A comparison of Rh/CeO2/SiO2 catalysts with steam reforming catalysts, dolomite and inert materials as bed materials in low throughput fluidized bed gasification systems
A comparison of Rh/CeO2/SiO2 catalysts with steam reforming catalysts, dolomite and inert materials as bed materials in low throughput fluidized bed gasification systems
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DOI：
10.1016/s0961-9534(03)00105-3
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发表时间：
2004-01-01
影响因子：
6
通讯作者：
Tomishige, K
中科院分区：
文献类型：
--
作者：
Asadullah, M;Miyazawa, T;Tomishige, K
在实验室规模的流化床反应器中，使用空气作为气化剂，在低温（823-973 K）下，在 Rh/CeO2/SiO2 存在下对雪松木进行气化，以生产用于燃气轮机发电的高质量燃气。通过测量冷气效率、焦油浓度、气体碳转化率和气体组成，将 Rh/CeO2/SiO2 催化剂的性能与常规催化剂（如商用蒸汽重整催化剂 G-91、白云石和非催化剂体系）进行了比较。 Rh/CeO2/SiO2 催化产物气体中的焦油浓度完全可以忽略不计，而 G-91、白云石和非催化产物气体中的焦油浓度分别约为 30、113 和 139 g/m(3)。由于在 873 K 时，Rh/CeO2/SiO2 催化剂上碳转化为有用气体（例如 CO、H-2 和 CH4）的效率比其他催化剂高得多，因此在这种情况下冷气体效率比其他催化剂高得多（71%）。产物气体中的氢含量 (> 24 vol%) 远高于燃气涡轮发动机有效燃烧的规定水平 (> 10 vol%)。 Rh/CeO2/SiO2 催化剂上的焦炭和焦炭形成量也比传统催化剂低。尽管在至少20次实验中使用相同催化剂后催化剂表面积略有下降，但失活问题并不严重。 (C) 2003 Elsevier Ltd. 保留所有权利。
The gasification of cedar wood in the presence of Rh/CeO2/SiO2 has been conducted in the laboratory scale fluidized bed reactor using air as a gasifying agent at low temperatures (823-973 K) in order to produce high-quality fuel gas for gas turbine for power generation. The performance of the Rh/CeO2/SiO2 catalyst has been compared with conventional catalysts such as commercial steam reforming catalyst G-91, dolomite and noncatalyst systems by measurements of the cold gas efficiency, tar concentration, carbon conversion to gas and gas composition. The tar concentration was completely negligible in the Rh/CeO2/SiO2-catalyzed product gas whereas it was about 30, 113, and 139 g/m(3) in G-91, dolomite and noncatalyzed product gas, respectively. Since the carbon conversion to useful gas such as CO, H-2, and CH4 are much higher on Rh/CeO2/SiO2 catalyst than others at 873 K, the cold gas efficiency is much higher (71%) in this case than others. The hydrogen content in the product gas is much higher ( > 24 vol%) than the specified level ( > 10 vol%) for efficient combustion in the gas turbine engine. The char and coke formation is also very low on Rh/CeO2/SiO2 catalyst than on the conventional catalysts. Although the catalyst surface area was slightly decreased after using the same catalyst in at least 20 experiments, the deactivation problem was not severe. (C) 2003 Elsevier Ltd. All rights reserved.