SULFUR-RESISTANT METAL PROMOTED SMALL PORE ZEOLITE CATALYSTS

WIPO Patent Application WO/2022/174814

A1

The present invention relates to a SCR catalytic article, comprising -a substrate and -a copper-containing small pore zeolite, having a crystal structure characterized by a decrease of unit cell volume upon sulfurization and desulfurization of less than Å3 as determined by an X-ray powder diffraction, wherein the sulfurization and desulfurization are carried out in accordance with the processes as described in the specification, and to an exhaust treatment system comprising the same. The present invention also relates to a method for determining whether a metal-promoted small pore zeolite is resistant to irreversible sulfur poisoning and a method for evaluating whether a metal-promoted small pore zeolite is qualified for resistance to irreversible sulfur poisoning.

JP2004216201	METHOD AND APPARATUS FOR REMOVING BLACK SMOKE OF COMBUSTION EXHAUST GAS, INCOMPLETE COMBUSTION PRODUCT AND NOX
JP6990388	Exhaust gas treatment equipment

ZHANG JIADI (CN)
XUE WEN-MEI (US)
YANG XIAOFAN (US)
TANG WEIYONG (US)
BAYRAM BURCU (US)
HAO YUFEN (CN)

PCT/CN2022/076833

August 25, 2022

February 18, 2022

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BASF CORP (US)
ZHANG JIADI (CN)

B01D53/56; B01D53/86; B01J29/90; B01J35/04

CN107233932A	2017-10-10
CN105026038A	2015-11-04

ASHOK KUMAR, MICHAEL A. SMITH, KRISHNA KAMASAMUDRAM, NEAL W. CURRIER, HONGMEI AN, ALEKSEY YEZERETS: "Impact of different forms of feed sulfur on small-pore Cu-zeolite SCR catalyst", CATALYSIS TODAY, ELSEVIER, AMSTERDAM, NL, vol. 231, 1 August 2014 (2014-08-01), AMSTERDAM, NL , pages 75 - 82, XP055269067, ISSN: 0920-5861, DOI: 10.1016/j.cattod.2013.12.038

ZHONGZI LAW OFFICE (CN)

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