一种WOx-ZrO2超强酸催化剂的制备方法

一种简单易行的新型ＷＯ↓［ｘ］－ＺｒＯ↓［２］超强酸催化剂制备方法，具体地说是将无定形ＺｒＯ（ＯＨ）↓［Ｘ］与Ｈ↓［２］ＷＯ↓［４］机械混合均匀后再于８００－８２５℃高温焙烧；所述催化剂的组成成分及范围重量比为：Ｐｔ０．３－０．６ＺｒＯ↓［２］７５－９５ＷＯ↓［ｘ］５－２５，其中ＺｒＯ↓［２］∶ＷＯ↓［Ｘ］的重量比为４－２０∶１。本催化剂在２００－４００℃范围内，对ｎ－Ｃ↓［７］临氢转化反应具有极高的异构化选择性及较高的活性。

Neodymium-cerium oxide as new thermal barrier coating material

Neodymium-cerium oxide (Nd2Ce2O7) was proposed as a new thermal barrier coating material in this work. Monolithic Nd2Ce2O7 powder was prepared by the solid-state reaction at 1400 degrees C. The phase composition, thermal stability and thermophysical properties of Nd2Ce2O7 were investigated. Nd2Ce2O7 with fluorite structure was thermally stable in the temperature range of interest for TBC applications. The results indicated that the thermal expansion coefficient (TEC) of Nd2Ce2O7 was higher than that of YSZ (6-8 Wt-% Y2O3 + ZrO2) and even more interesting was the TEC change as a function of temperature paralleling that of the superalloy bond coat. Moreover, the thermal conductivity of Nd2Ce2O7 is 30% lower than that of YSZ, which was discussed based on the theory of heat conduction. Thermal barrier coating of Nd2Ce2O7 was produced by atmospheric plasma spraying (APS) using the spray-dried powder. The thermal cycling was performed with a gas burner test facility to examine the thermal stability of the as-prepared coating.

ZrO2前体的制备方法对WOx-/ZrO2性质及正庚烷临氢转化反应性能的影响

中国科学院山西煤炭化学研究所

铁的添加方式对Cu-Mn/ZrO2合成低碳醇催化剂的影响

中国科学院山西煤炭化学研究所

Cu/Mn/Ni/ZrO2合成低碳醇催化剂组分作用的初步研究

中国科学院山西煤炭化学研究所