Effect of calcium magnesium acetate on the forming property and fractal dimension of sludge pore structure during combustion.
The changes in pore structure characteristics of sewage sludge particles under effect of calcium magnesium acetate (CMA) during combustion were investigated, the samples were characterized by N2 isothermal absorption method, and the data were used to analyze the fractal properties of the obtained samples. Results show that reaction time and the mole ratio of calcium to sulfur (Ca/S ratio) have notable impact on the pore structure and morphology of solid sample. The Brunauer-Emmett-Teller (BET) specific surface area (SBET) of sample increases with Ca/S ratio, while significant decreases with reaction time. The fractal dimension D has the similar trend with that of SBET, indicating that the surface roughness of sludge increases under the effect of CMA adding, resulting in improved the sludge combustion and the desulfurization process.
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China.
Lihui
L
Zhang
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China; School of Energy and Environment, Anhui University of Technology, Maanshan 243002, Anhui Province, China.
Feng
F
Duan
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China. Electronic address: heyyj@seu.edu.cn.
Yaji
Y
Huang
Department of Chemical Engineering, Chung Yuan Christian University, Chungli 32023, Taiwan.
Chiensong
C
Chyang
D000085:Acetates / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry*; D017709:Fractals; D017745:Incineration; D012722:Sewage / Q000737:chemistry*; D013499:Surface Properties; D014865:Waste Disposal, Fluid; D018508:Water Purification
D000085:Acetates; D017610:Calcium Compounds; D012722:Sewage
Calcium magnesium acetate; Combustion; Fractal; Pore structure; Sewage sludge