Confined Coaxial Powder Extrusion

Project Overview

The ability to easily and cheaply transport carbon dioxide (CO2) from point-sources, such as power plants, to multiple potentially distant utilization sites of varying scales will enable wider utilization of captured CO2. Lawrence Livermore National Laboratory (LLNL) has developed carbonate-based composite sorbents capable of capturing, storing, transporting, and delivering CO2 to point of use sites. The objective of this project is to develop a Confined Coaxial Powder Extrusion (CCAPE) to increase the carbonate loading within LLNL's CO2 sorbent materials, as much as doubling the CO2 loading capacity. In this project, we developed multiple sizes of coaxial nozzles, demonstrated extrusion of a sodium bicarbonate powder core within a silicone shell, and explored the effect of the core-to-shell thickness ratio to validate an improvement in CO2 loading capacity relative to the current sorbent material.

Mission Impact

This feasibility study fits within the Director's Initiative for Engineering the Carbon Economy by advancing capabilities for carbon capture material development. CCAPE is critical for the development of structured supports for advanced sorbents such as Metal-organic Frameworks (MOFs), allowing LLNL to have a greater presence in the direct air capture (DAC) field and form strategic partnerships necessary for external funding opportunities within this space. This work builds upon the Advanced Materials and Manufacturing Core Competency by furthering LLNL's multidisciplinary approach to developing innovative and tailored materials, structures, and advanced manufacturing methods.

Publications, Presentations, and Patents

Cerón, M. R. J.M. Knipe, D.T. Nguyen, A.E.L. Overland M.J. Troksa, V.H. Eshelman, J.R. DeOtte. ROI. "Confined Coaxial Powder Extrusion (CCAPE)." ROI IL-13750