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主要对二甲醚低温蒸汽重整制氢的催化剂体系进行了研究。首先,采用溶胶-凝胶法制备了不同催化剂载体;然后,采用沉积沉淀法制备了一系列用于重整的PdZn系催化剂,并对其进行表征;将重整催化剂与水解催化剂(ZSM-5∶γ-Al_2O_3=2∶1)复合用于二甲醚蒸汽重整反应。结果表明:以ZrO_2为载体、Pd/Zn摩尔比为1∶6的Pd-Zn/ZrO_2,在400℃经H2还原,水醚比为3∶1时的反应中显示出较好的活性和较高的选择性。
The main catalyst of dimethyl ether low temperature steam reforming hydrogen system was studied. First, different catalyst supports were prepared by sol-gel method. Then, a series of PdZn catalysts for reforming were prepared by precipitation method. The catalysts were characterized by XRD, : Γ-Al 2 O 3 = 2: 1) is used for the steam reforming of dimethyl ether. The results showed that the Pd-Zn / ZrO 2 with Pd / Zn molar ratio of 1: 6 supported on ZrO 2 showed better activity in the reaction of reducing with H2 at 400 ℃ and the ratio of water to ether was 3:1 High selectivity.