Co/Ce0.5Zr0.5O2催化剂的制备及甲烷部分氧化制合成气

余长林; 胡久彪; 翁维正; 周晓春; 陈喜蓉

Co/Ce_0.5Zr_0.5O₂催化剂的制备及甲烷部分氧化制合成气

1.
江西理工大学冶金与化学工程学院, 江西赣州 341000;
2.
厦门大学化学系, 固体表面物理化学国家重点实验室, 福建厦门 361005

基金项目: 国家自然科学基金(21067004); 厦门大学固体表面物理化学国家重点实验室开放基金(200906); 江西省自然科学基金(2010- GZH0048); 江西省教育厅科技项目(GJJ12344)。

详细信息

通讯作者:
余长林 (1974-), 湖南炎陵人, 男, 博士后, 副教授, 主要从事纳米催化新材料研究, Tel: 0797-8312334; E-mail : yuchanglinjx@163.com。

中图分类号: O643
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出版历程
- 收稿日期: 2011-10-26
- 修回日期: 2011-12-21
- 刊出日期: 2012-04-30

Preparation of Co/Ce_0.5Zr_0.5O₂ catalystsand their catalytic performance in methane partial oxidation to produce synthesis gas

1.
Scholl of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000,China;
2.
State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen 361005, China

摘要

摘要: 利用共沉淀法制备了具有介孔结构的Ce_0.5Zr_0.5O₂固溶体载体,然后浸渍不同质量分数(10%、20%、30%)的活性组分钴,制备了系列Co/Ce_0.5Zr_0.5O₂催化剂。利用N₂物理吸附(BET)、X射线粉末衍射(XRD)、H₂-程序升温还原(H₂-TPR)、扫描电子显微镜(SEM) 、透射电子显微镜(TEM) 、程序升温氧化(TPO)和热重(TG)等手段对制备和反应后的催化剂进行了表征,研究了它们对甲烷部分氧化制合成气反应的催化性能。研究结果表明,铈锆固溶体负载的钴比较容易被还原,该系列催化剂具有较高的活性和对H₂及CO的选择性,且随Co含量的增加,催化剂的活性和对H₂和CO的选择性得到提高的同时,也增强了催化剂的抗积炭性能。
- Ce_0.5Zr_0.5O₂固溶体 /
- 钴 /
- 甲烷部分氧化 /
- 合成气
Abstract: Porous Ce_0.5Zr_0.5O₂ solid solution support was first prepared by a co-precipitation method. Then, different concentrations of Co (10%, 20%, and 30 %) were loaded over Ce_0.5Zr_0.5O₂ by impregnation process. The fresh catalysts were characterized by some physicochemical characterizations such as N₂ physical adsorption(BET), X-ray diffraction (XRD), temperature-programmed reduction of hydrogen (H₂-TPR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The amount of deposited carbon over used catalysts was analyzed by temperature-programmed oxidation of oxygen (O₂-TPO) and thermogravimetry (TG). The catalytic performance of these Co/Ce_0.5Zr_0.5O₂ catalysts was evaluated by methane partial oxidation to produce synthesis gas. The results show that cobalt oxide is easy to be reduced to metal cobalt over Ce_0.5Zr_0.5O₂. This series of Co/Ce_0.5Zr_0.5O₂ catalysts show high activity and selectivity to H₂and CO. It was found that loading high concentration of Co could benefit the increase in catalytic activity and ability to resist the coke.
- porous Ce_0.5Zr_0.5O₂ solid solution /
- cobalt /
- methane partial oxidation /
- syngas

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参考文献(18)

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Co/Ce_0.5Zr_0.5O₂催化剂的制备及甲烷部分氧化制合成气

通讯作者:
余长林 (1974-), 湖南炎陵人, 男, 博士后, 副教授, 主要从事纳米催化新材料研究, Tel: 0797-8312334; E-mail : yuchanglinjx@163.com。

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Preparation of Co/Ce_0.5Zr_0.5O₂ catalystsand their catalytic performance in methane partial oxidation to produce synthesis gas

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