Pyrolysis Behavior of Nickel-Loaded Loy Yang Brown Coals: Influence of Calcium Additive
Pyrolysis Behavior of Nickel-Loaded Loy Yang Brown Coals: Influence of Calcium Additive
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DOI：
10.1021/ef010235b
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发表时间：
2002-03
期刊：
影响因子：
5.3
通讯作者：
K. Murakami;Andnobuaki Arai;M. Shirai
中科院分区：
文献类型：
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作者：
K. Murakami;Andnobuaki Arai;M. Shirai
研究了负载镍-钙的洛阳褐煤的热解行为。负载镍-钙的洛阳褐煤（Ni负载量：4 - 7wt%）出现两个CO析出峰，一个在695 K，另一个在920 K，而负载镍的煤在670 - 690 K和920 K。在695 K时，通过向负载镍的Loy Yang煤中添加钙物种，CO的释放量增加。钙负载量不影响温度和CO释放量。EXAFS分析表明，镍金属颗粒在695 K时在负载镍-钙的洛阳褐煤中形成，而它们在670 - 690 K时在负载镍的煤中形成。镍物种的聚集行为解释了镍物种在载镍钙洛阳煤中的催化行为。
The pyrolysis behavior of nickel−calcium-loaded Loy Yang brown coals was studied. Two peaks of CO evolution appeared from nickel−calcium-loaded Loy Yang brown coal (Ni loadings: 4−7 wt %), one at 695 K and the other at 920 K, compared with those at 670−690 K and at 920 K from nickel-loaded coals. The amounts of CO evolved at 695 K were increased by adding calcium species to nickel-loaded Loy Yang coals. The calcium loadings did not affect the temperature and amount of CO evolution. EXAFS analysis showed that nickel metal particles were formed at 695 K in the nickel−calcium-loaded Loy Yang brown coals, while they were formed at 670−690 K in the nickel-loaded coals. The catalysis behavior of nickel species in the nickel−calcium-loaded Loy Yang coals is explained by the aggregation behavior of nickel species.