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The microstructure of the surface of a calcined limestone particle is multi-fractal. We develop an analytic method that surveys the boundary curve multi-fractal dimensions with SEM, gets a three-dimensional surface structure α−f(α) curve via zero-sets, and finally calculates the multi-fractal spectrum values of the particle surface's microstructural topography. After analyzing two spectra from limestone...
To provide a tool for performance evaluation of aggregating occurrences afterwards-pertaining to the desulferized limestone's calcination, we propose a threedimensional particle adhesive model repose on dynamic optimization of Monte Carlo. Based there on, we firstly develop a computer simulation on the formation mechanism of the microstructure of calcinated limestone. Then, sensitive observations...
Limestone is usually be used as a sorbent for capture of sulphur dioxide, but, almost half of CaO will not reacted with SO2 in FBC. So, when the fly ash that contains CaO cools to bellow the calcination temperature, carbonation of CaO in fly ash that deposited on cool surfaces may occur. In this study, CaO was carbonated in a TGA under conditions expected in FBC. The temperature range investigated...
The carbonation of CaO calcined from a chemical pure CaCO3 in oxy-fuel combustion condition was investigated in a thermo gravimetric analyzer. The influence of temperature and CO2 concentrations on the carbonation of CaO were investigated. It was found that temperature is very important for CaO carbonation reaction. At the range of tested temperatures, higher temperature can accelerate the carbonation...
The desulphurization reaction of porous CaO is a complex multi-model control process. It can be seen through SEM that, the calcination limestone is consisted of many CaO aggregation particles, the particle is consisted of a large mount of grains, and there are a lot of pores within those individual particles. Therefore, the product layer diffusion process is made up of two processes, one is gas diffusion...
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