Pore structure and fractal analysis for char of sludge blended with calcium magnesium acetate during pyrolysis process

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• 作者：Lihui Zhang ; Yaji Huang and Feng Duan
• 刊名：Asia-Pacific Journal of Chemical Engineering
• 出版年：2016
• 出版时间：September/October 2016
• 年：2016
• 卷：11
• 期：5
• 页码：705-713
• 全文大小：968K
• ISSN：1932-2143

文摘

The changes in pore structure characteristics of sewage sludge blended with calcium magnesium acetate (CMA) during pyrolysis process were investigated. Sludge and its blended fuel with CMA were characterized by N₂ isothermal absorption method, and the data were used to analyze the fractal properties of the obtained samples. Results show that pyrolysis temperature has notable impact on the pore structure and morphology of both samples. The Brunauer–Emmett–Teller (BET) specific surface area (S_BET) of both samples increases greatly as the temperature increases from 400 to 600 °C, and these values decrease little at higher temperature. Average pore diameter of both samples shows the inverse trends with those of BET specific surface area. Pore structure and surface morphology are both developed at lower temperature range leading to the increase of fractal dimensions (D₁ and D₂), indicating an increase in the surface and space roughness of samples.