Designed ultra microporous metal organic frameworks for selective co2 capture

Abstract

Carbon dioxide CO2 is a major heat trapping gas responsible for global warmingthrough the greenhouse effect Anthropogenic activities such as deforestation and burningfossil fuels account for large scale CO2 emissions along with some natural processes such asrespiration and volcanic eruptions According to the recent report 2017 from NASA theatmospheric CO2 concentration is already reaching alarming levels In fact the Mid Tropospheric CO2 concentration has gone up by 110 ppm from 365ppm to 475ppm sincelast one and half decade So there is a need for developing technologies to reduce theatmospheric CO2 concentration Also this can bring some economic benefits in coal basedpower production Carbon Capture and Storage CCS is the most promising technique forthis purpose Though the present industrial CO2 capture technology uses liquid amine basedsorbents adsorptive separation methods employing solid sorbents are realized to be the mostenergy efficient and thereby cost effective The large scale adsorptive separation of CO2 fromindustrial gas mixtures is achieved using zeolites activated carbons silica gels as sorbents With an ever growing demand for more energy saving and thereby cost effective andenvironmentally friendly procedures for gas separation new generation sorbents with betterefficiency are required Metal Organic Frameworks MOFs made up of metal ions metaloxoclusters connected via organic linkers have been recognized as well suited materials forthe application mentioned above During last decade several reports on gas separation usingboth Micro Ultra micro porous MOFs have appeared However MOFs with ultra micropores lt 6 197 seems to be the most potential candidate for the gas separation applications especially for carbon capture In this context we have developed few ultra microporousMOFs Um MOFs which display very interesting CO2 capture characteristics For example new newline newline