Cyclic Stability Testing of Aminated‐Silica Solid Sorbent for Post‐Combustion CO₂ Capture

Abstract

The National Energy Technology Laboratory (NETL) is examining the use of solid sorbents for CO2 removal from coal-fired power plant flue gas streams. An aminated sorbent (previously reported by the NETL) is tested for stability by cyclic exposure to simulated flue gas and subsequent regeneration for 100 cycles. Each cycle was quantified using a traced gas in the simulated flue gas monitored by a mass spectrometer, which allowed for rapid determination of the capacity.

One‐Pot Synthesis of a 1,2‐Diphospholide by Double C–H Deprotonation

“…This stability is ascribed to hydrogen bonding among NH 2 /NH groups of multiple long‐chain PEI molecules, and between PEI amine and silica hydroxyl groups. Incorporating TMPED along with the PEI into the BIAS sorbents introduces hydrophobic SiOSi cross‐links and potentially unhydrolyzed trimethoxysily groups that could inhibit the disruption of (stabilize) amine/aminosilane and amine/aminosilane/silica interactions by H 2 O. TMPED was used in previous studies to facilitate sorbent cycling stability 12c…”

Pelletization of Immobilized Amine Carbon Dioxide Sorbents with Fly Ash and Poly(vinyl chloride)

“…Immobilized amine particle sorbents and their associated processes are among the most widely studied methods to mitigate postcombustion CO 2 emissions . Advancements in reactor design from batch, fixed‐bed systems to continuous circulating fluidized‐bed,,, rotating‐disk, and moving‐bed systems and the development of steam‐stable sorbents under practical conditions are promising milestones towards commercialization. However, difficulties are inherent in the application of small‐particle‐size sorbents to industry‐scale processes.…”

Robust Immobilized Amine CO2 Sorbent Pellets Utilizing a Poly(Chloroprene) Polymer Binder and Fly Ash Additive

“…5 vol % steam‐treatment. Excellent agreement between the fresh CO 2 capture of the pellets as determined by the CO 2 mass spectrometry (MS) profiles (1.74 mmol CO 2 g −1 ) and by the TGA single‐cycle weight change method (1.78 mmol CO 2 g −1 ) further highlights the reliability of calculating CO 2 capture capacity from effluent CO 2 concentration profiles . Analysis of (a) the MS CO 2 profiles and (b) adsorbed CO 2 profiles for dry cycle 2 (fresh) and dry cycle 4 (steam‐treated), plotted in Figure , provide further insight into the minimal effect of steam on pellet performance.…”