Low-vanadium catalyst as well as preparation method and application thereof

• Main Authors: SHAN WENPO, HE HONG, LIM CHUN-SEOK, LIAN ZHIHUA, ZHU YING, LI YINGJIE
• Format: Patent
• Language: Chinese; English
• Published: 21.04.2023
• 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 invention provides a low-vanadium catalyst as well as a preparation method and application thereof. The low-vanadium catalyst comprises a carrier and an active component, the carrier is NbtTi1-tOx, t is more than or equal to 0.1 and less than or equal to 0.5, and x is the number of O atoms required by element valence balance; the active component is vanadium oxide; on the basis that the mass of the carrier NbtTi (1-t) Ox is 100%, the vanadium oxide accounts for 0.8-1.2 wt% on the basis of V2O5. Compared with a traditional vanadium-titanium catalyst, the low-vanadium catalyst provided by the invention has the advantages that the operation temperature window is widened to 250-485 DEG C while the low vanadium content is ensured, the conversion rate of NOx within the temperature range reaches 90% or above, and the generation selectivity of N2 is good. 本发明提供了一种低钒催化剂及其制备方法与应用，所述低钒催化剂包括载体和活性组分；所述载体为NbtTi1-tOx，其中，0.1≤t≤0.5，x为满足元素化合价平衡所需的O原子数；所述活性组分为钒氧化物；以载体NbtTi1-tOx的质量为100％计，所述钒氧化物以V2O5计为0.8～1.2wt％。本发明提供的低钒催化剂在保