Preparation of Copper Chromite by Vaccum Freezing Drying Method and Its Catalytic Activity for Sulfuric Acid Decomposition
Preparation of Copper Chromite by Vaccum Freezing Drying Method and Its Catalytic Activity for Sulfuric Acid Decomposition
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真空冷冻干燥法制备亚铬酸铜及其对硫酸分解的催化活性
DOI：
10.1002/cjoc.201190001
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发表时间：
2010-12
影响因子：
5.4
通讯作者：
Chen Songzhe
中科院分区：
文献类型：
--
作者：
Su Tao;Zhang Ping;Wang Laijun;Chen Songzhe
碘硫法是最有前途的无CO2大规模制氢方法之一。在IS工艺所组成的三个反应中，硫酸分解是能量最密集的步骤，并且必须在催化剂存在下进行。制备了亚铬酸铜（CuCr 2 O 4），并对其进行了表征，将其用作硫酸分解反应的催化剂。采用真空冷冻干燥（VFD）共沉淀法制备CuCr 2 O 4，研究了共沉淀溶液的pH值、煅烧温度等影响CuCr 2 O 4结构的主要因素。结果表明，pH值对CuCr 2 O 4的粒径有影响，当pH值为7 ~ 8时，制备的CuCr 2 O 4粒径为纳米级。煅烧温度影响晶体的纯度。采用XRD、TEM、BET等手段对样品进行了表征。评价了VFD法制备的CuCr 2 O 4催化剂的活性，并与常规共沉淀法制备的CuCr 2 O 4和Pt/Al 2 O3催化剂进行了比较。结果表明，CuCr_2O_4的活性与Pt催化剂相近，但明显高于常规方法制备的CuCr_2O_4。此外，在70 h的试验中，该产品具有良好的稳定性。因此，它有望用于IS工艺的硫酸分解步骤。
Iodine sulfur (IS) process is one of the most promising routes for massive and CO2-free hydrogen production. Among the three reactions IS process composed, decomposition of sulfuric acid is the most energy intensive step and has to be conducted in the presence of catalyst. In this work, copper chromite (CuCr2O4) was prepared, characterized, and used as the catalyst for sulfuric acid decomposition reaction. The co-precipitation preparation method of CuCr2O4 which featured in vacuum freezing drying (VFD), was applied, and the main factors which influence the structure of CuCr2O4 such as pH values of the co-precipitation solution and calcination temperature were investigated. Results showed that pH value affected the size of copper chromite granule, when pH was between 7 and 8, the size of prepared CuCr2O4 was in nanometer scale. Calcination temperature influenced the purity of the crystal. The samples were characterized by XRD, TEM and BET. The catalytic activity of CuCr2O4 prepared by VFD was evaluated and compared with CuCr2O4 prepared by usual co-precipitation method and Pt/Al2O3. Results showed that the activity of CuCr2O4 was close to that of Pt catalyst, but apparently higher than that of CuCr2O4 prepared by usual method. In addition, it presents good stability in the 70 h test. Therefore, it was promising to be used in the sulfuric acid decomposition step of IS process.
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影响因子：
5.5
作者：
Abimanyu, Haznan;Jung, Kwang-Deog;Yoo, Kye Sang
通讯作者：
Yoo, Kye Sang
DOI：
10.1016/j.cattod.2008.03.029
发表时间：
2007-08
期刊：
--
影响因子：
--
作者：
S. Rashkeev;D. Ginosar;L. Petkovic;H. Farrell
通讯作者：
S. Rashkeev;D. Ginosar;L. Petkovic;H. Farrell
影响因子：
5.5
作者：
Youquan Deng;L. An
通讯作者：
Youquan Deng;L. An
影响因子：
7.2
作者：
A. Banerjee;M. Pai;K. Bhattacharya;A. Tripathi;V. S. Kamble;S. Bharadwaj;S. K. Kulshreshtha
通讯作者：
A. Banerjee;M. Pai;K. Bhattacharya;A. Tripathi;V. S. Kamble;S. Bharadwaj;S. K. Kulshreshtha
影响因子：
7.2
作者：
Funk, JE
通讯作者：
Funk, JE