摘要
为了确定催化裂化废催化剂上镍的存在形态,采用紫外可见光谱方法对含有镍的氧化硅、氧化铝载体、5个催化裂化新鲜剂和10个催化裂化平衡剂进行表征。结果表明:NiO与氧化硅或氧化铝机械混合样品中Ni质量分数高于519μg/g或694μg/g时即可检测到NiO;氧化硅载体在较低的镍污染量下即可检测出NiO,但氧化铝载体在镍污染量低于117 900μg?/g时无法检测出NiO,且当氧化铝载体污染镍质量分数高于3 465μg/g时,可以检测到新物质生成;不同类型的催化裂化新鲜剂在污染Ni质量分数高达15 000μg/g时仍无法检出NiO;对Ni质量分数在0.07%~2.50%范围内的典型催化裂化平衡剂均未检测到NiO的存在。
The mechanical mixtures of silica or alumina with NiO, impregnated silica or alumina with Ni sources, together with 5 fresh FCC catalysts and 10 commercial FCC equilibrium catalysts（ECAT）were characterized by UV-Vis spectrum to investigate the nickel species on FCC catalyst. The results show that for the samples of NiO mechanically mixed with silica or alumina, NiO was reliably detected when Ni content is higher than 519μg/g or 694 g g/g,respectively. Compared with the impregnated alumina, NiO can be detected at low Ni con- tamination content on the impregnated SiO2. As to the alumina impregnated, NiO cannot be detected until the Ni contamination content is over 117 900 μg/g. New species are found when the Ni content is higher than 3 465 gg/g on the Ni impregnated alumina. No NiO can be observed until the Ni content is higher than 15 000 gg/g and 0.07%-2. 50 % for fresh FCC catalysts and ECATs ,respectively.
作者
沙昊
任飞
朱玉霞
Sha Hao Ren Fei Zhu Yuxia(SINOPEC Research Institute of Petroleum Processing, Beijing 100083)
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2017年第8期46-50,共5页
Petroleum Processing and Petrochemicals
基金
中国石油化工股份有限公司合同项目(CLY15076)
关键词
催化裂化
废催化剂
NiO镍形态
紫外可见光谱
catalytic cracking
spent FCC catalyst
NiO
nickel species
UV-Vis spectrum
