Membrane reactors are increasingly replacing conventional separation, process, and conversion technologies in a wide range of applications. Exploiting advanced membrane materials, they offer enhanced efficiency, are adaptable and have great economic potential. Therefore, there is increasing interest in them from the scientific and industrial communities, stimulating research and development. The two volumes of the Handbook of Membrane Reactors draw on this research for an authoritative review of this important field. Volume 1 explores fundamental materials science, design, and optimization, beginning with a review of polymeric, dense metallic, and composite membranes for membrane reactors. Polymeric and nanocomposite membranes for membrane reactors, inorganic membrane reactors for hydrogen production, palladium-based composite membranes, and alternatives to palladium-based membranes for hydrogen separation in membrane reactors are discussed. Part Two investigates zeolite, ceramic and carbon membranes, and catalysts for membrane reactors in more depth. Part three explores membrane reactor modelling, simulation and optimization, including the use of mathematical modelling, computational fluid dynamics, artificial neural networks, and non-equilibrium thermodynamics to analyze varied aspects of membrane reactor design and production enhancement. The two volumes of the Handbook of Membrane Reactors are an authoritative guide for membrane reactor researchers and materials scientists, chemical and biochemical manufacturers, industrial separations and process engineers, and academics.