Sulfur Capture during Fluidized Bed Combustion of Coal. External Mass Transfer Phenomena and the Fluid-Dynamical Behaviour of Large Particles

摘要

Fluidized Bed Combustion (FBC) is an attractive technique for the production of useful energy from polluting and/or low value fuels because it allows for in-situ sulfur capture by addition of sorbent materials to the bed. The purpose of the thesis is to obtain a basic understanding of those processes that determine the sulfur capture, as an essential step forward from empirical correlations and large computer models based on uncertain assumptions. A large amount of experiments has been carried out to study the fluid-dynamic properties of mixtures of large particles (Ch.V to VII). Data on particle mixing and segregation in fluidized beds of various sizes both at ambient and at FBC temperature (850 deg C) have been collected. The results are used to support the assumptions for the fluidized bed models that appear in the thesis. (Copyright (c) 1985, I.W. Noordergraaf, Breukelen, the Netherlands.)