کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
580222 | 1453144 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Processing of spent platinum-based catalysts via fusion with potassium hydrogenosulfate
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
This work describes a route for processing spent platinum-based commercial catalysts (Pt and PtSnIn/Al2O3) via fusion with potassium hydrogenosulfate (KHSO4). Samples were previously ground. The optimized experimental parameters were: temperature, 450 °C; time, 3 h; sample/flux mass ratio, 1/10. The fused mass was dissolved in water and the elements present were isolated by a multi-step separation procedure. Platinum was recovered as the only water-insoluble residue. About 45 wt% of aluminium was recovered as KAl(SO4)2·12H2O (alum), whereas the remaining element was recovered as Al(OH)3. Tin and indium were recovered together as sulfides at pH 1. About 72 wt% of potassium was recovered as K2SO4 when the final effluent was treated with sulfuric acid (pH 1) and slowly evaporated. Generation of final wastes was greatly reduced. More than 98 wt% of the elements present in the catalysts examined was recovered.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 184, Issues 1â3, 15 December 2010, Pages 717-723
Journal: Journal of Hazardous Materials - Volume 184, Issues 1â3, 15 December 2010, Pages 717-723
نویسندگان
Sebastião Guedes Júnior, Júlio Carlos Afonso,