Liquid CO2 is a non-polar fluid, and the injection of fluid into coal seam causes strong water–rock interaction between inorganic minerals organic matter in acidic fluid. The are thereby corroded precipitated to different degrees, dissolved extracted, which further changes physical chemical properties rock. Three kinds samples with metamorphic degrees were selected as research objects, methods ...

Bio-oil is often extracted from biomass using liquid solvent or supercritical carbon dioxide. However, extraction these methods has several disadvantages. In this study, expanded hexane with dioxide examined as a new solvent. The objective of study to develop technique for the bio-oil dioxide; rice bran used raw biomass. was carried out at 25— 27°C, 5.0—5.3 MPa, and 0.78—0.94 mole fraction in h...

As the volume of CO2, one of greenhouse gases linked to global warming, in the atmosphere increases, there has been an increasing interest in CO2 sequestration. Aqueous carbonation, which involves the extraction of Mg from serpentine minerals and the subsequent carbonation reaction with CO2 to form the geologically stable mineral MgCO3, has been proposed as a promising CO2 sequestration technol...

Advancement in oxygenator membrane technology has further expanded the boundaries in the clinical application of extracorporeal carbon dioxide removal (ECCO2R). Despite the advent of modern poly-4-methyl-1-pentene (PMP) membranes, limited information exists on the performance of these membranes at low sweep gas and blood flows. Moreover, physiological relationships for CO2 removal at these flow...

The use of CO2 for Enhanced Oil Recovery (EOR) has been around since the early 70’s and was developed to enable oil extraction from declining fields. The process involves injecting CO2 from either natural or man-made sources into the ground to free up trapped crude oil that would otherwise not be possible to obtain. This process significantly improves the lifetime production of oil from mature ...

Although there is now some agreement with the view that the supply of photochemical energy may influence photosynthetic rate (P) at high CO2 pressures, it is less clear whether this limitation extends to P at low CO2. This was investigated by measuring P per area as a function of the intercellular CO2 concentration (C,) at different levels of photochemical energy supply. Changes in the latter w...