Present evidence is not sufficient for an evaluation of the hazard, if any, that might be caused by trace elements as a result of the increasing industrial market for coal. Measurements are reported for large pulverized fuel plant and small experimental, fluidized bed combustion rigs but there are hardly any data relating to industrial boilers. Present data are too inconsistent to permit generalized conclusions.
Methods of sampling, sample preparation and analysis are assessed and those most suitable for a comparison of emissions from fluidized bed and stoker fired boilers are indicated.
The effect of zinc oxide smoke additions on the dew‐point and sulphur trioxide content or an aerated coal‐gas flame containing sulphur dioxide has been studied. Measurements on filtered and unfiltered gases show that the presence of smoke tends, at first, to increase the amount of oxidation of dioxide to trioxide, but if sufficient smoke is present, the trioxide formed is absorbed and zinc sulphate is formed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.