| MPN无毒钝镍剂的开发与应用 |
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| 引用本文： | 叶天旭,潘惠芳. MPN无毒钝镍剂的开发与应用[J]. 炼油技术与工程, 2001, 31(6): 27-29 |
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| 作者姓名： | 叶天旭 潘惠芳 |
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| 作者单位： | 1. 石油大学华东
2. 石油大学北京 |
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| 基金项目： | 中国石油天然气集团公司“九五”科技攻关项目 ((96)科字第198号 ) |
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| 摘 要： | MPN钝镍剂在呼和浩特炼油厂的FCC工业装置上显示出良好的钝镍效果。在Ni,Mg摩尔比为 1时 ,氢气产率降低 3 9% ,焦炭产率降低 12 %。通过MAT ,TPR ,XRD等实验方法和量化计算系统研究了MPN的钝镍机理。结果表明 ,由于氧化镁和氧化镍在 (2 2 0 )晶面发生晶格取代 ,增加了Ni2 + 的LUMO能量 ,使镍在FCC反应条件下更难被还原 ,有效地抑制了FCC催化剂上低价镍的脱氢生焦活性 ,从而达到钝镍的目的
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| 关 键 词： | 催化裂化 催化剂中毒 镍 镁 钝化 |
| 修稿时间： | 2001-03-16 |
DEVELOPMENT AND APPLICATION OF NON-TOXIC MPN NICKLE PASSIVATOR |
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| Ye Tianxu University of Petroleum. DEVELOPMENT AND APPLICATION OF NON-TOXIC MPN NICKLE PASSIVATOR[J]. Petroleum Refinery Engineering, 2001, 31(6): 27-29 |
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| Authors: | Ye Tianxu University of Petroleum |
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| Abstract: | The excellent effectiveness of the MPN nickel passivator has been demonstrated by the industrial application.When the mole ratio of Ni/Mg is 1,the yields of hydrogen and coke decrease by 39% and 12% respectively.The mechanism of nickel passivation was systematically investigated through MAT,TPR,XRD and quantitative calculations.The results showed that lattice substitution takes place between MgO and NiO after the addition of MPN to nickel deposited zeolite,this leads to increasing of the LUMO energy of Ni 2+ and then lowers the reducibility of nickel under the conditions of FCC reaction.Therefore,the dehydrogenation activity of nickle was inhibited. |
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| Keywords: | catalytic cracking catalyst poisoning nickel magnesium passivation |
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