Xem 1-8 trên 8 kết quả Modeling co2
  • CO2 injection has recently been shown to provide significant enhanced oil recovery from naturally fractured reservoirs1. Li et al. (2000) performed CO2 injection at 1750 psig on artificially-fractured cores after water flooding in a dead-oil system. Gravity drainage was suggested to be the dominant recovery mechanism in these tests, with significant tertiary oil recovery after water flooding. The authors observed that the recovery of initial oil at the start of the CO2 injection declined as the rock permeability decreased and the initial water saturation increased....

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  • CO2 injection has recently been shown to provide significant enhanced oil recovery from naturally fractured reservoirs 1 . Li et al. (2000) performed CO2 injection at 1750 psig on artificially-fractured cores after water flooding in a dead-oil system. Gravity drainage was suggested to be the dominant recovery mechanism in these tests, with significant tertiary oil recovery after water flooding. The authors observed that the recovery of initial oil at the start of the CO2 injection declined as the rock permeability decreased and the initial water saturation increased. Darvish et al.

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  • The aim of Caffeine and chlorogenic acid separation from raw coffee beans using supercritical CO2 in water was to develop new process for extracting and separating hydrophilic and hydrophobic compounds from coffee beans using supercritical CO in water. In this work, experiments and simulation of the process has been conducted. Chlorogenic acid and caffeine from coffee beans were used as model compounds of hydrophilic and hydrophobic compounds, respectively.

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  • Current average fuel economy levels vary consid- erably by country. Across the OECD the average figure in 2005 was around 8 litres per 100 km for new cars (including SUVs and minivans and in- cluding both gasoline and diesel vehicles). With a 50% fuel economy improvement, the average new car performance in OECD markets would improve to around 4 litres per 100 km (about 90 g/km of CO2).

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  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Simulated soil CO2 efflux and net ecosystem exchange in a 70-year-old Belgian Scots pine stand using the process model SECRETS...

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  • Co 2+ binding RNA aptamers were chosen as research models to reveal the structural basis underlying the recognition of Co 2+ by RNA, with the application of two distinct methods. Using the nucleotide analog interfer-ence mapping assay, we found strong interference effects after incorpora-tion of the 7-deaza guanosine phosphorotioate analog into the RNA chain at equivalent positions G27 and G28 in aptamer no.

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  • They find that the elasticity of CO2 emissions and energy are close to unity (i.e., a 1% increase in population leads to an approximately 1% increase in CO2 emissions). They do not estimate how these elasticities may vary with population levels. All of these results are based on cross-sectional data for 1 year only. Finally, Shi (2003), again in the context of the IPAT model, uses a panel of cross-sectional and time series data. Shi finds population elas- ticities for CO2 of between 1.41 and 1.

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  • Estimation results for CO2 emissions are provided in Table 1. Column I reports results for the basic model, in which total population size is the only demographic aspect looked at. The results are generally in line with expectations. 3 Since all variables are expressed in logarithms, the estimated coefficients can be interpreted as elasticities. Affluence (GDPpc) has the expected positive impact on emissions and its elasticity is just below one. The manufacturing share (MANFsh) is insignificant, but a higher energy intensity (ENERGYint) is associated with higher emissions.

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