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1.3 Problem Statement and Scope of Work data source, since they govern the performance of an adsorptive process and are vital for process design. Basic understanding of multicomponent gas-solid interactions is often very limited, especially for the heterogeneous adsorbents used in practice [169, 170]. An accurate knowledge of these interactions under all conditions of pressure, temperature, and gas compositions, which can vary widely in a practical PSA process, is needed for a reliable solution of the process models. In particular, there is a strong need to generate and compile a multicomponent adsorption database which can validate adsorption models used for PSA process design, and can compute aforementioned core properties. Although such databases exist [188, 105], they are quite old, not exhaustive and do not account for newly developed adsorbents for existing and emerging applications. 1.2.4 Adsorbent Materials Synthesizing novel high-performance adsorbents presents research challenges of its own. Ad- sorbents are desired to provide large specific surface area for a large adsorption capacity, and to be selective enough to retain one or more components from the gaseous feed mixture. Be- ginning with amorphous adsorbents like silica gel and activated carbon, the range of industrial adsorbents have grown to include synthetic molecular sieves and next generation zeolites with symmetric and crystalline pore structures [155, 156]. The challenge is to synthesize significantly heterogeneous adsorbents which can provide substantially high selectivity for high-purity pro- duction, and to develop methods for quantitative characterization of adsorbent heterogeneity. 1.3 Problem Statement and Scope of Work In this work, we address the challenges related to systematic PSA process synthesis, and devel- oping computationally cheap strategies for simulation and optimization of PSA bed models, as listed in sections 1.2.1 and 1.2.2, respectively. Development of new adsorbent materials, models that compute adsorbent properties, and multicomponent adsorption database is beyond the scope of this work. Chapter 1. Introduction 7PDF Image | Design and Operation of Pressure Swing Adsorption Processes
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