Characteristics of the Pd-only three-way catalysts prepared by sol-gel method

Jermim Noh; O. Bong Yang; Do Heui Kim; Seong Ihl Woo

doi:10.1016/S0920-5861(99)00145-5

Characteristics of the Pd-only three-way catalysts prepared by sol-gel method

Jermim Noh
, O. Bong Yang^*
, Do Heui Kim
, Seong Ihl Woo

^*Corresponding author for this work

Division of Chemical Engineering

Jeonbuk National University
Korea Advanced Institute of Science and Technology

Research output: Contribution to journal › Conference article › peer-review

39 Scopus citations

Abstract

Pd-only three-way catalysts prepared by the sol-gel method were investigated by the three-way catalytic performance test with a simulated exhaust gas in a continuous U-tube quartz reactor at a gas hourly space velocity of 72 000 h^-1. The catalysts were characterized with XRD, XPS, BET surface area and pore volume. The activity and thermal stability of the Pd-Al₂O₃ catalyst prepared at pH 10 were superior to those at pH 4 during hydrolysis and condensation, which could be explained by the anchoring effect. Zr and V were found to be good promoters for the enhancement of the thermal stability and SO₂ resistance, respectively. Optimally formulated catalyst, Pd(1)-V(2)-Zr(10)-AlO₃, was thermally stable up to 900°C and showed a much more improved low-temperature activity and excellent SO₂ resistance.

Original language	English
Pages (from-to)	575-582
Number of pages	8
Journal	Catalysis Today
Volume	53
Issue number	4
DOIs	https://doi.org/10.1016/S0920-5861(99)00145-5
State	Published - 1999.11.12
Event	Proceedings of the 1998 2nd World Congress on Environmental Catalysis 'Environmental Catalysis - Emission Control' - Miami, FL, United States Duration: 1998.11.15 → 1998.11.20

Keywords

Pd-only three-way catalyst
pH effect
Promoters
Sol-gel method
Thermal stability

Quacquarelli Symonds(QS) Subject Topics

Engineering - Petroleum
Engineering - Chemical
Chemistry

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10.1016/S0920-5861(99)00145-5

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title = "Characteristics of the Pd-only three-way catalysts prepared by sol-gel method",

abstract = "Pd-only three-way catalysts prepared by the sol-gel method were investigated by the three-way catalytic performance test with a simulated exhaust gas in a continuous U-tube quartz reactor at a gas hourly space velocity of 72 000 h-1. The catalysts were characterized with XRD, XPS, BET surface area and pore volume. The activity and thermal stability of the Pd-Al2O3 catalyst prepared at pH 10 were superior to those at pH 4 during hydrolysis and condensation, which could be explained by the anchoring effect. Zr and V were found to be good promoters for the enhancement of the thermal stability and SO2 resistance, respectively. Optimally formulated catalyst, Pd(1)-V(2)-Zr(10)-AlO3, was thermally stable up to 900°C and showed a much more improved low-temperature activity and excellent SO2 resistance.",

keywords = "Pd-only three-way catalyst, pH effect, Promoters, Sol-gel method, Thermal stability",

author = "Jermim Noh and Yang, \{O. Bong\} and Kim, \{Do Heui\} and Woo, \{Seong Ihl\}",

year = "1999",

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doi = "10.1016/S0920-5861(99)00145-5",

language = "English",

volume = "53",

pages = "575--582",

journal = "Catalysis Today",

issn = "0920-5861",

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note = "Proceedings of the 1998 2nd World Congress on Environmental Catalysis 'Environmental Catalysis - Emission Control' ; Conference date: 15-11-1998 Through 20-11-1998",

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TY - JOUR

T1 - Characteristics of the Pd-only three-way catalysts prepared by sol-gel method

AU - Noh, Jermim

AU - Yang, O. Bong

AU - Kim, Do Heui

AU - Woo, Seong Ihl

PY - 1999/11/12

Y1 - 1999/11/12

N2 - Pd-only three-way catalysts prepared by the sol-gel method were investigated by the three-way catalytic performance test with a simulated exhaust gas in a continuous U-tube quartz reactor at a gas hourly space velocity of 72 000 h-1. The catalysts were characterized with XRD, XPS, BET surface area and pore volume. The activity and thermal stability of the Pd-Al2O3 catalyst prepared at pH 10 were superior to those at pH 4 during hydrolysis and condensation, which could be explained by the anchoring effect. Zr and V were found to be good promoters for the enhancement of the thermal stability and SO2 resistance, respectively. Optimally formulated catalyst, Pd(1)-V(2)-Zr(10)-AlO3, was thermally stable up to 900°C and showed a much more improved low-temperature activity and excellent SO2 resistance.

AB - Pd-only three-way catalysts prepared by the sol-gel method were investigated by the three-way catalytic performance test with a simulated exhaust gas in a continuous U-tube quartz reactor at a gas hourly space velocity of 72 000 h-1. The catalysts were characterized with XRD, XPS, BET surface area and pore volume. The activity and thermal stability of the Pd-Al2O3 catalyst prepared at pH 10 were superior to those at pH 4 during hydrolysis and condensation, which could be explained by the anchoring effect. Zr and V were found to be good promoters for the enhancement of the thermal stability and SO2 resistance, respectively. Optimally formulated catalyst, Pd(1)-V(2)-Zr(10)-AlO3, was thermally stable up to 900°C and showed a much more improved low-temperature activity and excellent SO2 resistance.

KW - Pd-only three-way catalyst

KW - pH effect

KW - Promoters

KW - Sol-gel method

KW - Thermal stability

UR - https://www.scopus.com/pages/publications/0033550366

U2 - 10.1016/S0920-5861(99)00145-5

DO - 10.1016/S0920-5861(99)00145-5

M3 - Conference article

AN - SCOPUS:0033550366

SN - 0920-5861

VL - 53

SP - 575

EP - 582

JO - Catalysis Today

JF - Catalysis Today

IS - 4

T2 - Proceedings of the 1998 2nd World Congress on Environmental Catalysis 'Environmental Catalysis - Emission Control'

Y2 - 15 November 1998 through 20 November 1998

ER -

Characteristics of the Pd-only three-way catalysts prepared by sol-gel method

Abstract

Keywords

Quacquarelli Symonds(QS) Subject Topics

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