Preparation and Characterization of Chromium Metal Organic Framework for Carbon Dioxide Adsorption

Abstract

Air pollution is a widely discussed topic in both academic and industry sectors, especially in the developing countries. According to the risk assessment report from the Global Burden of Disease Study conducted in 2010, air pollution had caused 6.85 million deaths globally and out of 4.3 million from these numbers is attributed by the indoor air pollution. Government regulatory bodies in most of the countries impose strict regulatory on the CO2 limit in the indoor air condition. CO2 is captured by several methods such as solvent adsorption, physical adsorption, cryogenic fractionation and membrane system. Recently, metal organic frameworks (MOF) such as MIL-100(Cr) have been identified as attractive material for CO2 adsorption as it requires low energy consumption and relatively moderate production volume, if compared to the conventional gas adsorption techniques. These advantages have spurred much interest from industries and academics to speed up the commercial viability of the CO2adsorption by MOF. In this work, the effect of metal oxide loading on the CO2 absorption by chromium (III) chloride hexahydrate and trimesic acid were investigate. The fabricated MOF were characterized using scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) to observe its surface morphology and composition. The SEM morphology suggested that Cr-TA-3 possesses highest surface area to volume ratio attributed to the formation of agglomerate of crystal rod structure. In this paper, CO2 gas adsorption was carried bythemogravimetricanalyzer (TGA). The gas adsorption result indicated Cr-TA-3 recorded the highest CO2 adsorption at 0.038 mmol/g. The results obtained from this study suggested that MOF fabricated by chromium (III) chloride hexahydrate and trimesic acid possesses the potential to be applied in CO2 absorption.