Novel derivatives of MCM-36 as catalysts for the reduction of nitrogen oxides from FCC regenerator flue gas streams

Jan Olaf Barth; Andreas Jentys; Eleni F. Iliopoulou; Iacovos A. Vasalos; Johannes A. Lercher

doi:10.1016/j.jcat.2004.06.021

Novel derivatives of MCM-36 as catalysts for the reduction of nitrogen oxides from FCC regenerator flue gas streams

Jan Olaf Barth
, Andreas Jentys
, Eleni F. Iliopoulou
, Iacovos A. Vasalos
, Johannes A. Lercher

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

28 Scopus citations

Abstract

MCM-36 materials containing mixed oxide pillars (MgO-Al ₂O ₃-MCM-36, BaO-Al ₂O ₃-MCM-36, MgO-Al ₂O ₃SiO ₂-MCM-36, BaO-Al ₂O ₃SiO ₂-MCM-36) were investigated as additives for the in situ reduction of NO _x formed during the regeneration of coked cracking catalysts in FCC units. The additives were investigated under reaction conditions similar to the oxygen-depleted and the oxygen-enriched zone of the FCC regenerator. MCM-36-type materials with basic mixed oxide clusters in the interlayer galleries showed high NO conversions (∼85%) and high N ₂ yields (∼80%) under oxygen-deficient reaction conditions. The catalytic activity of MCM-36 with alkaline earth metal aluminum oxide pillars incorporated between the zeolitic layers was higher (MgO-Al ₂O ₃-MCM-36: 77% N ₂ yield at 650°C) compared to the nonpillared parent material MCM-22 (22%). The materials have been added in regeneration experiments to industrial (coked) FCC catalysts in a fluidized-bed reactor. The materials led to a reduction of NO emissions also in the presence of Pt-based CO combustion promoters (∼30% NO reduction). It is speculated that Brønsted acid sites in the zeolite layers of the composite materials catalyze the reduction of NO with NH ₃, which is an intermediate in the regeneration of nitrogen-containing carbonaceous deposits on deactivated FCC catalysts.

Original language	English
Pages (from-to)	117-129
Number of pages	13
Journal	Journal of Catalysis
Volume	227
Issue number	1
DOIs	https://doi.org/10.1016/j.jcat.2004.06.021
State	Published - 1 Oct 2004

Keywords

Fluid catalytic cracking (FCC)
NO reduction
Oxidative regeneration
Pillared zeolites

Access to Document

10.1016/j.jcat.2004.06.021

Cite this

@article{9728844e9afa4d5e86cfa7a3af07185d,

title = "Novel derivatives of MCM-36 as catalysts for the reduction of nitrogen oxides from FCC regenerator flue gas streams",

abstract = "MCM-36 materials containing mixed oxide pillars (MgO-Al 2O 3-MCM-36, BaO-Al 2O 3-MCM-36, MgO-Al 2O 3SiO 2-MCM-36, BaO-Al 2O 3SiO 2-MCM-36) were investigated as additives for the in situ reduction of NO x formed during the regeneration of coked cracking catalysts in FCC units. The additives were investigated under reaction conditions similar to the oxygen-depleted and the oxygen-enriched zone of the FCC regenerator. MCM-36-type materials with basic mixed oxide clusters in the interlayer galleries showed high NO conversions (∼85\%) and high N 2 yields (∼80\%) under oxygen-deficient reaction conditions. The catalytic activity of MCM-36 with alkaline earth metal aluminum oxide pillars incorporated between the zeolitic layers was higher (MgO-Al 2O 3-MCM-36: 77\% N 2 yield at 650°C) compared to the nonpillared parent material MCM-22 (22\%). The materials have been added in regeneration experiments to industrial (coked) FCC catalysts in a fluidized-bed reactor. The materials led to a reduction of NO emissions also in the presence of Pt-based CO combustion promoters (∼30\% NO reduction). It is speculated that Br{\o}nsted acid sites in the zeolite layers of the composite materials catalyze the reduction of NO with NH 3, which is an intermediate in the regeneration of nitrogen-containing carbonaceous deposits on deactivated FCC catalysts.",

keywords = "Fluid catalytic cracking (FCC), NO reduction, Oxidative regeneration, Pillared zeolites",

author = "Barth, \{Jan Olaf\} and Andreas Jentys and Iliopoulou, \{Eleni F.\} and Vasalos, \{Iacovos A.\} and Lercher, \{Johannes A.\}",

note = "Funding Information: Financial support of the European Union (Project G1RD-CT99-0065-“DENOXPRO”) is gratefully acknowledged. The authors thank Dr. H. Rhemann (OMV), Dr. R. Harding, Dr. J. Nee, and Dr. G. McElhiney (GRACE-Davison) for helpful discussions concerning FCC deNO x technologies.",

year = "2004",

month = oct,

day = "1",

doi = "10.1016/j.jcat.2004.06.021",

language = "English",

volume = "227",

pages = "117--129",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Academic Press Inc.",

number = "1",

}

TY - JOUR

T1 - Novel derivatives of MCM-36 as catalysts for the reduction of nitrogen oxides from FCC regenerator flue gas streams

