The gasification of a metallurgical coke with CO2/N2 mixtures in a 0.1 m diameter fluidised bed has been studied over the temperature range 810–1050°C. The rate of gasification was found to be essentially kinetically controlled, with negligible influence of fluidisation parameters below 1000°C. A number of flow models were assessed. The plug flow model was found to be the simplest model which could predict the experimental results, giving similar results to the more complex two‐phase flow model of Davidson and Harrison (1963). For the range of conditions studied, the simple nth order reaction model was used to determine a best value of the reaction order of 0.8. For this combination of flow and reaction models, an activation energy of 197 kJ/mol was deduced from the experiments, in agreement with packed bed results and literature data. Very simple models can be used to predict the experimental results within the range studied.

Magnetic Particle Imaging (MPI) is a novel and emerging non-invasive technique that promises to deliver high quality images, no radiation, high depth penetration and nearly no background from tissues. Signal...

A range of 3-hydroxymethylindoles undergo acid-catalysed reactions involving ipso-electrophilic substitution with the extrusion of methanal and the formation of diindolylmethane moieties. Both inter-and intramolecular processes lead to macrocyclic compounds 10 and 14.