The Future of Vehicle Propulsion – Combustion Engines and Alternatives

Pischinger, Stefan

doi:10.1023/b:toca.0000029721.52972.e4

Cited by 18 publications

(10 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent contributions from our group, such perovskites as La(Fe, Mn, Co) 1-x Cu x O 3 were tested under a simulated atmosphere of the gasoline engine exhaust at stoichiometric oxygen content [7][8][9][10]. Facing a potential energy crisis, the use of both gasoline and diesel engines in lean burn conditions (over stoichiometric oxygen content), which achieves a more complete combustion of fuel became a popular tendency [2]. NO x abatement under such oxidizing conditions is a great challenge for the conventional TWCs because it requires the limited reductant to selectively react with NO rather than O 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Their elimination is therefore important and becomes one of the most challenging topics for researchers engaged in environmental catalysis. The internal combustion engines of motor vehicles are commonly divided into gasoline engine and diesel engine [2]. The pollutant emissions of the gasoline engine usually present a reductant/oxidant ratio close to stoichiometric.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Catalytic Conversion of NO and C3H6 in Exhaust Gases Over Silver Catalysts Under Stoichiometric or Excess Oxygen

2007

View full text Add to dashboard Cite

The role of Ag in simultaneously catalyzing NO reduction and C 3 H 6 oxidation was shown to be strongly dependent on the redox properties of its local environment. Under an atmosphere of 1,000 ppm NO, 3,000 ppm C 3 H 6 , and 1% O 2 and a GHSV of 30,000 h -1 , a perovskite La 0.88 Ag 0.12 FeO 3 prepared by reactive grinding is active giving a complete NO conversion and 92% C 3 H 6 conversion at 500°C. These values are much higher than the NO conversion of 55% and C 3 H 6 conversion of 45% obtained over a 3 wt.% Ag/Al 2 O 3 catalyst under the same conditions. Under an excess of oxygen (10% O 2 ) a good SCR performance with a plateau of N 2 yield above 97% over a wide temperature window of 350-500°C along with C 3 H 6 conversion of 90% at 500°C was observed over Ag/ Al 2 O 3 , while minor N 2 yields (~10% at 250-350°C) and high C 3 H 6 conversions (reaching~100% at 450°C) were obtained over La 0.88 Ag 0.12 FeO 3 . Abundant molecular oxygen is desorbed from Ag substituted perovskite after 10% O 2 adsorption as verified by O 2 -temperature programmed desorption (TPD). This reflects the strongly oxidative properties of La 0.88 Ag 0.12 FeO 3 , which lead to a satisfactory NO reduction at 1% O 2 due to the ease of nitrate formation but to a significant C 3 H 6 combustion above that value. The formation of nitrate species over the less oxidizing Ag/Al 2 O 3 was accelerated under an excess of oxygen resulting in an excellent lean NO reduction behavior. The redox properties of silver catalysts could be adjusted via mixing perovskite with alumina for an optimal elimination of both NO and C 3 H 6 over the whole range of oxygen concentration between 0 to 10%.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic Conversion of NO and C3H6 in Exhaust Gases Over Silver Catalysts Under Stoichiometric or Excess Oxygen

2007

View full text Add to dashboard Cite

show abstract

“…Hydrogen production for fuel cell powered automobiles is receiving increasing demand [1][2][3], but one of the major impediments to the use of this fuel is the difficulty of its storage, distribution and transportation. One route to solve these problems can be the on-board hydrogen generation from a suitable gas or liquid fuel [4].…”

Section: Introductionmentioning

confidence: 99%

One-step incorporation of Pd–Zn catalytic sites into organized mesoporous alumina for use in the oxidative steam reforming of methanol

Moretti

Lenarda

Storaro

et al. 2007

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…This system can operate in conjunction with diesel particle filters (DPF) to achieve stringent emissions levels [10,11] with a minimal fuel economy impact. At low temperature the NAC ab(ad)sorb the NO x and the DPF adsorb soot, while at high temperature the NAC desorbes the NO x that reaches the DPF burning the soot to produce N 2 , CO 2 and H 2 O [16][17][18][19]. In another case NAC system the nitrate is decomposed and re-circulated the NO x desorbed to the engine to be thermally destroyed [12].…”

Section: Introductionmentioning

confidence: 99%

Removal NO x from Lean Exhaust Gas by Absorption on Oxi-Anionic Materials

Cremona¹,

Fornasari

Livi

et al. 2008

Catal Lett

View full text Add to dashboard Cite

NO x sorption/desorption capacities of OxiAnionic materials were measured under representative exhaust gas mixture conditions at 300°C, with a NO x trap containing CaO and CuO x impregnated over a commercial c-Al 2 O 3 . These systems absorb (or adsorb) NO x in a gas stream containing both CO 2 at 300°C. In the case of a thermal desorption, the trapped NO x should desorb at a temperature below 550°C.

show abstract

The Future of Vehicle Propulsion – Combustion Engines and Alternatives

Cited by 18 publications

References 5 publications

Catalytic Conversion of NO and C3H6 in Exhaust Gases Over Silver Catalysts Under Stoichiometric or Excess Oxygen

Catalytic Conversion of NO and C3H6 in Exhaust Gases Over Silver Catalysts Under Stoichiometric or Excess Oxygen

One-step incorporation of Pd–Zn catalytic sites into organized mesoporous alumina for use in the oxidative steam reforming of methanol

Removal NO x from Lean Exhaust Gas by Absorption on Oxi-Anionic Materials

Contact Info

Product

Resources

About