NICKEL AND VANADIUM ON EQUILIBRIUM CRACKING CATALYSTS BY IMAGING SECONDARY ION MASS-SPECTROMETRY
NICKEL AND VANADIUM ON EQUILIBRIUM CRACKING CATALYSTS BY IMAGING SECONDARY ION MASS-SPECTROMETRY
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DOI：
10.1016/0021-9517(88)90221-7
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发表时间：
1988-02-01
影响因子：
7.3
通讯作者：
LETA, DP
中科院分区：
文献类型：
--
作者：
KUGLER, EL;LETA, DP
在几种流化催化裂化催化剂的精炼厂样品上测定了镍和钒的分布。成像二次离子质谱分析的数据表明，催化裂化原料中的金属最初沉积在催化剂颗粒的外表面附近。镍留在沉积的地方，而钒显示出颗粒内和颗粒间的流动性。钒在催化剂颗粒中富集，但在复合催化剂中表现出对稀土交换y -沸石相和氧化铝相的偏爱。相反，镍对催化剂相没有偏好，并随时间单调累积。沉积镍中缺乏流动性使其成为确定单个颗粒年龄的好方法。
The distribution of nickel and vanadium has been determined on refinery samples of several types of fluidized catalytic cracking catalyst. Data from imaging secondary ion mass spectrometry show that metals in catalytic cracking feedstocks initially deposit near the external surface of catalyst particles. Nickel remains in the area where it was deposited, while vanadium shows both intraparticle and interparticle mobility. Vanadium accumulates throughout catalyst particles, but shows a preference for both rare earth exchanged Y-zeolite and alumina phases in composite catalyst. By contrast, nickel shows no preference for catalyst phases and accumulates monotonically with time. The lack of mobility in deposited nickel makes it a good measure to determine the age of individual particles.