Encapsulation of heavy metals on spent fluid catalytic cracking catalyst

被引：16
作者：
Sun, D
Li, XZ
Brungs, M
Trimm, D
机构：
[1] Nanyang Technol Univ, Environm Technol Inst, Innovat Ctr, Singapore 2263, Singapore
[2] Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong
[3] Univ New S Wales, Sch Chem Engn & Ind Chem, Sydney, NSW 2052, Australia
来源：
WATER SCIENCE AND TECHNOLOGY | 1998年 / 38卷 / 4-5期
关键词：
encapsulation; FCC; catalyst; treatment; stabilization; heavy metals;
D O I：
10.1016/S0273-1223(98)00530-7
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Vanadium and nickel were found as major contaminants an spent FCC catalyst at levels of 3518 ppm and 3225 ppm, respectively. XPS results indicated that vanadium and nickel were in oxide form on spent FCC catalysts. Leaching tests (TCLP) showed that vanadium from spent FCC catalysts poses an environmental problem if disposed by landfill. It was found that encapsulation treatment with up to 60 wt % spent FCC catalyst in Portland cement, is an effective means of stabilization. The strength of standard specimens containing catalyst was much lower than that of standard specimens made with same weight percentage of sand. (C) 1998 published by Elsevier Science Ltd. All rights reserved.
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页码：211 / 217
页数：7
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