Characterization of ceramic composite membrane filters for hot gas cleaning

摘要

Novel composite ceramic membrane filters suitable for hot gas cleaning operations have been prepared from fly ash and titania particles on stainless steel woven mesh substrates. Both membranes had a structure like a solid packed bed with a thickness of less than 100 μm. In the domain of laminar flow, significant differences in the pressure drop between experimental results and those predicted from the Kozeny- Carman relationship were found, particularly for flow through the titania membrane. Membrane filters with extremely small pores such as the Titania membrane are greatly affected by slip up to 80/100 in permeability at elevated temperatures.