Multi-metal oxide aerogel for capture of pollution gases from air

✍ Scribed by M.S. Ahmed; Y.A. Attia

• Book ID: 104395582
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 378 KB
• Volume: 18
• Category: Article
• ISSN: 1359-4311
• DOI: 10.1016/s1359-4311(97)00104-x

✦ Synopsis

Utilization of fossil fuels results in the emission of pollution gases such as CO 2 , SO 2 , CO, NO x and H 2 S. Currently available commercial technologies for reducing SO 2 and NO x emissions from power plants are costly and produce hazardous wastes. The concept described in this paper uses advanced aerogel materials containing components such as CaO and MgO in their structure to capture/adsorb gaseous wastes from fossil fuel combustion. Aerogels are typically highly porous materials, which can have over 90% porosity, very low density, and extremely high surface area (several hundred m 2 /g). The test results of this work indicated that an aerogel sorbent containing CaO, MgO and SiO 2 , which is prepared in the laboratory `by the advanced sol-gel technology', can be used eciently to capture/ adsorb pollution gases such as CO 2 , SO 2 , NO x , CO and H 2 S through both physical and chemical sorption mechanisms. Aerogels can be engineered to dierent forms, sizes, and chemical compositions to be used as gas ®lters in the dierent workplaces and indoor living spaces.