Promoting Effects of Some Metal Additives on the Methanol Synthesis Activity of Sulfided Pd/SiO2 Catalyst from Syngas Containing H2S
Promoting Effects of Some Metal Additives on the Methanol Synthesis Activity of Sulfided Pd/SiO2 Catalyst from Syngas Containing H2S
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DOI：
10.1021/ef020242f
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发表时间：
2003-06
期刊：
影响因子：
5.3
通讯作者：
N. Koizumi;K. Murai;Seiko Tamayama;Toshihiko Ozaki;M. Yamada
中科院分区：
文献类型：
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作者：
N. Koizumi;K. Murai;Seiko Tamayama;Toshihiko Ozaki;M. Yamada
在硫化态Pd/SiO2催化剂上掺杂各种金属添加剂（M：Li、K、Cs、Mg、Ca、Sr、Ba、Sc、Y、La、Nd、Mn、Zn或Al），用于CO加氢合成甲醇。Ca、Y、La、Nd的添加显著提高了甲醇合成活性，其中Ca的效果最好。此外，硫化Pd/SiO2掺杂Ca添加剂的甲醇合成活性的变化，取决于前驱体的制备方法。前驱体浸渍含钯溶液后的煅烧有利于提高甲醇合成活性。掺杂有Ca添加剂的活性最高的催化剂在593 K和5.1 MPa下产生720 g kg-cat-1 h-1的甲醇，这是用商业Cu/Zn/Al催化剂在593 K和5.1 MPa下从含CO2的合成气获得的甲醇时空产率的约50%。此外，即使在H_2S存在下，掺杂Ca的硫化Pd/SiO_2催化剂仍具有较好的催化活性。
A sulfided Pd/SiO2 catalyst was doped with various kinds of metal additives (M: Li, K, Cs, Mg, Ca, Sr, Ba, Sc, Y, La, Nd, Mn, Zn, or Al) and used for methanol synthesis from CO hydrogenation. The addition of Ca, Y, La, or Nd significantly improved the activity for methanol synthesis, and among these additives, Ca was the most effective additive. Besides, the methanol synthesis activity of the sulfided Pd/SiO2 doped with the Ca additive changed, depending on the preparation method of the precursor. The calcination of the precursor after impregnating with the Pd-containing solution was helpful for improving the methanol synthesis activity. The most active catalyst doped with the Ca additive yielded 720 g kg-cat-1 h-1 of methanol at 593 K and 5.1 MPa, which was about 50% of the space−time yield of methanol that is obtained with a commercial Cu/Zn/Al catalyst at 593 K and 5.1 MPa from a syngas containing CO2. Besides, even in the presence of H2S, the sulfided Pd/SiO2 catalyst doped with the Ca additive prese...