Packed-Bed Reactor Study of NETL Sample 196c for the Removal of Carbon Dioxide from Simulated Flue Gas Mixture

Hoffman, James S. ; Hammache, Sonia ; Gray, McMahan L. ; Fauth Daniel J. ; Pennline, Henry W.

关键词: ABSORPTION;    ADSORPTION ISOTHERMS;    AMINES;    CAPACITY;    CARBON DIOXIDE;    FLUE GAS;    MASS SPECTROSCOPY;    MIXTURES;    MOISTURE;    REGENERATION;    REGENERATORS;    REMOVAL;    SILICA;    STABILITY;    STEAM;    TESTING;   

DOI  :  10.2172/1044172
RP-ID  :  NETL-PUB-336
PID  :  OSTI ID: 1044172
Others  :  TRN: US201214%%647

学科分类：地球科学(综合)

美国|英语

来源: SciTech Connect

【 摘 要 】

An amine-based solid sorbent process to remove CO2 from flue gas has been investigated. The sorbent consists of polyethylenimine (PEI) immobilized onto silica (SiO2) support. Experiments were conducted in a packed-bed reactor and exit gas composition was monitored using mass spectrometry. The effects of feed gas composition (CO2 and H2O), temperature, and simulated steam regeneration were examined for both the silica support as well as the PEI-based sorbent. The artifact of the empty reactor was also quantified. Sorbent CO2 capacity loading was compared to thermogravimetric (TGA) results to further characterize adsorption isotherms and better define CO2 working capacity. Sorbent stability was monitored by periodically repeating baseline conditions throughout the parametric testing and replacing with fresh sorbent as needed. The concept of the Basic Immobilized Amine Sorbent (BIAS) Process using this sorbent within a system where sorbent continuously flows between the absorber and regenerator was introduced. The basic tenet is to manipulate or control the level of moisture on the sorbent as it travels around the sorbent circulation path between absorption and regeneration stages to minimize its effect on regeneration heat duty.