The provided text describes a monograph that unifies the theoretical and practical aspects of adsorption and absorption processes. It covers modern theoretical foundations, analytical methods, capillary condensation, physical adsorption theories, and methods for determining the differential heat of adsorption in multilayer adsorption contexts. The monograph details how to use adsorption isotherms and experimental data to evaluate porous materials and process results, outlining methods for determining properties such as specific surface area, total pore volume, and pore size distribution . Practical instructions are included for composite absorbents used in removing sulfur compounds from natural gas, detailing their synthesis and industrial applications. The work bridges theory and practice for researchers, engineers, and students by integrating theoretical foundations, computational tools, and practical solutions for understanding and applying sorption processes.