Effectiveness and mobility of catalysts for gasification of bitumen coke
Effectiveness and mobility of catalysts for gasification of bitumen coke
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DOI：
10.1016/j.fuel.2010.07.032
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发表时间：
2011-01-01
期刊：
影响因子：
7.4
通讯作者：
Gray, Murray R.
中科院分区：
文献类型：
--
作者：
Karimi, Arash;Gray, Murray R.
测试了化合物 K2CO3、KCl、Na2CO3、CaCO3、CaO 和 MgO 作为催化剂，在大气压和 600-800 摄氏度下将油砂沥青中的焦炭蒸汽气化。催化剂在焦炭形成之前添加到液态减压渣油中，并直接添加到焦炭固体中。 K2CO3 和 Na2CO3 是最有效的，无论它们是在焦炭形成之前还是之后添加，它们都能在 800 摄氏度下在 30 分钟内几乎完全转化。根据 SEM 和 EDX 分析，Ca 和 Mg 化合物不会促进催化反应，也不会与焦炭发生物理相互作用。仅在较高温度（800 摄氏度）下，KCl 才有效，但其程度低于 K2CO3 和 Na2CO3。碱金属化合物在焦炭相内表现出高流动性，这与其催化活性一致。 (C) 2010 Elsevier Ltd. 保留所有权利。
The compounds K2CO3, KCl, Na2CO3, CaCO3, CaO, and MgO were tested as catalysts for steam gasification of coke from oil sands bitumen at atmospheric pressure and 600-800 degrees C. Catalysts were added to liquid vacuum residue prior to coke formation and directly to the coke solids. K2CO3 and Na2CO3 were most effective, giving nearly complete conversion at 800 degrees C in 30 min, regardless of whether they were added before or after coke formation. Ca and Mg compounds did not promote catalytic reactions, nor did they interact physically with the coke based on SEM and EDX analyses. KCl was effective, to a lower extent than K2CO3 and Na2CO3 only at higher temperatures (800 degrees C). The alkali metal compounds showed high mobility within the coke phase, which was consistent with their catalytic activities. (C) 2010 Elsevier Ltd. All rights reserved.