采用浸渍法制备了Pt/CexZr1-xO2催化剂,通过X射线衍射和程序升温还原等方法对催化剂进行了表征,并在固定床反应器中评价了催化剂在合成气和含硫合成气中的水煤气变换活性.结果表明,铈锆固溶体的氧化还原能力强于CeO2,Zr的掺杂明显改善了CeO2的孔道结构,其担载的Pt催化剂具有更高的金属分散度,因而活性更高.两种催化剂在含硫合成气中的催化活性较无硫合成气中的均有所降低,且H2S浓度越大,催化剂活性下降越多,但这种因吸附硫而引起的失活是可逆的,即催化剂重新暴露在无H2S重整气的还原性气氛下活性能基本恢复.
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