Crafting pore architecture of water stable microporous mofs for selective co2 capture

Abstract

The sky rocketing rise of global CO2 concentration is one of the major environmental concerns today because of its detrimental effects on climate change species extinction and plant nutrition Therefore cutting CO2 emissions is among the prime targets of the coming decades CO2 is mainly emitted from the combustion of fossil fuels by industries and transport systems Our daily lifestyles are almost entirely dependent on the power generated from fossil fuels and will also be so for the upcoming few decades Consequently the only technique to allow continued use of fossil fuels while minimizing CO2 footprint is Carbon Capture separation and Storage CCS technology As CCS technology solid sorbents get priority over the industrially accessible liquid amine sorbents because of their lower regeneration costs and environment and plant affability Apart from the engineering modifications the performance of the CCS technology relies to a large extent on the sorbent capacity Hence finding suitable cheap designer crystalline porous material is highly needful for carbon capture technology Metal Organic Frameworks MOFs form a class of crystalline porous material made of metal nodes connected via organic linkers and have tuneable architectures and fuctionalizable pores MOF can display excellent low energy physisorption based gas capture capabilities Most industrial and power plant flue gas emissions contain substantial humidity Pre drying such streams for capture itself incur sizeable cost shying industries away from investing into these capture technologies Hence being able to capture CO2 directly from the humid flue gas is desirable For humid CO2 capture producing humidity water stable porous materials is still challenging This thesis s primary goal is to bring water stability into the framework of MOFs simultaneously increasing the number of CO2 interacting sites into the pore architecture This thesis proposes two strategies using the concept of quotWerner s theory of coordination complexes quot First choosing high ch