Catalytic decomposition of nitrous oxide over perovskite type solid oxide solutions and supported noble metal catalysts

Gunasekaran, N.; Rajadurai, S.; Carberry, James J.

doi:10.1007/bf00807194

Cited by 24 publications

(18 citation statements)

References 23 publications

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“…nitrogen and oxygen. Wide variety of catalysts were tested such as metal surfaces [8], supported metals [9][10][11], metal oxides [12,13], supported oxides [14,15], ternary oxides [16], spinels [13,[17][18][19][20][21][22][23][24][25], perovskites [26] hydrotalcites [27][28][29], and zeolites [30][31][32][33][34][35][36][37]. Focusing our attention to spinel oxide catalysts, a high laugh gas decomposition activity was reported for cobalt containing spinel oxides, such as Co 3 O 4 .…”

Section: Introductionmentioning

confidence: 99%

Nitrous Oxide Decomposition Over MCO3–Co3O4 (M = Ca, Sr, Ba) Catalysts

Abu-Zied

Soliman

2009

Catal Lett

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In this paper, nitrous oxide decomposition over a series of MCO 3 -Co 3 O 4 (M = Ca, Sr, Ba) catalysts having M/Co ratios of 0.1-0.4 has been studied. The various catalysts were characterized using thermal (TGA, DTA), XRD, IR and N 2 sorption techniques. N 2 O decomposition activity was found to be dependent on the type of the alkaline earth cation, the M/Co ratio, cobalt oxide crystallites sizes, and the calcination temperature.

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Section: Introductionmentioning

confidence: 99%

Nitrous Oxide Decomposition Over MCO3–Co3O4 (M = Ca, Sr, Ba) Catalysts

Abu-Zied

Soliman

2009

Catal Lett

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“…Catalysts, including supported noble metals, metal oxides, and perovskites, are active in direct catalytic N 2 O decomposition. [14][15][16] The commercial ironzeolite catalysts perform quite well in the presence of other gases, such as O 2 , NO x , or H 2 O, even in the presence of CO 2 and SO 2 . [17] However, metal oxide catalysts suffer from oxygen inhibition, and a low reaction rate of the N 2 O decomposition is observed.…”

mentioning

confidence: 99%

Direct Decomposition of Nitrous Oxide to Nitrogen by In Situ Oxygen Removal with a Perovskite Membrane

et al. 2009

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“…Thus, these materials have been implemented in diesel particulate NO x reduction filter (DPNR) [33][34][35][36][37][38][39]. On the other hand, the catalytic decomposition of nitrous oxide or nitric oxide has been reported as a one their potential applications [40][41][42][43][44][45][46]. Finally, perovskites have been widely implemented for NO x reduction in both stoichiometric gasoline engines (three-way catalyst, TWC) [33,[47][48][49][50][51][52][53] and diesel or lean-burn gasoline engines (NSR and SCR systems).…”

Section: Perovskite-based Catalysts In Automotive Exhaust Catalytic Cmentioning

confidence: 99%

Perovskite-Based Catalysts as Efficient, Durable, and Economical NOx Storage and Reduction Systems

2020

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Diesel engines operate under net oxidizing environment favoring lower fuel consumption and CO2 emissions than stoichiometric gasoline engines. However, NOx reduction and soot removal is still a technological challenge under such oxygen-rich conditions. Currently, NOx storage and reduction (NSR), also known as lean NOx trap (LNT), selective catalytic reduction (SCR), and hybrid NSR–SCR technologies are considered the most efficient control after treatment systems to remove NOx emission in diesel engines. However, NSR formulation requires high platinum group metals (PGMs) loads to achieve high NOx removal efficiency. This requisite increases the cost and reduces the hydrothermal stability of the catalyst. Recently, perovskites-type oxides (ABO3) have gained special attention as an efficient, economical, and thermally more stable alternative to PGM-based formulations in heterogeneous catalysis. Herein, this paper overviews the potential of perovskite-based formulations to reduce NOx from diesel engine exhaust gases throughout single-NSR and combined NSR–SCR technologies. In detail, the effect of the synthesis method and chemical composition over NO-to-NO2 conversion, NOx storage capacity, and NOx reduction efficiency is addressed. Furthermore, the NOx removal efficiency of optimal developed formulations is compared with respect to the current NSR model catalyst (1–1.5 wt % Pt–10–15 wt % BaO/Al2O3) in the absence and presence of SO2 and H2O in the feed stream, as occurs in the real automotive application. Main conclusions are finally summarized and future challenges highlighted.

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Catalytic decomposition of nitrous oxide over perovskite type solid oxide solutions and supported noble metal catalysts

Cited by 24 publications

References 23 publications

Nitrous Oxide Decomposition Over MCO3–Co3O4 (M = Ca, Sr, Ba) Catalysts

Nitrous Oxide Decomposition Over MCO3–Co3O4 (M = Ca, Sr, Ba) Catalysts

Direct Decomposition of Nitrous Oxide to Nitrogen by In Situ Oxygen Removal with a Perovskite Membrane

Perovskite-Based Catalysts as Efficient, Durable, and Economical NOx Storage and Reduction Systems

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