A new monolithic Pt-Pd-Rh motorcycle exhaust catalyst to meet future emission standards

Wang, Suning; Cui, Yajuan; Li, Lan; Shi, Zhuqun; Zhao, Ming; Gong, Maochu; Fang, Ruimei; Chen, Sijie; Chen, Yaoqiang

doi:10.1016/s1872-2067(14)60092-9

Cited by 9 publications

(2 citation statements)

References 27 publications

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“…40 Larger mesopores need a much higher pressure to make capillary condensation. Therefore, the fast growth of adsorption extent in the high-pressure region indicates the presence of abundant large pores, 41,42 which is well fit for steam reforming reaction. In addition, the dV/dr and the volume of the hysteresis loop change slightly after impregnation with less than 15% nickel.…”

Section: ■ Results and Discussionmentioning

confidence: 82%

Hydrogen-Rich Syngas Production by Toluene Reforming in a Microchannel Reactor Coated with Ni/MgO–Al₂O₃ Multifunctional Catalysts

Jiao

Zhang

et al. 2019

Ind. Eng. Chem. Res.

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Ni/MgO−Al 2 O 3 multifunctional catalysts were synthesized and applied to toluene reforming with a microchannel reactor to obtain hydrogen-rich syngas and lowest deactivation by carbon deposition. These catalysts were characterized by inductively coupled plasma-atomic emission spectroscopy, N 2 adsorption−desorption, X-ray diffraction, H 2temperature programmed reduction, NH 3 -temperature programmed desorption, and transmission electron microscope-energydispersive spectrometer. The results showed that MgO−Al 2 O 3 support had the largest Brunauer−Emmett−Teller surface area and formed a steady MgAl 2 O 4 spinel structure after 800 °C calcination, which is conducive to preventing Ni sintering, increasing Ni dispersion, and thus improving catalytic activity. Less than 15% Ni loading maintains a high dispersion on the MgO−Al 2 O 3 support, but 20% Ni loading caused a sharp decline in the surface area and dispersion effect, which is due to Ni sintering and pore plugging. Meanwhile, 15% Ni/MgO−Al 2 O 3 shows a higher catalytic activity and excellent stability than others. In addition, the microchannel structure increased the surface area-to-volume ratio and enhanced the heat-transfer coefficient, hence had a prominently promotive effect on the catalysts utilization efficiency.

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Section: ■ Results and Discussionmentioning

confidence: 82%

Hydrogen-Rich Syngas Production by Toluene Reforming in a Microchannel Reactor Coated with Ni/MgO–Al₂O₃ Multifunctional Catalysts

Jiao

Zhang

et al. 2019

Ind. Eng. Chem. Res.

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“…All the catalysts exhibited classic IV-type adsorption isotherms with a clear H2 hysteresis loop according to the IUPAC classification, a typical feature for mesoporous materials with slit-inkbottle-type mesopores in terms of the sharpness of the capillary condensation step (Figure 4a). 52 The pore size distribution derived from the desorption branch by using the Barrett-Joyner-Halenda method reveals that the pore radius of MA, PMA, and PMA-V catalysts ranges from 2 to 10 nm (Figure 4b). The maximum pore size of MA is 4 nm, and the values of PMA and PMA-V decrease with Pt introduction.…”

Section: Textural and Structuralmentioning

confidence: 99%

Synthesis of a High-Stability Nanosized Pt-Loaded MgAl₂O₄ Catalyst for n-Decane Cracking with Enhanced Activity and Durability

Jiao

Chen

Wang

et al. 2020

Ind. Eng. Chem. Res.

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Catalytic activity and stability, reflected in high conversion, heat sink, and time on stream, are the major concerns of endothermic hydrocarbon fuel cracking. In this work, we synthesized a stable MgAl2O4 spinel support by the co-precipitation method and a Pt/MgAl2O4 catalyst by the liquid-phase reduction-impregnation method (PMA-V) and incipient-wetness impregnation method (PMA). PMA-V showed a better catalytic activity and stability than PMA. Moreover, the heat sink and stability are significantly superior to the Pt-based catalysts in our previous published works. Through a series of catalyst characterization, we found that the high catalytic activity and stability over PMA-V are owing to the “accessible” Pt active sites with better dispersion and a smaller Pt size, which can efficiently alleviate Pt sintering, stronger metal–support interaction, suitable acidity–alkalinity, and a stable MgAl2O4 spinel structure. The valuable information provided in this work provides an effective approach to improve both catalytic activity and stability for hydrocarbon cracking.

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Effect of hydrothermal aging on CO and C3H6 oxidation over a Pt-Pd-based wiremesh catalyst as a motorcycle aftertreatment device

Taheri¹,

Hamzehlouyan²

2023

Applied Catalysis A: General

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A new monolithic Pt-Pd-Rh motorcycle exhaust catalyst to meet future emission standards

Cited by 9 publications

References 27 publications

Hydrogen-Rich Syngas Production by Toluene Reforming in a Microchannel Reactor Coated with Ni/MgO–Al₂O₃ Multifunctional Catalysts

Hydrogen-Rich Syngas Production by Toluene Reforming in a Microchannel Reactor Coated with Ni/MgO–Al₂O₃ Multifunctional Catalysts

Synthesis of a High-Stability Nanosized Pt-Loaded MgAl₂O₄ Catalyst for n-Decane Cracking with Enhanced Activity and Durability

Effect of hydrothermal aging on CO and C3H6 oxidation over a Pt-Pd-based wiremesh catalyst as a motorcycle aftertreatment device

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A new monolithic Pt-Pd-Rh motorcycle exhaust catalyst to meet future emission standards

Cited by 9 publications

References 27 publications

Hydrogen-Rich Syngas Production by Toluene Reforming in a Microchannel Reactor Coated with Ni/MgO–Al2O3 Multifunctional Catalysts

Hydrogen-Rich Syngas Production by Toluene Reforming in a Microchannel Reactor Coated with Ni/MgO–Al2O3 Multifunctional Catalysts

Synthesis of a High-Stability Nanosized Pt-Loaded MgAl2O4 Catalyst for n-Decane Cracking with Enhanced Activity and Durability

Effect of hydrothermal aging on CO and C3H6 oxidation over a Pt-Pd-based wiremesh catalyst as a motorcycle aftertreatment device

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Product

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Hydrogen-Rich Syngas Production by Toluene Reforming in a Microchannel Reactor Coated with Ni/MgO–Al₂O₃ Multifunctional Catalysts

Hydrogen-Rich Syngas Production by Toluene Reforming in a Microchannel Reactor Coated with Ni/MgO–Al₂O₃ Multifunctional Catalysts

Synthesis of a High-Stability Nanosized Pt-Loaded MgAl₂O₄ Catalyst for n-Decane Cracking with Enhanced Activity and Durability