Modern Chemistry & Applications

Carbon dioxide capture and catalytic conversion to added value products through the use of different alkaline ceramics

Joint Event on 19^th International Conference on Medicinal Chemistry & Multi Targeted Drug Delivery & International Conference on Catalysis and Pyrolysis

November 05-06, 2018 | San Francisco, USA

Heriberto Pfeiffer

National Autonomous University of Mexico, Mexico

Scientific Tracks Abstracts: Mod Chem Appl

Abstract:

In the last two decades, alkaline ceramics have been analyzed as possible high-temperature CO2 captors. The most studied ceramics are the lithium orthosilicate, lithium aluminate, lithium and sodium zirconates and lithium cuprate, among others. These ceramics are able to trap CO2, chemically, at different temperature ranges (30-820�C) under different physicochemical conditions. These ceramics trap CO2 throughout a chemisorption process. Initially, alkaline ceramic particles react with CO2 at the surface. This superficial reaction implies the formation of an external shell (alkaline carbonate and secondary phases). Once the external shell is produced, the reaction mechanism is controlled by diffusion processes. Therefore, the correct understanding of all these phenomena is very important during the selection of ideal CO2 capture conditions. Conversely, the same alkaline ceramics have been tested in different catalytic reactions, where carbon dioxide (CO2) and/or methane (CH4) are used. Some of these reactions are methane reforming (called dry reforming) and water gas shift. These reactions produce syngas (CO+H2), which can be used in different energetic and organic applications. Additionally, these reactions are also environmentally important, as CO2 and CH4 (perhaps the two most important greenhouse gases) are catalytically converted into added value products, such as hydrocarbons and oxygenated compounds. Finally, some of these lithium and sodium ceramics have been tested as possible bifunctional materials for CO oxidation and subsequent CO2 chemisorption. This process would be used in hydrogen enrichment from syngas mixture. Therefore, the aim of this presentation is to show some recent advances in CO2 capture on lithium and sodium ceramics (under different physicochemical conditions) and to show as well how CO2 chemically trapped can be catalyzed to added value products through the syngas production at different temperature ranges and the use of these ceramics as bifunctional materials for CO oxidation and subsequent CO2 chemisorption processes.

Biography :

Heriberto Pfeiffer was born in Mexico in 1971. He completed a BSc in Chemistry at Universidad de Guanajuato in 1995. Then, in 1997 and 2001 he obtained a Masters and PhD degrees in Chemistry at Metropolitan Autonomous University. He had two different Postdoctoral positions at the University of Cambridge and Polytechnic School of the University of Nantes. In 2005 he got a permanent position at the Institute of Materials Research, National Autonomous University of Mexico, where he has been working. His research interests are related to different sorption and catalytic processes for energetic and environmental applications, such as CO2 capture and its possible conversion to added value products; different catalytic processes (reforming of organic molecules, CO oxidation-chemisorption process as a possible syngas separation, NOx reduction and H2 production). Additionally, he is interested in high-temperature dense membranes for CO2 separation and biodiesel production using different basic heterogeneous catalysts.

E-mail: pfeiffer@iim.unam.mx