کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
233755 | 465362 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pre-ignition behavior of lead sulfide in the flame of a flash smelter
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
At less than 650 °C, the oxidation of lead sulfide (PbS) with oxygen to produce lead sulfate (PbSO4) was found to have a very low activation energy of 10 kJ/mole, a reaction order with respect to oxygen of ∼0.5, and one with respect to sulfur dioxide of 0, though the presence of sulfur dioxide was necessary to sustain the reaction. These kinetic parameters suggest that the rate-limiting step was initially oxygen adsorption, very quickly supplanted by slow intraparticle diffusion of sulfur and lead ions.
► Oxygen adsorption and intraparticle diffusion of sulfur and lead were the rate-limiting steps in the oxidation of lead sulfide at temperatures less than 650 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Minerals Engineering - Volume 24, Issue 8, July 2011, Pages 845–851
Journal: Minerals Engineering - Volume 24, Issue 8, July 2011, Pages 845–851
نویسندگان
J. Pierre Constantineau, Sylvie C. Bouffard, John R. Grace, Greg G. Richards,