Carbon dioxide thickening: A review of technological aspects, advances and challenges for oilfield application

Effective viscosification of supercritical carbon dioxide by oligomers of 1-decene

“…Nanoparticles have also been mixed with CO 2 to achieve better mobility control in EOR applications ( Jafari et al., 2015 ; Dezfuli et al., 2020 ). In another recent review article, Pal et al. (2022) have reiterated the advances made in CO 2 viscosification for applications in EOR and fracking and classified the CO 2 thickeners into five main categories, including cosolvents, polymeric materials, and small molecule-associating compounds.…”

Chemical Recycling of High-Molecular-Weight Organosilicon Compounds in Supercritical Fluids

“…[ 77 , 78 ]. Moreover, the use of PDMS, oligomeric and low-molecular-weight siloxanes and their derivatives as thickeners for sc CO 2 is of particular interest for all the above mentioned recycling approaches that utilize sc CO 2 [ 93 ]. The use of sc CO 2 in the processes of thermal degradation of polysiloxanes also seems promising: it can be expected that an increase in the mobility of high-molecular-weight PDMS chains and a high solubility of the resulting low-molecular-weight cyclic siloxanes might lead to an increase in the efficiency of this process in sc CO 2 .…”

Effects of Various Solvents on Adsorption of Organics for Porous and Nonporous Quartz/CO2/Brine Systems: Implications for CO2 Geo-Storage

“…The greenhouse effect has contributed significantly to the rise in the Earth’s temperature and global warming. − One of the key gases responsible for the greenhouse effect is carbon dioxide, which is produced mainly from fossil-fuel combustion and oxidation. , Almost 36 billion tons of anthropogenic CO 2 emissions per annum have been attributed to stationary and non-stationary fossil fuel sources. , While alternative solutions have been proposed, − CO 2 capture and storage are regarded as a means for attaining the de-carbonization objectives and restraining the global rise in temperature to less than 2 °C. − Nevertheless, the storage process is very complex and requires a fundamental understanding of the fluid flow dynamics, rock-fluid interfacial interactions, storage/caprock wetting states, trapping capacities, and containment security of various geological storage formations. − …”