Towards understanding the genesis and removal of NOx in FCC regenerators

J. O. Barth; A. Jentys; J. A. Lercher

Towards understanding the genesis and removal of NO_x in FCC regenerators

J. O. Barth, A. Jentys, J. A. Lercher

Technical University of Munich

Research output: Contribution to conference › Paper › peer-review

9 Scopus citations

Abstract

The regeneration of FCC catalysts leads to significant NO, emissions requiring the development of novel additives that catalyze in situ the reduction of NO_x to N₂ in the regenerator of the FCC unit to fulfill existing and anticipated logistic demands. Coke characterization was carried out using physicochemical techniques, i.e., IR and NMR spectroscope elemental analysis, and LD-/MALDI-TOF-MS spectroscopy. The surface chemistry during the FCC regeneration process was studied using TPD and oxidation experiments. From coke loaded spent FCC catalysts, NH₃ and HCN were formed via pyrolysis at > 350°C. The amount of NH₃ released was significantly influenced by the concentration of water in the samples. Higher water contents favored the formation of NH₃, which supports the hypothesis that nitrogen containing aromatic compounds, e.g., pyridine could react to NH₃ and CO₂ via hydrolysis. TPO experiments indicated that polvaromatic derivatives of pyrrole (carbazole) are cracked to CO and HCN, which could be subsequently oxidized to NO.

Original language	English
Pages	445-459
Number of pages	15
State	Published - 2002
Event	Proceedings of the 17th World Petroleum Congress - Rio de Janeiro, Brazil Duration: 1 Sep 2002 → 5 Sep 2002

Conference

Conference	Proceedings of the 17th World Petroleum Congress
Country/Territory	Brazil
City	Rio de Janeiro
Period	1/09/02 → 5/09/02

Cite this

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title = "Towards understanding the genesis and removal of NOx in FCC regenerators",

abstract = "The regeneration of FCC catalysts leads to significant NO, emissions requiring the development of novel additives that catalyze in situ the reduction of NOx to N2 in the regenerator of the FCC unit to fulfill existing and anticipated logistic demands. Coke characterization was carried out using physicochemical techniques, i.e., IR and NMR spectroscope elemental analysis, and LD-/MALDI-TOF-MS spectroscopy. The surface chemistry during the FCC regeneration process was studied using TPD and oxidation experiments. From coke loaded spent FCC catalysts, NH3 and HCN were formed via pyrolysis at > 350°C. The amount of NH3 released was significantly influenced by the concentration of water in the samples. Higher water contents favored the formation of NH3, which supports the hypothesis that nitrogen containing aromatic compounds, e.g., pyridine could react to NH3 and CO2 via hydrolysis. TPO experiments indicated that polvaromatic derivatives of pyrrole (carbazole) are cracked to CO and HCN, which could be subsequently oxidized to NO.",

author = "Barth, {J. O.} and A. Jentys and Lercher, {J. A.}",

year = "2002",

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note = "Proceedings of the 17th World Petroleum Congress ; Conference date: 01-09-2002 Through 05-09-2002",

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TY - CONF

T1 - Towards understanding the genesis and removal of NOx in FCC regenerators

AU - Barth, J. O.

AU - Jentys, A.

AU - Lercher, J. A.

PY - 2002

Y1 - 2002

N2 - The regeneration of FCC catalysts leads to significant NO, emissions requiring the development of novel additives that catalyze in situ the reduction of NOx to N2 in the regenerator of the FCC unit to fulfill existing and anticipated logistic demands. Coke characterization was carried out using physicochemical techniques, i.e., IR and NMR spectroscope elemental analysis, and LD-/MALDI-TOF-MS spectroscopy. The surface chemistry during the FCC regeneration process was studied using TPD and oxidation experiments. From coke loaded spent FCC catalysts, NH3 and HCN were formed via pyrolysis at > 350°C. The amount of NH3 released was significantly influenced by the concentration of water in the samples. Higher water contents favored the formation of NH3, which supports the hypothesis that nitrogen containing aromatic compounds, e.g., pyridine could react to NH3 and CO2 via hydrolysis. TPO experiments indicated that polvaromatic derivatives of pyrrole (carbazole) are cracked to CO and HCN, which could be subsequently oxidized to NO.

AB - The regeneration of FCC catalysts leads to significant NO, emissions requiring the development of novel additives that catalyze in situ the reduction of NOx to N2 in the regenerator of the FCC unit to fulfill existing and anticipated logistic demands. Coke characterization was carried out using physicochemical techniques, i.e., IR and NMR spectroscope elemental analysis, and LD-/MALDI-TOF-MS spectroscopy. The surface chemistry during the FCC regeneration process was studied using TPD and oxidation experiments. From coke loaded spent FCC catalysts, NH3 and HCN were formed via pyrolysis at > 350°C. The amount of NH3 released was significantly influenced by the concentration of water in the samples. Higher water contents favored the formation of NH3, which supports the hypothesis that nitrogen containing aromatic compounds, e.g., pyridine could react to NH3 and CO2 via hydrolysis. TPO experiments indicated that polvaromatic derivatives of pyrrole (carbazole) are cracked to CO and HCN, which could be subsequently oxidized to NO.

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M3 - Paper

AN - SCOPUS:0344983354

SP - 445

EP - 459

T2 - Proceedings of the 17th World Petroleum Congress

Y2 - 1 September 2002 through 5 September 2002

ER -

Towards understanding the genesis and removal of NO_x in FCC regenerators

Abstract

Conference

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