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NiO-Ce0.5Zr0.5O2 catalysts prepared by citric acid method for steam reforming of ethanol
NiO-Ce0.5Zr0.5O2catalysts were prepared by citrate method and used for hydrogen production from steam reforming of ethanol (SRE). The effect of nickel content and space velocity on the catalytic performance was investigated. The prepared catalysts were character-ized with XRD and thermal analysis techniques. 20%NiO-Ce0.5Zr0.5O2 catalyst was very active and selective for hydrogen production via SRE, in which ethanol conversion of 100% could be obtained with feed component of 20% (H2O+EtOH) and 80% N2, water/ethanol of 3/1 in molar ratio at 350 ℃. Also, the catalyst showed good stability for anti-sintering and carbon-resistance. The XRD illuminated that both NiO and Ce0.5Zr0.5O2 crystal sizes were very small in NiO-Ce0.5Zr0.5O2 catalyst, and Ce0.5Zr0.5O2 solid solution was formed....
2020-10-22 17:35:41浏览：83
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添加Ce(La)的Pd/γ-Al2O3甲醇低温裂解催化剂的结构和性能
采用XRD、BET、NH3-TPD、TPR等方法对CeO2以及La2O3 和CeO2共同改性的γ-Al2O3担载Pd催化剂的结构和性能进行研究.结果表明,CeO2 改性的Pd/γ-Al2O3具有很高的甲醇低温分解活性,但表面酸性导致生成较多的二甲醚 ;La2O3的加入掩蔽了催化剂的表面酸性,同时促进了CeO2在γ-Al2O3载体内外表面的分散,使活性组分Pd和CeO2之间的相互作用加强,从而大大提高了甲醇的裂解率....
2020-06-12 15:51:01浏览：1417
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添加Ce(La)的Pd/γ-Al2O3甲醇低温裂解催化剂的结构和性能
采用XRD、BET、NH3-TPD、TPR等方法对CeO2以及La2O3 和CeO2共同改性的γ-Al2O3担载Pd催化剂的结构和性能进行研究.结果表明,CeO2 改性的Pd/γ-Al2O3具有很高的甲醇低温分解活性,但表面酸性导致生成较多的二甲醚 ;La2O3的加入掩蔽了催化剂的表面酸性,同时促进了CeO2在γ-Al2O3载体内外表面的分散,使活性组分Pd和CeO2之间的相互作用加强,从而大大提高了甲醇的裂解率....
2020-03-24 07:51:51浏览：1416
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