活性基质在降烯烃渣油裂化催化剂中的应用
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摘要: 研究了渣油裂化催化剂的基质改性对催化剂性能的影响。结果表明，经高温及酸处理后，高岭土的孔容、比表面及其表面酸性明显增加；对拟薄水铝石进行磷改性，可增加氧化铝的表面酸性中心数目，降低酸强度。用改性的高岭土和氧化铝作为降烯烃渣油裂化催化剂的活性基质，可提高催化剂的渣油裂化及氢转移、异构化活性，并减少催化剂上的积碳。Abstract: This paper presents the influence of the modified matrices of RFCC catalysts on the acidity and activity. The result shows that the surface area, pore volume and acidity of kaolin clay are all increased when it is baked and modified with acid. It also shows that when aluminum oxide is modified with phosphorus, its acid site is increased but acid strength is weakened. When these modified materials are used as the matrices of the olefin-reduce residual oil cracking catalysts, the activity for cracking and hydrogen-transfer as well as isomerization raise and the coke yield reduces.
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Key words:
- modification /
- matrices /
- heave oil cracking /
- decreasing olefin
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