Catalyst for treating an exhaust gas, an exhaust system and a method

US10773252B2 · kind B2 · utility

Assignee

• Johnson Matthey Public Limited Company · GB

Inventors

• Silvia ALCOVE CLAVE · Reading, GB
• Paul Joseph Andersen · Audubon, US
• Maria Brandmair · Unterschleißheim, DE
• Manop Huber · Royston, GB
• Michael Nash · Cary, US
• David Repp · Royston, GB

Key dates

• Filing date: Mar 28, 2018
• Grant date: Sep 15, 2020
• Expiry date: Mar 28, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E50/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A catalyst for treating an exhaust gas comprising SO2, NOx and elemental mercury in the presence of a nitrogenous reductant comprises a composition containing oxides of: (i) Molybdenum (Mo) and/or Tungsten (W); (ii) Vanadium (V); (iii) Titanium (Ti), and (iv) an MFI zeolite, wherein the composition comprises, based on the total weight of the composition: (i) 1 to 6 wt % of MoO3 and/or 1 to 10 wt % WO3; and (ii) 0.1 to 3 wt % V2O5, and (iii) 48.5 to 94.5 wt % TiO2; and (iv) 35 to 50 wt % MFI zeolite.