Engineering Commons^™

Adsorption Processes For Co2 Capture: An Overview, Paul Webley, Ranjeet Singh, Penny Xiao

CO2 Summit III: Pathways to Carbon Capture, Utilization, and Storage Deployment

Adsorption processes for CO2 capture have gained significant attention in the last decade with hundreds of reports on new adsorbents and processes for capture and removal of carbon dioxide from a range of gas streams. To date, the only commercial examples are removal of trace carbon dioxide in gas streams such as LNG and ASU upstream molecular sieve units. There are no commercial examples of the use of adsorbents to capture carbon dioxide by adsorption processes and deliver a stream of high purity carbon dioxide for sequestration or further processing. In this study, we present the range of processing options …

A Membrane Approach To Co2 Capture, Richard W. Baker, Brice Freeman, Tim Merkel

CO2 Summit III: Pathways to Carbon Capture, Utilization, and Storage Deployment

For the past eight years, Membrane Technology and Research, Inc. (MTR) sponsored by the U.S. Department of Energy, has been developing membrane technology to capture CO2 from power plant flue gas. A 20 ton/day test system has been built and operated at two field sites. The technology is moving to the 200 ton/day (10 MWe) demonstration scale. A block diagram of the MTR process is shown in Figure 1. One innovation of this process is the use of a two-step membrane design where the second step uses a membrane operating with air sweep to selectively recycle CO2 to the boiler. …

Evaluation Of Physical Adsorbents For Post-Combustion Co2 Capture, Youssef Belmabkhout

CO2 Summit II: Technologies and Opportunities

CO₂ capture using physical adsorbents such as activated carbon, zeolites, and metal-organic frameworks (MOFs) have attracted a lot of attention because of the technical capability of adsorption technology using such separation agents to retrofit the energy demanding liquid amine scrubbing process. Nevertheless, this will be conceivable only if the separation agents (adsorbents) in question fulfil many unambiguous attributes in terms of porosity, CO₂ affinity, kinetics, energetics, stability, throughout the right capture mechanism, in addition to the adsorbents cost.

In this paper we report recent study about the evaluation of physical adsorbents for CO₂ capture from simulated flue …

Metallic Membranes For N2 Separation & Post-Combustion Co2 Capture Improvement, Simona Liguori, Kyoungjin Lee, Jennifer Wilcox

CO2 Summit II: Technologies and Opportunities

Carbon (CO₂) capture represents an important role in the reduction greenhouse gas emissions. Among various CO₂ capture technologies currently investigated, post-combustion capture allows for the retrofitting of existing plants and industrial units. Today, the amine scrubbing is considered the most competitive method for CO₂ removal in the flue gases from power plants in comparison to other technologies. Nevertheless, recent work has shown that the energy requirement for solvent recovery can decrease the overall efficiency of the power plants up to 16%¹. Moreover, additional costs may occur in the solvent absorption technology because of solvent …

Using Geologic Co2 Storage For Enhanced Geothermal Energy And Water Recovery And Energy Storage, Thomas Buscheck, Jeffrey Bielicki, Jimmy Randolph

CO2 Summit II: Technologies and Opportunities

Reductions in CO₂ emissions at a scale consistent with limiting the increase in the global average temperature to below 2oC above pre-industrial levels requires a range of measures, including increased use of renewable and low-carbon energy and reduced CO₂ intensity of fossil energy use, with each of these measures having major deployment barriers. The variability of the predominant renewable resources (wind and solar) requires major advances in utility-scale diurnal-to-seasonal energy storage. Base-load energy, such as nuclear, that cannot be cycled during periods of over-generation will have difficulty co-existing on electric grids with a large presence of variable renewables. …

Combined Magnesium Oxide/Water Gas Shift-Based Co2 Capture Process, Santosh Ganwal

CO2 Summit II: Technologies and Opportunities

Southern Research is developing a combined magnesium oxide (MgO) CO₂ sorbent/water gas shift (WGS)-catalyst-based CO₂ capture process for integrated gasification combined cycle (IGCC) power plants. A heat-exchanger reactor with a highly efficient heat management capability is being developed for simultaneous CO₂ capture and WGS to convert CO to CO₂ and H₂ and capture more than 90 % or more of the carbon from coal gasifier syngas. Simultaneous heat management and reaction allows the maintenance of thermodynamically favorable reaction temperatures for both steps. Also, by simultaneously converting the CO to CO₂ over the shift catalyst, …