SCR Catalyst for nitrogen oxide reduction under high temperature

• Main Author: UKROPEC ROBERT
• Format: Patent
• Language: Chinese; English
• Published: 08.03.2017
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to an SCR catalyst for reduction of nitrogen oxides at elevated temperatures. There is provided a process for producing a copper zeolite catalyst for selective catalytic reduction of nitrogen oxides, wherein the process comprises acid treatment of the provided zeolite matrix, calcination of the zeolite matrix and copper ions, and optionally further introduction of metal ions, wherein calcination at temperatures above 700 DEG C is carried out between these steps. The process may be carried out using a pure zeolite matrix or a zeolite matrix that already contains copper. The catalyst produced by the process and the corresponding exhaust aftertreatment system are also provided. 本发明涉及用于在高温下氮氧化物还原的SCR催化剂。提供用于产生用于氮氧化物的选择性催化还原的铜沸石催化剂的方法，其中方法包括所提供的沸石基体的酸处理、沸石基体的煅烧和铜离子以及任选地进步金属离子的后续引入，并且其中在高于700℃下的煅烧在这些步骤之间实施。方法可以利用纯净的沸石基体或已经包含铜的沸石基体来实施。也提供通过该方法产生的催化剂和相应的排气后处理系统。