Description: Human exploration of Mars, as well as unmanned sample return missions can benefit greatly from use of propellants and life-support consumables produced from the resources available on Mars. The first major step of any in-situ propellant production system is the acquisition of carbon dioxide from the Mars atmosphere and its compression for further chemical processing. TDA Research Inc. proposes to develop a compact, lightweight, advanced sorbent-based compressor to recover high-pressure, high purity CO2 from the Martian atmosphere. The system eliminates the need for a mechanical pump, increasing the reliability with relatively low power consumption. TDA's system uses a proprietary sorbent that selectively adsorb CO2 at 0.1 psia and regenerates by temperature swing, producing a continuous, high purity CO2 flow at pressure (> 15 psia). The objective of this Phase I research is to develop a high capacity, regenerable CO2 adsorbent that maintains its CO2 capacity and mechanical integrity over extended adsorption/desorption cycles. We will optimize the sorbent formulation and conduct a minimum of 100 complete adsorption/regeneration cycles for our best sorbent formulation. We will carry out a design of the adsorbent-based CO2 compressor and demonstrate the technical feasibility of the concept and quantify the logistics savings.

Benefits: The main attraction of our research to NASA is its ability to provide a lightweight, compact and energy efficient adsorbent based solid-state CO2 compressor system to collect and pressurize CO2 from the Martian atmosphere. The sorbent developed will also find application in CO2 control system for commercial space craft cabin air revitalization and space suits.

The sorbent developed in this project could potentially find use in a large commercial market in the removal of CO2 emissions from the coal-fired power plants. If regulations are put in place this market could develop in to billions of dollar. It is also applicable to CO2 removal from biogas, natural gas, and the water-gas-shift reaction in hydrogen manufacturing.