Date of Award
Master of Science in Chemical Engineering (MSChE)
Chemical and Petroleum Engineering
Dr. Eyas Mahmoud
Nayef Mohamed Ghasem
Natural gas is major resource in UAE, constitute about 90% methane and as compared to other fossil fuels, it is more environmentally friendly. Energy demand from natural gas can be projected to exceed two hundred exajoules per year in 2040. In the UAE, many natural gas filling stations are already built for utilizing natural gas as a vehicle transportation fuel where these materials have potential applications to store and deliver this fuel. This research aims to study various kinds of Metal-Organic Frameworks, and to investigate adsorption properties for the storage of natural gas and its delivery. MOFs possess porous material that exhibits a high deliverable capacity of gases. These are synthesized using strategies such as crystal engineering with varying organic groups such as linker length and hydrophilicity, pore shape, and phase changes. The main challenges in designing MOFs for methane storage are understanding the mechanical properties, developing thermal management solutions, and the effect of impurities on the working capacity as well as the manufacturing costs of MOFs. This thesis gives pathway to tackle such problems. Overall, HKUST-1 showed promising results for the various MOFs tested. Synthesis and characterization were done by scanning electron microscope, thermogravimetric analysis, X-ray diffraction, and nitrogen adsorption. Adsorption process, reaction heat, and total heat involved in the process were studied using Tian-Calvet calorimeter and gas chromatography. A significant part of this research was dedicated to designing and setting up the calorimeter used in obtaining the heat of adsorption. Moreover, the adsorption properties and separation of the gaseous mixture are also studied using the gas chromatography with some equipment modifications. Designing of MOFs, a class of adsorbents, is described considering the thermodynamics of adsorption of these porous materials for natural gas and methane storage. The thermodynamics of adsorption governs the adsorption isotherm and, therefore the deliverable capacity of stored natural gas and methane. Calorimetric and gas chromatography studies indicated that HKUST-1 has the best adsorbent among the tested MOFs
Ali, Labeeb, "Designing Metal-Organic Frameworks for Natural Gas Storage and Delivery" (2020). Chemical and Petroleum Engineering Theses. 7.