产品介绍在一定的排气温度范围内，利用尿素水溶液分解产生的氨为还原剂，将尾气中的 NOx还原成 N2，从而有效削减尾气中 NOx的排放。优点：目前柴油机SCR催化剂主要有钒基SCR催化剂和分子筛基SCR催化剂二大类。传统钒基SCR催化剂，耐硫性好，低毒，中温高转化效率;分子筛基SCR催化剂体系，其优点是温度窗口宽，高温

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Product Overview

Within a certain exhaust temperature range, the ammonia produced by decomposition of urea aqueous solution is used as a reducing agent to reduce NOx in the exhaust gas into N₂, thereby effectively reducing NOx emissions.

Advantages: Diesel SCR catalysts are mainly divided into two categories: vanadium-based SCR catalysts and zeolite-based SCR catalysts. Traditional vanadium-based SCR catalysts offer good sulfur resistance, low toxicity, and high conversion efficiency at medium temperatures. Zeolite-based SCR catalyst systems feature a wider temperature window, better high-temperature stability, higher purification efficiency, and non-toxicity, with performance significantly superior to V₂O₅/WO₃/TiO₂ catalysts.

Vanadium-based: V-SCR catalysts can meet China IV, China V on-road diesel emission standards and China V off-road small/medium-power diesel emission standards; Zeolite-based: mainly used for China V, China VI on-road diesel and China V and above off-road diesel emission standards.

Technical Specifications

Vanadium-Based SCR:

1) NOx conversion efficiency at 200°C ≥ 45%;

2) Catalytic reaction activity window > 260°C;

3) After 200 hours of aging at 550°C, catalyst deactivation ≤ 10%;

4) Catalytic performance meets China V emission regulations under WHTC and WHSC test conditions;

Copper-Based SCR:

1) NOx conversion efficiency at 200°C ≥ 80%;

2) Catalytic reaction activity window ≥ 320°C;

3) After 100 hours of aging at 650°C, average NOx conversion efficiency decline at each temperature point ≤ 5%;

4) Catalytic performance meets China VI emission regulations under WHTC, WHSC, and PEMS test conditions;