Product layer diffusion in the sulphation of calcium carbonate

  title={Product layer diffusion in the sulphation of calcium carbonate},
  author={Kristiina Iisa and Mikko Hupa and Patrik Yrjas},
In pressurised fluidised bed combustion, sulphur dioxide is bound directly to uncalcined limestone. Diffusion through the calcium sulphate product layer has been found to be important in limiting the sulphation rate. The product layer diffusion controlled regime of the sulphation was studied in a pressurised thermogravimetric apparatus. The apparent activation energy of the product layer diffusion has been earlier reported to be high, of the order of 100–200 kJ/mol. The purpose of the work was… CONTINUE READING