AU - Barth, Jan Olaf

AU - Jentys, Andreas

AU - Iliopoulou, Eleni F.

AU - Vasalos, Iacovos A.

AU - Lercher, Johannes A.

N1 - Funding Information: Financial support of the European Union (Project G1RD-CT99-0065-“DENOXPRO”) is gratefully acknowledged. The authors thank Dr. H. Rhemann (OMV), Dr. R. Harding, Dr. J. Nee, and Dr. G. McElhiney (GRACE-Davison) for helpful discussions concerning FCC deNO x technologies.

PY - 2004/10/1

Y1 - 2004/10/1

N2 - MCM-36 materials containing mixed oxide pillars (MgO-Al 2O 3-MCM-36, BaO-Al 2O 3-MCM-36, MgO-Al 2O 3SiO 2-MCM-36, BaO-Al 2O 3SiO 2-MCM-36) were investigated as additives for the in situ reduction of NO x formed during the regeneration of coked cracking catalysts in FCC units. The additives were investigated under reaction conditions similar to the oxygen-depleted and the oxygen-enriched zone of the FCC regenerator. MCM-36-type materials with basic mixed oxide clusters in the interlayer galleries showed high NO conversions (∼85%) and high N 2 yields (∼80%) under oxygen-deficient reaction conditions. The catalytic activity of MCM-36 with alkaline earth metal aluminum oxide pillars incorporated between the zeolitic layers was higher (MgO-Al 2O 3-MCM-36: 77% N 2 yield at 650°C) compared to the nonpillared parent material MCM-22 (22%). The materials have been added in regeneration experiments to industrial (coked) FCC catalysts in a fluidized-bed reactor. The materials led to a reduction of NO emissions also in the presence of Pt-based CO combustion promoters (∼30% NO reduction). It is speculated that Brønsted acid sites in the zeolite layers of the composite materials catalyze the reduction of NO with NH 3, which is an intermediate in the regeneration of nitrogen-containing carbonaceous deposits on deactivated FCC catalysts.

AB - MCM-36 materials containing mixed oxide pillars (MgO-Al 2O 3-MCM-36, BaO-Al 2O 3-MCM-36, MgO-Al 2O 3SiO 2-MCM-36, BaO-Al 2O 3SiO 2-MCM-36) were investigated as additives for the in situ reduction of NO x formed during the regeneration of coked cracking catalysts in FCC units. The additives were investigated under reaction conditions similar to the oxygen-depleted and the oxygen-enriched zone of the FCC regenerator. MCM-36-type materials with basic mixed oxide clusters in the interlayer galleries showed high NO conversions (∼85%) and high N 2 yields (∼80%) under oxygen-deficient reaction conditions. The catalytic activity of MCM-36 with alkaline earth metal aluminum oxide pillars incorporated between the zeolitic layers was higher (MgO-Al 2O 3-MCM-36: 77% N 2 yield at 650°C) compared to the nonpillared parent material MCM-22 (22%). The materials have been added in regeneration experiments to industrial (coked) FCC catalysts in a fluidized-bed reactor. The materials led to a reduction of NO emissions also in the presence of Pt-based CO combustion promoters (∼30% NO reduction). It is speculated that Brønsted acid sites in the zeolite layers of the composite materials catalyze the reduction of NO with NH 3, which is an intermediate in the regeneration of nitrogen-containing carbonaceous deposits on deactivated FCC catalysts.

KW - Fluid catalytic cracking (FCC)

KW - NO reduction

KW - Oxidative regeneration

KW - Pillared zeolites

UR - https://www.scopus.com/pages/publications/4344650072

U2 - 10.1016/j.jcat.2004.06.021

DO - 10.1016/j.jcat.2004.06.021

M3 - Article

AN - SCOPUS:4344650072

SN - 0021-9517

VL - 227

SP - 117

EP - 129

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 1

ER -

Novel derivatives of MCM-36 as catalysts for the reduction of nitrogen oxides from FCC regenerator flue gas streams

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this