Pt/La-Ba-Al2O3/H-ZSM-5 Catalyst for Treating Hydrogen-Powered Vehicle Exhaust

Zheng, Lingmin; Liu, Zhimin; Zhu, Quan; Li, Yile; Yu, Quanwei; Chen, Yaoqiang; Gong, Maochu

doi:10.1016/s1872-2067(08)60106-0

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…Since zeolite supports offer good thermal stability [15,16], high tuneability and are commonly used in catalyst systems for NH 3 -SCR [17], several groups suggested zeolitic and zeolite-related catalysts also in the field of H 2 -SCR. By optimizing the preparation method, Wen achieved up to 70% NO conversion when using a Pd/MFI catalyst for H 2 -SCR in a H 2 O-free reaction gas mixture [18], while Zheng et al could achieve NOx conversions of 99% with a ZSM-5-based Pt-catalyst [19]. In addition, TiO 2 -promoted mesoporous materials were probed with platinum [20] and palladium [21] investigating the positive effect of TiO 2 on the reducibility of the noble metal particles and the enhancement in hydrogen spillover.…”

Section: Introductionmentioning

confidence: 99%

Selective Catalytic Reduction with Hydrogen for Exhaust gas after-treatment of Hydrogen Combustion Engines

2022

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In this work, two palladium-based catalysts with either ZSM-5 or Zeolite Y as support material are tested for their performance in selective catalytic reduction of NOx with hydrogen (H2-SCR). The ligh-toff measurements in synthetic exhaust gas mixtures typical for hydrogen combustion engines are supplemented by detailed catalyst characterization comprising N2 physisorption, X-ray powder diffraction (XRD), hydrogen temperature programmed reduction (H2-TPR) and ammonia temperature programmed desorption (NH3-TPD). Introducing 10% or 20% TiO2 into the catalyst formulations reduced the surface area and the number of acidic sites for both catalysts, however, more severely for the Zeolite Y-supported catalysts. The higher reducibility of the Pd particles that was uncovered by H2-TPR resulted in an improved catalytic performance during the light-off measurements and substantially boosted NO conversion. Upon exposition to humid exhaust gas, the ZSM-5-supported catalysts showed a significant drop in performance, whereas the Zeolite Y-supported catalyst kept the high levels of conversion while shifting the selectivity from N2O more toward NH3 and N2. The 1%Pd/20%TiO2/HY catalyst subject to this work outperforms one of the most active and selective benchmark catalyst formulations, 1%Pd/5%V2O5/20%TiO2-Al2O3, making Zeolite Y a promising support material for H2-SCR catalyst formulations that allow efficient and selective NOx-removal from exhaust gases originating from hydrogen-fueled engines.

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Section: Introductionmentioning

confidence: 99%

Selective Catalytic Reduction with Hydrogen for Exhaust gas after-treatment of Hydrogen Combustion Engines

2022

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Nano titania-supported sulfonic acid: An efficient and reusable catalyst for a range of organic reactions under solvent free conditions

Rahmani

Amoozadeh

Kolvari

2014

Catalysis Communications

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Palladium catalysts supported on carbon–nitrogen composites for aqueous-phase hydrogenation of phenol

Feng

Chen

Liu

2015

Catal. Sci. Technol.

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Phenol is an important component of pyrolysis bio-oil, especially from lignin, and the conversion of phenol is crucial for the production of biofuel. A cost-effective and efficient catalyst is worth developing in the hydrogenation of phenol. Herein we report that supported palladium nanoparticles on carbon-nitrogen composites with high surface area are highly active for aqueous-phase hydrogenation of phenol. The conversion of phenol was 91.7% within 1 h at 80°C. Higher activity was achieved at higher temperature. The synergy between palladium nanoparticles and the carbon-nitrogen composite support accelerated the hydrogenation of phenol, which clarified the crucial role played by the support. The hydrogenation of phenol highlights the potential of these catalysts for upgrading bio-oil.Catal. Sci. Technol. This journal is

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Pt/La-Ba-Al2O3/H-ZSM-5 Catalyst for Treating Hydrogen-Powered Vehicle Exhaust

Cited by 4 publications

References 8 publications

Selective Catalytic Reduction with Hydrogen for Exhaust gas after-treatment of Hydrogen Combustion Engines

Selective Catalytic Reduction with Hydrogen for Exhaust gas after-treatment of Hydrogen Combustion Engines

Nano titania-supported sulfonic acid: An efficient and reusable catalyst for a range of organic reactions under solvent free conditions

Palladium catalysts supported on carbon–nitrogen composites for aqueous-phase hydrogenation of phenol

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