Zeolite and Zeolite Technology

Abstract

Zeolites are tetrahedrally connected framework solid based on silica and alumina. The structure possesses channels and cages which are large enough to contain extra-framework cations and to permit the adsorption and desorption of organic molecules varying size up to 1 nm. Their crystalline structure directly controls their properties such as acidity, selectivity, and stability and consequently their performance in applications such as ion exchange, separation, and catalysis. Zeolite catalysts have been brought to in industrial processes for economical and environmental benefits due to their properties such desired product selectivity and high thermal stability. More than 90 % of the industrial zeolites are applied in petrochemistry and refining industries. Due to the global energy and goods consumption has increased much more rapidly than in the previous decades, a strongly pressure for reducing the environmental impact has adopted more severe regulations for the production of waste and gas emission such as CO₂, SO_x and NO_x . In this article, the potential of zeolites in supporting the technology innovation especially in the environmental cleaner and renewable fuels is the most interesting.