Adsorption of toxic gases from gasification process by polyHIPEs

Abstract

Poly(DVB)HIPEs prepared with a porogenic solvent (toluene) and 2 types of mixed surfactants (SPAN80, DDBSS, and CTAB; 6.3, 0.4, and 0.3 wt% (S80DCI) and 9.5, 0.3 and 0.2 wt% (S80DCII)). The producing poly(DVB)HIPEs exhibit surface areas up to 550 m²/g. Due to their poor mechanical properties, 1, 3, 5, 10 and 15 wt% of acid-treated clay were added into the monomer phase of poly(DVB)HIPE to improve the mechanical properties and increase the adsorptive capacity of resulting materials. The resulting materials were characterized by SEM, N₂ adsorption-desorption, TG/DTA, and compression test. Surface areas of S80DCI decreased froom 550 to 251 m²/g. The compressive modulus of the obtained poly(DVB)HIPEs INCREASED FROM 2.59 to 3.50 MP with 0 to 5 wt% acid-treated clay content, and decreased to 2.07 MPa when the acid-treated clay content was 15 wt% Surface areas of S80DCII with 0 to 10 wt% added acid-treated clay increased from 198 to 523 m²/g. The compressive modulus increased from 2.61 to 3.00 MPa with 0 to 5 wt% acid-treated clay content. The surface area and compressive modulus were decreased to 346 m²/g and 1.99 MPa, respectively, when the amount of added acid-treated clay content was 15 wt% CO₂ adsorption tests were carried out on the obtained poly(DVB)HIPE and it was found that CO₂ adsorption was between 2.43 and 18.2 mmol/g. The highest adsorption was obtained from S80DCI with 1 wt% acid-treated clay.