EFFECT OF COPPER CONTENTS OIL SULFUR POISONING OF COPPER ION-EXCHANGED MORDENITE FOR NO REDUCTION BY NH3

被引：29

作者：

HAM, SW ^{[1
]}

CHOI, H ^{[1
]}

NAM, IS ^{[1
]}

KIM, YG ^{[1
]}

机构：

[1] POHANG UNIV SCI & TECHNOL,CATALYT TECHNOL RES CTR,RES INST IND SCI & TECHNOL,DEPT CHEM ENGN,POHANG 790330,SOUTH KOREA

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1995年 / 34卷 / 05期

关键词：

D O I：

10.1021/ie00044a014

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Deactivation of copper ion-exchanged mordenite (CuHM) catalysts with different copper contents by SO2 for NO reduction with NH3 was examined in a fixed bed flow reactor. A larger amount of deactivating agent deposits on the catalyst surface with the increase of copper contents under the same operating conditions. The deactivating agents deposited on the copper-exchanged mordenite catalysts were mainly (NH4)(2)SO4 and/or NH4HSO4 from the results of thermal analyses such as thermogravimetric analysis (TGA), differential thermal analysis (DTA), and temperature-programmed desorption (TPD). The formation of the ammonium salts largely depends on the reaction temperature and SO3 concentration generated from SO2 oxidation which is a reaction catalyzed primarily by copper ions on the catalyst surface. The catalytic activity and surface area of the deactivated catalysts are well-correlated with the sulfur content deposited on the catalyst surface, depending upon the reaction temperatures and its catalyst copper contents.

引用

页码：1616 / 1623

页数：8

共 21 条

[1]

Choi E.Y., Nam I.S., Kim Y.G., Chung J.S., Lee J.S., Nomura M., An X-ray Absorption Study of Copper Ion Exchanged H-mordenite for Selective Catalytic Reduction of NO by NH3, J. Mol. Catal., 69, (1991)

[2]

Flentge D.R., Lunsford J.H., Jacobs P.A., Uytterhoeven J.B., Spectroscopic Evidence for the Tetraamminecopper(II) Complex in a Y-Type Zeolite, J. Phys. Chem., 79, (1975)

[3]

Ham S.W., Choi H., Nam I.S., Kim Y.G., Deactivation of Copper-Ion-Exchanged Hydrogen-Mordenite-Type Zeolite Catalyst by SO2 for NO Reduction by NH3, Catal. Today, 11, (1992)

[4]

Kiovsky J.R., Koradia P.B., Lim C.T., Evaluation of a New Zeolitic Catalyst for NOx Reduction with NH3, Ind. Eng. Chem. Prod. Res. Dev., 19, (1980)

[5]

Kiyoura R., Urano K., Mechanism, Kinetics, and Equilibrium of Thermal Decomposition of Ammonium Sulfate, Ind. Eng. Chem. Prod. Res. Dev., 9, 4, (1970)

[6]

Knoblauch K., Richter E., Juntgen H., Application of Active Coke in Processes of SO2- and NOx-removal from Flue Gases, Fuel, 60, (1981)

[7]

Kusakabe K., Kashima M., Morooka S., Kato Y., Rate of Reduction of Nitric Oxide with Ammonia on Coke Catalysts Activated with Sulphuric Acid, Fuel, 67, (1988)

[8]

Kusakabe K., Kawamura H., Kim H.J., Morooka S., Effect of SO2 on Coke Catalysed Reduction of NO by Ammonia, Fuel, 69, (1990)

[9]

Matsuda S., Kamo T., Kato A., Nakajima F., Deposition of Ammonium Bisulfate in the Selective Catalytic Reduction of Nitrogen Oxides with Ammonia, Ind. Eng. Chem. Prod. Res. Dev., 21, (1982)

[10]

Medros F.G., Eldridge J.W., Kittrell J.R., Dual-Catalyst System to Broaden the Window of Operability in the Reduction of NOx with Ammonia, Ind. Eng. Chem. Res., 28, (1989)

← 1 2 3 →