Standardization of Solid Superacid of Sulfated Zirconia Prepared Using Zirconia Supplied by Catalysis Society of Japan

使用日本催化学会提供的氧化锆制备的硫酸化氧化锆固体超强酸的标准化

基本信息

  • 批准号:
    18636016
  • 负责人:
  • 金额:
    $ 1.34万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2006
  • 资助国家:
    日本
  • 起止时间:
    2006 至 无数据
  • 项目状态:
    已结题

项目摘要

A recommended preparation procedure and applying method for some catalytic reactions were proposed based on the results of this investigation.As the starting material for catalyst preparation, JRC-ZRO-2 and-5 supplied by Catalysis Society of Japan are recommended. Zirconia gel should be well dried before sulfation at 300 ℃ or below.Two preparation methods of equilibrium adsorption method and ammonium sulfate kneading method had been investigated. The zirconia gel was sulfated with high reproducibility in both procedure. The sulfated zirconia with high surface area and high sulfate content was obtained when the non crystallized gel was used. The reproducibility of sulfate content on the surface was high in the ammonium sulfate kneading method. However, there was a tendency that unnecessary sulfate ions, which did not relate to the formation of active sites, remained on the surface. The recommended calcinations temperature is 650 ℃. From the reason of temperature distribution in a furnace, the calcinations at 600 ℃ is strongly recommended.The sulfated zirconia can be kept without care because this was calcined at high temperature. This can be applied for several reactions without pretreatment. It is desirable to remove adsorbed water by heating before use. The pretreatment at 500 ℃ is avoided because the decrease of acid amount was observed in some cases.Thermogravimetry is recommended as the method to confirm the sulfated zirconia production. The temperature of weight decrease accompanying the decomposition of sulfated ions should be checked.
在此基础上,提出了一些催化反应的制备方法和使用方法,并推荐了日本催化学会提供的JRC-ZRO-2和-5作为制备催化剂的起始原料。研究了平衡吸附法和硫酸铵捏合法两种制备氧化锆凝胶的方法。氧化锆凝胶硫酸化在两个程序中具有高重现性。采用非晶凝胶法制备的硫酸化氧化锆具有高比表面积和高硫酸盐含量。硫酸铵捏合法测定表面硫酸根含量的重现性好。然而,有一种趋势,不必要的硫酸根离子,这并不涉及形成的活性位点,留在表面上。推荐的煅烧温度为650 ℃。从炉内温度分布的角度考虑,建议在600 ℃下煅烧,高温煅烧后的硫酸化氧化锆可以随意保存。这可以应用于几个反应而无需预处理。希望在使用前通过加热除去吸附的水。由于在某些情况下酸量会减少,因此可避免在500 ℃下进行预处理。推荐热重法作为确定硫酸化氧化锆产品的方法。应检查伴随硫酸根离子分解的重量降低温度。

项目成果

期刊论文数量(0)
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科研奖励数量(0)
会议论文数量(0)
专利数量(0)

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MATSUHASHI Hiromi其他文献

MATSUHASHI Hiromi的其他文献

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{{ truncateString('MATSUHASHI Hiromi', 18)}}的其他基金

Synthesis of Surface Covered Solid Acid and Base
表面覆盖固体酸和碱的合成
  • 批准号:
    19560768
  • 财政年份:
    2007
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Evaluation of Surface Properties of Solid Acids by the Adsorption of Inert Gases
通过惰性气体吸附评价固体酸的表面性质
  • 批准号:
    14540524
  • 财政年份:
    2002
  • 资助金额:
    $ 1.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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