Cafer T Yavuz

High-pressure CO2 Adsorption on Conventional Hydroxyl Metal Carbonates

Abstract Carbon dioxide (CO2) adsorption capacities of several hydroxy metal carbonates have been studied using the state-of-the-art RubothermR Sorption apparatus to obtain adsorption and desorption isotherms of these compounds up to 175 bar. The carbonate compounds were prepared by simply reacting a carbonate (CO32−) solution with solutions of Zn2+, Zn2+/Mg2+, Mg2+, Cu2+/Mg2+, Cu2+, Pb2+, and Ni2+ metal ions resulting in hydroxyzincite, hydromagnesite, mcguinnessite, malachite, nullaginite, and hydrocerussite, respectively. Mineral compositions are calculated by using a combination of powder XRD, TGA, FTIR, and ICP-OES analysis. Adsorption capacity of hydroxy nickel carbonate compound obtained from RubothermR Magnetic Suspension Sorption apparatus has shown highest performance among the other components that were investigated in this work (1.72 mmole CO2/gram adsorbent at 175 bar and 316 K).

Preparation, characterization and investigation of CO2 adsorption behavior of zinc-magnesium carbonate compounds

AbstractThe capture of CO2 from flue gases derived from fossil fuelled power plants and the absorption of CO2 from natural gas sweetening processes are two relevant industrial problems closely related with very important environmental, economical and technological problems that need to be solved. Porous inorganic compounds have received attention in recent years due to their possible applications in the carbon dioxide capture and storage field. In this work, we prepared new metal carbonates by reacting CO32- solution with solutions of Zn2+-Mg2+ metal ions in different stoichiometric ratios. The samples were characterized with powder x-ray diffraction analysis (PXRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). Furthermore, these samples were measured with a Rubotherm magnetic suspension balance to investigate their CO2 adsorption behavior and performance.