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【答案】应助回帖
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爱与雨下: 金币+1 2017-02-04 12:28:30
物是人非twg: 金币+100, 翻译EPI+1, ★★★很有帮助 2017-02-08 14:23:46
Ni-Mo catalysts were introduced by incipient wetness impregnation of the synthesized MCM-41 sieve. Aqueous solutions of Ni(CH3COO)2· 4H2O and (NH4)6Mo7O24· 4H2Owere used for the catalysts Ni-Mo/MCM-41. The MCM-41 was impregnated first with the required amount of aqueous solution of (NH4)6Mo7O24· 4H2O and dried at 1200C for 14 h；the dried material was calcined at 4500 for 6 h and at 5000C for 2 h in air. Then, the Mo/MCM-41 was impregnated with the required amount of Ni(CH3COO)2 · 4H2O, also dried at 1200 and calcined at 4500 for 6 h and at 500 0C for 2 h in air. In the case of Mo/MCM-41, MoO3 content was of 12 wt.% and, in the case of Ni-Mo/MCM-41 catalyst, the promoted NiO content was varied at 3, 6 and 9 wt.%,respectively. These catalysts are further referred to as Ni-Mo-0.25/MCM-41, Ni-Mo-0.50/MCM-41 and Ni-Mo-0.75/ MCM-41, respectively, where 0.25, 0.50 and 0.75 are the Ni/Mo atomic ratio.
通过合成MCM-41分子筛的等体积浸渍法来引入Ni-Mo催化剂。将Ni(CH3COO)2· 4H2O和(NH4)6Mo7O24· 4H2O的水溶液用于催化剂 Ni-Mo/MCM-41。首先，用所需量的 (NH4)6Mo7O24· 4H2O 的水溶液浸渍MCM-41，并在120℃下干燥14h；将干燥的材料在空气中于450℃下煅烧6h，并在500℃下煅烧2h。然后，用所需量的Ni(CH3COO)2 · 4H2O浸渍Mo/MCM-41，也在120℃下干燥，并在空气中于450℃下煅烧6h，并在500℃下煅烧2h。在Mo/MCM-41的情况下，MoO3含量是 12 wt.%。在Ni-Mo/MCM-41催化剂的情况下，促进的NiO 含量分别在 3, 6 和9 wt.%下变化。这些催化剂还分别称作 Ni-Mo-0.25/MCM-41, Ni-Mo-0.50/MCM-41 和Ni-Mo-0.75/ MCM-41, 其中0.25, 0.50 和 0.75 是 Ni/Mo 原子比例。
文献 第一页右下方第一段。
On the other hand, for the hydrogenation, the catalyst bed of approximately 30 mm length was packed between two quartz wool layers in the center of the reactor.
另一方面，对于氢化而言，在反应器的中央，将约30mm长的催化剂床填充在两个石英棉层之间。 |
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