Sub-nano ceramic membranes are ceramic separation membranes (ceramic filters) that feature especially fine sub-nano* class pores. They are capable of separation at the molecular level – for example, separating nitrogen from a mixed gas of methane (CH4) and nitrogen (N2).

NGK has developed various sub-nano ceramic membranes capable of separating specific gases or liquids from gas-liquid mixtures. These products are instrumental to establishing innovative separation processes that dramatically reduce both costs and energy consumption.