FTIR analysis of storage behavior and sulfur tolerance in barium-based NOx storage and reduction (NSR) catalysts

Fanson, Paul T.

doi:10.1016/s0926-3373(03)00275-3

Cited by 148 publications

(56 citation statements)

References 55 publications

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“…As compared the fresh and aged samples, it could be concluded that as the coverage of metal in the surface increased, the capacity of storage also increased. Similar observation were reported by Fanson et al (2003). However, the researchers were unable to unambiguously identify the species of the surface compound that resulted and were unsure of their exact origin.…”

Section: Characterization Of Catalystssupporting

confidence: 69%

Storage of Nitrous Oxide (NOx) in Diesel Engine Exhaust Gas using Alumina-Based Catalysts: Preparation, Characterization, and Testing

Alsobaai¹

2017

Jou. Eng. Res.

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This work investigated the nitrous oxide (NOx) storage process using alumina-based catalysts (K 2 O/Al 2 O 3 , CaO/Al 2 O 3, and BaO/Al 2 O 3 ). The feed was a synthetic exhaust gas containing 1,000 ppm of nitrogen monoxide (NO), 1,000 ppm i-C 4 H 10 , and an 8% O 2 and N 2 balance. The catalyst was carried out at temperatures between 250-450°C and a contact time of 20 minutes. It was found that NOx was effectively adsorbed in the presence of oxygen. The NOx storage capacity of K 2 O/Al 2 O 3 was higher than that of BaO/Al 2 O 3. The NOx storage capacity for K 2 O/Al 2 O 3 decreased with increasing temperature and achieved a maximum at 250°C. Potassium loading higher than 15% in the catalyst negatively affected the morphological properties. The combination of Ba and K loading in the catalyst led to an improvement in the catalytic activity compared to its single metal catalysts. As a conclusion, mixed metal oxide was a potential catalyst for de-NOx process in meeting the stringent diesel engine exhaust emissions regulations. The catalysts were characterized by a number of techniques and measurements, such as X-ray diffraction (XRD), electron affinity (EA), a scanning electron microscope (SEM), Brunner-Emmett-Teller (BET) to measure surface area, and pore volume and pore size distribution assessments.

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Section: Characterization Of Catalystssupporting

confidence: 69%

Storage of Nitrous Oxide (NOx) in Diesel Engine Exhaust Gas using Alumina-Based Catalysts: Preparation, Characterization, and Testing

Alsobaai¹

2017

Jou. Eng. Res.

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“…21 The MCM-41 was mixed with the platinum solution under constant stirring at room temperature and the methanol naturally evaporated overnight. The mixture was then dried in an oven at 373 K for 10 h, and calcined at 823 K for 3 h with temperature ramping from room temperature to 823 K at the rate of 5 K min À1 .…”

Section: Catalyst Synthesismentioning

confidence: 99%

One-step production of long-chain hydrocarbons from waste-biomass-derived chemicals using bi-functional heterogeneous catalysts

Wen

Barrow

Hattrick‐Simpers

et al. 2014

Phys. Chem. Chem. Phys.

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In this study, we demonstrate the production of long-chain hydrocarbons (C 8+ ) from 2-methylfuran (2MF) and butanal in a single step reactive process by utilizing a bi-functional catalyst with both acid and metallic sites. Our approach utilizes a solid acid for the hydroalkylation function and as a support as well as a transition metal as hydrodeoxygenation catalyst. A series of solid acids was screened, among which MCM-41 demonstrated the best combination of activity and stability. Platinum nanoparticles were then incorporated into the MCM-41. The Pt/MCM-41 catalyst showed 96% yield for C 8+ hydrocarbons and the catalytic performance was stable over four reaction cycles of 20 hour each. The reaction pathways for the production of long-chain hydrocarbons is probed with a combination of infrared spectroscopy and steady-state reaction experiments. It is proposed that 2MF and butanal go through hydroalkylation first on the acid site followed by hydrodeoxygenation to produce the hydrocarbon fuels.

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“…According to Yamazaki et al, Fe was found to decrease the sulfur uptake and promote the decomposition of BaSO 4 [29]. Fanson et al observed that Fe facilitated the formation of a bulk nitrate species which were suggested to be resilient against sulfur poisoning [30]. Kayhan et al reported that the initial NO x uptake mechanism and the ratio between the surface and bulk BaO sites were significantly influenced by Fe loading [20].…”

Section: Introductionmentioning

confidence: 99%

SO uptake and release properties of TiO2/Al2O3 and BaO/TiO2/Al2O3 mixed oxide systems as NO storage materials

et al. 2012

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FTIR analysis of storage behavior and sulfur tolerance in barium-based NOx storage and reduction (NSR) catalysts

Cited by 148 publications

References 55 publications

Storage of Nitrous Oxide (NOx) in Diesel Engine Exhaust Gas using Alumina-Based Catalysts: Preparation, Characterization, and Testing

Storage of Nitrous Oxide (NOx) in Diesel Engine Exhaust Gas using Alumina-Based Catalysts: Preparation, Characterization, and Testing

One-step production of long-chain hydrocarbons from waste-biomass-derived chemicals using bi-functional heterogeneous catalysts

SO uptake and release properties of TiO2/Al2O3 and BaO/TiO2/Al2O3 mixed oxide systems as NO storage materials

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