Studies of Al2O3-K catalysts prepared using various precursors for diesel soot elimination

Yiheng Zhang; Yongheng Zhang; Junhong Xu; Chengbin Jing; Fengli Zhang

doi:10.1016/j.tca.2007.11.015

Studies of Al₂O₃-K catalysts prepared using various precursors for diesel soot elimination

Yiheng Zhang, Yongheng Zhang, Junhong Xu, Chengbin Jing, Fengli Zhang

Qingdao University of Science and Technology

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The optimal calcination temperature was 600 °C and the highest activities were obtained at Al:K molar ratios of 3:1, 1:1 and 1:1 for Al₂O₃/KNO₃, Al(NO₃)₃/KNO₃ and Al₂O₃/KOH precursor combinations, respectively. The active compound in the catalyst prepared by Al(NO₃)₃/KNO₃ was KNO₃ exclusively. However, the catalytic activity of the catalysts prepared by Al₂O₃/KOH was affected by the formation of K₂Al₂O₄ and K₂CO₃ compounds. The catalysts prepared by all precursor combinations behaved a comparable thermal stability. High temperature aging of the catalysts would result in the loss of surface area and/or active compounds, and hence the deterioration of their catalytic activities.

Original language	English
Pages (from-to)	15-20
Number of pages	6
Journal	Thermochimica Acta
Volume	468
Issue number	1-2
DOIs	https://doi.org/10.1016/j.tca.2007.11.015
State	Published - 5 Feb 2008
Externally published	Yes

Keywords

AlO
Catalytic activity
Diesel soot elimination
Potassium

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10.1016/j.tca.2007.11.015

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title = "Studies of Al2O3-K catalysts prepared using various precursors for diesel soot elimination",

abstract = "The optimal calcination temperature was 600 °C and the highest activities were obtained at Al:K molar ratios of 3:1, 1:1 and 1:1 for Al2O3/KNO3, Al(NO3)3/KNO3 and Al2O3/KOH precursor combinations, respectively. The active compound in the catalyst prepared by Al(NO3)3/KNO3 was KNO3 exclusively. However, the catalytic activity of the catalysts prepared by Al2O3/KOH was affected by the formation of K2Al2O4 and K2CO3 compounds. The catalysts prepared by all precursor combinations behaved a comparable thermal stability. High temperature aging of the catalysts would result in the loss of surface area and/or active compounds, and hence the deterioration of their catalytic activities.",

keywords = "AlO, Catalytic activity, Diesel soot elimination, Potassium",

author = "Yiheng Zhang and Yongheng Zhang and Junhong Xu and Chengbin Jing and Fengli Zhang",

year = "2008",

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day = "5",

doi = "10.1016/j.tca.2007.11.015",

language = "英语",

volume = "468",

pages = "15--20",

journal = "Thermochimica Acta",

issn = "0040-6031",

publisher = "Elsevier B.V.",

number = "1-2",

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TY - JOUR

T1 - Studies of Al2O3-K catalysts prepared using various precursors for diesel soot elimination

AU - Zhang, Yiheng

AU - Zhang, Yongheng

AU - Xu, Junhong

AU - Jing, Chengbin

AU - Zhang, Fengli

PY - 2008/2/5

Y1 - 2008/2/5

N2 - The optimal calcination temperature was 600 °C and the highest activities were obtained at Al:K molar ratios of 3:1, 1:1 and 1:1 for Al2O3/KNO3, Al(NO3)3/KNO3 and Al2O3/KOH precursor combinations, respectively. The active compound in the catalyst prepared by Al(NO3)3/KNO3 was KNO3 exclusively. However, the catalytic activity of the catalysts prepared by Al2O3/KOH was affected by the formation of K2Al2O4 and K2CO3 compounds. The catalysts prepared by all precursor combinations behaved a comparable thermal stability. High temperature aging of the catalysts would result in the loss of surface area and/or active compounds, and hence the deterioration of their catalytic activities.

AB - The optimal calcination temperature was 600 °C and the highest activities were obtained at Al:K molar ratios of 3:1, 1:1 and 1:1 for Al2O3/KNO3, Al(NO3)3/KNO3 and Al2O3/KOH precursor combinations, respectively. The active compound in the catalyst prepared by Al(NO3)3/KNO3 was KNO3 exclusively. However, the catalytic activity of the catalysts prepared by Al2O3/KOH was affected by the formation of K2Al2O4 and K2CO3 compounds. The catalysts prepared by all precursor combinations behaved a comparable thermal stability. High temperature aging of the catalysts would result in the loss of surface area and/or active compounds, and hence the deterioration of their catalytic activities.

KW - AlO

KW - Catalytic activity

KW - Diesel soot elimination

KW - Potassium

UR - https://www.scopus.com/pages/publications/39149110273

U2 - 10.1016/j.tca.2007.11.015

DO - 10.1016/j.tca.2007.11.015

M3 - 文章

AN - SCOPUS:39149110273

SN - 0040-6031

VL - 468

SP - 15

EP - 20

JO - Thermochimica Acta

JF - Thermochimica Acta

IS - 1-2

ER -

Studies of Al₂O₃-K catalysts prepared using various precursors for diesel soot elimination

Abstract

Keywords

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