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在固定催化反应装置上 ,用自制的三效催化剂 (APC型催化剂 )净化模拟液化石油气 (LPG )机动车的排气。实验考察了活性组分中铑含量对催化性能的影响。结果表明 ,在空速为 1 1 0 0 0h- 1 的条件下 ,Rh含量适中的 2 # 催化剂 ,其Pt/Pd/Rh =0 0 4 % /0 0 2 % /0 0 4 % ,在富氧区 5 4%～ 1 2 6%时的氧操作窗口比较宽 ,为 6 8% ;NO和CO的催化起燃温度分别低至 1 80℃和 2 2 5℃ ,但是HC的净化效果未受明显影响 ,净化率 >94% ;Rh含量与起燃温度的关系曲线成一“V”形 ,波谷位于Rh含量为 0 0 4 %之处 ;当Rh含量控制在 0 0 30 %～ 0 0 4 3%时 ,三效净化起燃温度不超过 2 5 0℃ ;动力转化能力高。
On a stationary catalytic reactor, the exhaust of a simulated liquefied petroleum gas (LPG) motor vehicle is purified with a self-made three-way catalyst (APC catalyst). The effect of rhodium content in the active component on the catalytic performance was investigated experimentally. The results show that Pt / Pd / Rh = 0 0 4% / 0 0 2% / 0 0 4% is suitable for the 2 # catalyst with moderate Rh content at airspeed of 1 1 0 0 0 h- The oxygen operating window at 54% ~ 126% of the oxygen zone is relatively wide at 68%; the catalytic light-off temperatures of NO and CO are as low as 180 ℃ and 225 ℃ respectively, but the purifying effect of HC is not affected by The Rh curve is a “V” shape with the trough at 0 0 4%. When the Rh content is controlled at 0 0 30% ~ 0 0 4 3 %, The three-way purification start-up temperature does not exceed 250 ℃; high power conversion capacity.