J.L. Holm

Bio: J.L. Holm is an academic researcher from Norwegian University of Science and Technology. The author has contributed to research in topics: Mullite. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.

Modeling of mullite solid-solutions in the system Al2O3-SiO2

Abstract: A model for the mullite formation from kaolinites and the solid-solution range of mullite in the Al2O3-SiO2 system has been evaluated. This rather complicated model implies that both octahedral and tetrahedral coordinated Al3+-ions as well as tetrahedral Si4+-ions participate together with O2-ions and vacant oxygen positions during the rearrangements in the structure during the sintering process at high temperatures.

The influence of fly ash morphology and phase distr ibution on collection in an electrostatic precipitator

Abstract: Fly Ash is the unburnt portion of fuels which is ca rried away as solid particles in the hot gas stream of a furnace. About 99% of the fly ash produced in a typical coal-fired power station is removed by electrostatic precipit ators or baghouse filters located at the base of the emission stack. Precipitator efficiency is dependent on the chargi ng properties of the fly ash particles and the adhesive forces between t hem. These forces depend on the size, morphology, chemical constitution and phase distribution of the fly ash. Larger particles are usually found as aggregates held together by bridging material which may be small glassy particl es, graphite sheets, or a mixture of amorphous mate rial and small crystallites.