Hybrid Membrane-Vacuum Swing Adsorption Feasibility for Cement Production Post-Combustion Carbon Capture
Natalie Kapfenstein, Elias Nino, Nghi Ly, and Teddy Aboye
Advisor: Robert Cormia (Foothill College)
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This project investigates the design and implementation of a hybrid Vacuum Swing Adsorption (VSA)-membrane system for post-combustion carbon capture, specifically targeting emissions from cement plants. The goal is to develop a scalable, energy-efficient, and economically viable technology capable of capturing 90% of CO₂ emissions from industrial flue gas streams. The study began with a comprehensive literature review to identify effective CO₂ separation technologies, focusing on membrane and adsorption systems. Following this, a process flow diagram (PFD) and material and energy balances were developed based on a feed stream of 330,000 m³/h with 17.8% CO₂. Experimental and theoretical data informed the selection of zeolite 13X as the adsorbent and Teflon AF 2400 for membrane material. Results demonstrate a two-stage purification process yielding a final CO₂ purity of 86% with high recovery. The third phase included a Piping and Instrumentation Diagram (P&ID), piping material schedule, and an environmental audit. The process adheres to California emission standards, incorporating engineering controls and safety protocols to mitigate environmental and operational risks. Lastly, a economic analysis was performed to assess the financial viability of the process as a whole, including capital and operating costs, as well as a profitability analysis, accounting for all factors, such as carbon credits. Overall, the system presents a unique approach to reduce industrial carbon emissions, balancing technological feasibility with economic and regulatory considerations.
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