoto, Yoshihisa; Kawabata, Hisataka; Niwa, Yasumasa; Katayama, Misaki; Inada, Yuji

doi:10.1016/j.cattod.2017.07.028

Cited by 3 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, N 2 selectivity was calculated and is shown in Figure b. The formation of N 2 O from the side reaction (CO + 2NO → N 2 O + CO 2 ) has been identified for the CO–NO reaction in the absence of O 2 . At 250–300 °C, it was noted that higher N 2 selectivity was achieved over CoCeO x -TA and CoCeO x -SS catalysts than over the CoCeO x -SA catalyst.…”

Section: Resultsmentioning

confidence: 96%

“…The formation of N 2 O from the side reaction (CO + 2NO → N 2 O + CO 2 ) has been identified for the CO−NO reaction in the absence of O 2 . 22 At 250−300 °C, it was noted that higher N 2 selectivity was achieved over CoCeO x -TA and CoCeO x -SS catalysts than over the CoCeO x -SA catalyst. Because limited NO x conversion was observed over CoCeO x -SA and CoCeO x -OA catalysts, N 2 selectivity was not calculated at 150−200 and 350−400 °C.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Promotional Effect of Preparation Methods on Catalytic Reduction of NO by CO over CoCeO_x Catalysts

Zeng

Zhong

et al. 2019

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

In this study, a series of CoCeO x catalysts were prepared by template, solid-state grinding with cobalt sulfate or cobalt acetate as the precursor and the oil bath method for catalytic reduction of NO x by CO (CO–NO). These catalysts were characterized by X-ray diffraction, Brunauer–Emmett–Teller, Raman spectroscopy, X-ray photoelectron spectroscopy, temperature-programmed reduction of H2, and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The results indicated that CoCeO x -TA and CoCeO x -SS catalysts exhibited much higher activity, which were attributed to excellent reducibility property, abundant chemical adsorbed oxygen, and NO absorption sites. In the presence of O2, the activity decreased obviously over CoCeO x -TA, CoCeO x -SS, and CoCeO x -SA catalysts. However, the activity increased at high temperatures over the CoCeO x -OA catalyst. According to the result of in situ DRIFTS, nitrate species decreased over CoCeO x -TA, CoCeO x -SS, and CoCeO x -SA catalysts in the presence of O2, which might inhibit the reduction efficiency of NO. Moreover, NO adsorption was not affected by O2 over CoCeO x -OA catalyst, which could contribute to its high activity in the CO-selective catalytic reduction reaction.

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Promotional Effect of Preparation Methods on Catalytic Reduction of NO by CO over CoCeO_x Catalysts

Zeng

Zhong

et al. 2019

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Liu et al [190] prepared Cu 0.1 La 0.1 Ce 0.8 O catalyst, which had good water resistance and catalytic stability in CO-SCR process. Yamashita et al [199] studied the CO-SCR reaction of nickel species supported on silica. Yao et al [200] discussed the mechanism of CeO 2 modified MnO x catalyst at low temperature (Figure 12a).…”

Section: Co-scrmentioning

confidence: 99%

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Liu

et al. 2019

Catalysts

View full text Add to dashboard Cite

Nitrogen oxides (NO x ) represent one of the main sources of haze and pollution of the atmosphere as well as the causes of photochemical smog and acid rain. Furthermore, it poses a serious threat to human health. With the increasing emission of NO x , it is urgent to control NO x . According to the different mechanisms of NO x removal methods, this paper elaborated on the adsorption method represented by activated carbon adsorption, analyzed the oxidation method represented by Fenton oxidation, discussed the reduction method represented by selective catalytic reduction, and summarized the plasma method represented by plasma-modified catalyst to remove NO x . At the same time, the current research status and existing problems of different NO x removal technologies were revealed and the future development prospects were forecasted.Catalysts 2019, 9, 771 2 of 39 adsorption, oxidation, reduction, and plasma methods. In view of these attentive findings, adsorption method uses recyclable solid adsorbent material to adsorb NO x from flue gas through microporous structure, remarkably, environmentally friendly, no secondary pollution, and energy-saving and -efficient features make it stand out [18][19][20]. The oxidation process is a method that oxidizes NO into NO 2 or N 2 O 3 with high solubility under the action of an oxidant that is then absorbed by water or alkali solution. The process is simple and cost-saving, and is widely used in the wet flue gas denitrification process with relatively low cost and high removal efficiency of NO x ; except that the oxidized NO and SO 2 can be removed simultaneously to produce high value-added products [21][22][23]. The reduction method has the characteristics of high efficiency, cleanliness, and mildness; NO x removal can be realized at low temperature at present [24][25][26]. The plasma method is used to modify the surface of the catalyst, the dispersion of active species can be improved by plasma treatment, and the stability and low temperature activity of catalyst can be improved [27,28].Seldom, if ever, does a comprehensive article to introduce the current situation and treatment methods of removing NO x . In this paper, we tried to renovate, classify, and summarize the significant perspectives and most relevant findings reported in recent research articles and earlier reviews generalizing the mechanism analysis and research progress of NO x removal by adsorption, oxidation, reduction, and plasma methods, which can provide means for promoting the technological progress of pollution prevention, maintaining healthy development of factories continuously, studying the methods of removing NO x deeply, and mastering different technologies of removing NO x , as well as providing guidance for controlling the emission of NO x from motor vehicles such as diesel, gasoline, and so on. In order to improve the environmental quality and save the ecological environment, this paper further provides a convenient, low-cost, efficient, and economic guidance line.

show abstract

Promotion effect of Ni doping on the oxygen resistance property of Fe/CeO2 catalyst for CO-SCR reaction: Activity test and mechanism investigation

Chen

Wang

et al. 2022

Journal of Hazardous Materials

View full text Add to dashboard Cite

Dynamic chemical state conversion of nickel species supported on silica under CO–NO reaction conditions

Cited by 3 publications

References 31 publications

Promotional Effect of Preparation Methods on Catalytic Reduction of NO by CO over CoCeO_x Catalysts

Promotional Effect of Preparation Methods on Catalytic Reduction of NO by CO over CoCeO_x Catalysts

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Promotion effect of Ni doping on the oxygen resistance property of Fe/CeO2 catalyst for CO-SCR reaction: Activity test and mechanism investigation

Contact Info

Product

Resources

About

Dynamic chemical state conversion of nickel species supported on silica under CO–NO reaction conditions

Cited by 3 publications

References 31 publications

Promotional Effect of Preparation Methods on Catalytic Reduction of NO by CO over CoCeOx Catalysts

Promotional Effect of Preparation Methods on Catalytic Reduction of NO by CO over CoCeOx Catalysts

A Critical Review of Recent Progress and Perspective in Practical Denitration Application

Promotion effect of Ni doping on the oxygen resistance property of Fe/CeO2 catalyst for CO-SCR reaction: Activity test and mechanism investigation

Contact Info

Product

Resources

About

Promotional Effect of Preparation Methods on Catalytic Reduction of NO by CO over CoCeO_x Catalysts

Promotional Effect of Preparation Methods on Catalytic Reduction of NO by CO over CoCeO_x Catalysts