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One remaining issue of CO2 processes are problems in connection with the lubrication oil. The objective of this project is to prove the feasibility of a small oil free semi hermetic piston type CO2-compressor for supercritical heat pump applications with large temperature spans. These processes involve high pressures like 35 bar suction pressure and 80 to 150 bar delivery pressure. A functional...

The classic problem of free riding arises when nations act to curtail emissions of carbon dioxide (CO2) and other potential greenhouse gases. When damages from emissions are global rather than local, countries that do not participate in policies directed at reducing global climate change receive the benefits of other countries’ actions without incurring the costs. Past research and game-theoret...

The classic problem of free riding arises when nations act to curtail emissions of carbon dioxide (CO2) and other potential greenhouse gases. When damages from emissions are global rather than local, countries that do not participate in policies directed at reducing global climate change receive the benefits of other countries’ actions without incurring the costs. Past research and game-theoret...

This paper is the first of a series that attempts to assess the possible health and safety risks associated with large scale CO2 sequestration in deep brine reservoirs. The approach is based on analysis of available data on the operational track record from CO2 transportation and injection associated with enhanced oil recovery (CO2-EOR) in the US. This paper is particularly concerned with ident...

Equilibrium adsorption property of multi-walled carbon nanotubes with OH group was studied using experimental design for the adsorption of CO2 , CH4 and H2 . The effect of temperature, pressure, their binary interactions and quadratic terms were studied for adsorption capacity of nanotubes and the results were analyzed by the face centered central composite design method and analysis of varianc...

The potential biodegradability of several vegetable oil-based polymers was assessed by respirometry in soil for 60–100 days at temperatures of 30–58 C. Films of soybean oil and linseed oil which were oxidatively polymerized (Co catalyst) on a kraft paper support were 90%–100% mineralized to CO2 after 70 days at 30 C. Mineralization of polymerized tung oil to CO2 was much slower than soy or lins...

The aim of this work was to study the biodegradation of different types of automotive lubricant oils adapted to the aqueous medium using a base inoculum and an aqueous inoculum. Four treatments were carried out in two consecutive and similar experiments: T1 (control); T2 (half-synthetic oil); T3 (mineral oil); T4 (used oil). The results showed the following decreasing order of CO2 production in...

The nonideality of CO2 solutions in ionic liquids and other low volatile solvents, with which CO2 is known to form electron donor-acceptor (EDA) complexes, is here investigated. It is shown that the deviations from the ideality observed are not related with the stability of the EDA complex formed, and inmost cases these deviations are small and dominated by entropic effects. For this reason, wh...

Carbon dioxide flooding is considered to be one of the most effective enhanced oil recovery methods for the light oil reservoirs. Depending on the operating pressure, the process might be miscible or immiscible. Minimum miscibility pressure (MMP) is the most important parameter for assessing the applicability of any miscible gas flood for an oil reservoir. The miscibility condition is determine...