Preparation process of scr catalyst comprising cu and fe-exchanged zeolite, said catalyst, system comprising said catalyst and exhaust gas treatment using such
Опубликовано: 18-10-2023
Автор(ы): Jeff H. Yang, Stanley A. Roth, Wen-Mei Xue
Принадлежит: BASF Corp
Реферат: The present invention relates to a process for preparing a catalyst for the selective catalytic reduction of nitrogen oxide A process for preparing a catalyst for the selective catalytic reduction of nitrogen oxide comprising (1) providing a zeolitic material comprising SiO 2 and X 2 O 3 in its framework structure, wherein X is a trivalent element; (2) subjecting the zeolitic material provided in (1) to an ion exchange procedure with one or more copper(ll) containing compounds; (3) preparing a slurry comprising the Cu ion-exchanged zeolitic material obtained in (2), one or more iron (ll) and/or iron (III) containing compounds, and a solvent system; (4) providing a substrate and coating the slurry obtained in (3) onto the substrate; (5) calcining the coated substrate obtained in (4). Furthermore, the present invention relates to a catalyst for the selective catalytic reduction of nitrogen oxide obtained according to the inventive process and to its use. In addition thereto, the present invention relates to an exhaust gas treatment system for the treatment of exhaust gas exiting from an internal combustion engine, the system comprising a catalyst for the selective catalytic reduction of nitrogen oxide according to the present invention. Finally, the present invention relates to a method for the selective catalytic reduction of nitrogen oxides which employs a catalyst for the selective catalytic reduction of nitrogen oxide according to the present invention.
Preparation process of scr catalyst comprising cu and fe-exchanged zeolite, said catalyst, system comprising said catalyst and exhaust gas treatment using such
Номер патента: EP4259329A1. Автор: Wen-Mei Xue,Stanley A. Roth,Jeff H. Yang. Владелец: BASF Corp. Дата публикации: 2023-10-18.