Zeolites, mainly consisting of silicon, aluminum, and oxygen atoms that connect in three-dimensional frameworks, are three-dimensional microporous or mesoporous materials. They are widely used in many applications, such as catalysts, catalyst supports, membranes, etc. In this book, the authors present current research in the study of the synthesis, chemistry and applications of zeolites. Topics include the conversion of ethanol to hydrocarbons over zeolite catalysts; air pollution catalytic control by metal promoted zeolites; zeolite from fly ash-iron oxide magnetic nanocomposites; application of zeolite containing rocks in berry crop growing; and dealuminated zeolites in biological systems.