Open AccessCARBON DIOXIDE CAPTURE FROM FLUE GAS USING DRY REGENERABLE SORBENTS
Author(s) -
David A. Green,
Brian Turk,
Raghubir Gupta,
Alejandro LópezOrtiz
Publication year - 2001
Language(s) - English
Resource type - Reports
DOI - 10.2172/804917
Subject(s) - sorption , calcination , thermogravimetric analysis , sorbent , flue gas , chemical engineering , carbon dioxide , sulfur dioxide , materials science , adsorption , waste management , chemistry , inorganic chemistry , organic chemistry , engineering , catalysis
Four grades of sodium bicarbonate and two grades of trona were characterized in terms of particle size distribution, surface area, pore size distribution, and attrition. Surface area and pore size distribution determinations were conducted after calcination of the materials. The sorbent materials were subjected to thermogravimetric testing to determine comparative rates and extent of calcination (in inert gas) and sorption (in a simulated coal combustion flue gas mixture). Selected materials were exposed to five calcination/sorption cycles and showed no decrease in either sorption capacity or sorption rate. Process simulations were conducted involving different heat recovery schemes. The process is thermodynamically feasible. The sodium-based materials appear to have suitable physical properties for use as regenerable sorbents and, based on thermogravimetric testing, are likely to have sorption and calcination rates that are rapid enough to be of interest in full-scale carbon sequestration processes