کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
238889 465781 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improving the dewetability characteristics of hydrophobic fine particles by air bubble entrapments
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Improving the dewetability characteristics of hydrophobic fine particles by air bubble entrapments
چکیده انگلیسی

The present study deals with the role of surface hydrophobicity and air bubble entrapment on filtration / dewatering of fine coal particles (− 0.5 mm). The experimental results showed that hydrophobizing reagents increased the contact angle (or hydrophobicity) and decreased the filtrate surface tension, cake formation time and moisture content of the fine particles. In addition to these, when the air bubbles were introduced to the hydrophobic fine coal particles in water, the cake formation time and moisture content of the filter cake were further reduced, which may be attributed to the fact that micro/nano size air bubbles were entrapped on the surface of the fine particles in a slurry and increased the dewetting characteristics of the fine particles. As a result, this process may lower the amount of moisture trapped during the dewatering fine particles and increase the efficiency of the filters.

Graphical AbstractThe present study deals with the surface hydrophobicity and air bubble entrapment on filtration/dewatering of fine particles. The experimental results confirmed that surfactants increased the contact angle and decreased the filtrate surface tension, cake formation time and moisture content of the fine particles. Also, as the bubbles were introduced to the hydrophobic surface in a liquid media, the cake formation time and moisture content of the filter cake were further reduced.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 186, Issue 2, 11 August 2008, Pages 184–188
نویسندگان
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