(630t) High Performance CO2 Adsorbents for Sorption-Enhanced Water Gas Shift Reaction (SEWGS) In Coal Gasification Systems

The
University of
Illinois at Urbana-Champaign and URS Group,
Inc. are developing a dry sorbent technology that combines the water-gas-shift
(WGS) reaction with CO₂ removal for coal gasification systems. The
result will be a sorption-enhanced water-gas shift (SEWGS) technology. The key to
the success of the SEWGS technology is to identify and develop highly
efficient, highly stable sorbents with properties suitable for CO₂
capture at high pressure and high temperature syngas
conditions. An ideal SEWGS sorbent will improve WGS efficiency, achieve high capacity
of CO₂ adsorption at high temperature, be regenerated at high
pressure, and maintain high multi-cycle stability.

Our
previous thermodynamic modeling and process simulation studies identified seven
sorbent candidates that possess properties desirable for SEWGS application. The
current work is focused on synthesis research of these sorbent candidates using
a flame spray pyrolysis (FSP) approach. Adsorption and regeneration behaviors of
FSP sorbents are evaluated using TGA and several sorbents demonstrated high CO₂
adsorption performance (capacity and kinetics) at temperatures ranging between
400 and 700 °C and good multi-cycle stability. This presentation will provide a
summary of the sorbent synthesis and evaluation research.