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Carbon Dioxide - Crossref

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Last Updated: 10 September 2022

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Prediction of Hydrogen Sulfide and Carbon Dioxide in HPHT Wells

Abstract It can be easily demonstrated that hydrogen sulfide and carbon dioxide partial pressure can be calculated based on the formation temperature for hot, high pressure, and clastic reservoirs. Even if downhole sample analysis results are less than the estimated, it is still recommended that these geochemical projections be used for early, untested wells in a field development initiative, especially H2S. The resulting predicted gas acidity and pH of ISO 15156/NACE MR01751 materials testing and corrosion control design is then useful in ISO 15156/NACE MR01751 materials qualification work and corrosion control planning.

Source link: https://doi.org/10.2118/97568-ms


Carbon Dioxide Foam Rheology in Porous Media: a CT Scan Study

The CO2 foam flows in a characteristic front-like manner during the transient stage, and water saturation remains at a relatively high level at the outlet of the porous media due to CO2 solubility and capillary end effect. When adding higher system backpressures, it is also found that CO2 foam flow shows increased liquid saturation near the outlet, and lower pressure drops under elevated system backpressures. Compared to WAG, the benefits of using foam in EOR processes such as water alternating foam show the benefit of using foam, specifically foam in water alternating foam, where foam flow has improved sweep efficiency and improved mobility control capability.

Source link: https://doi.org/10.2118/97552-ms


Age-related carbon dioxide reactivity in children after moderate and severe traumatic brain injury

OBJECTIVE The aim of this research was to determine carbon dioxide reactivity in children following traumatic brain injury. After a temporary rise in minute ventilation, thirty-eight mechanically ventilated children's daily CO 2 R testing was conducted by assessing changes in their bilateral middle cerebral artery flow velocities using transcranial Doppler ultrasonography. RESULTS Children under the age of 2 years old had a lower mean CO2 R decline over time. Compared to either of the other age groups, the 2u20135-year-old age group had higher mean CO2 R than younger patients and the highest CO 2 R values. CONCLUSIONS Abnormal CO 2 R is common in children following TBI, and the degree of impairment varies by age. Imperfectible CO 2 R results were attributed to reduced CO 2 R deterioration at discharge, although no clinical or laboratory parameters were found as risk factors for reduced CO 2 R. Lowering minimum CO 2 R values were correlated with poor CO 2 R.

Source link: https://doi.org/10.3171/2016.1.peds15564


Investigating the Impact of Transportation Infrastructure and Tourism on Carbon Dioxide Emissions in China

A suitable low-carbon tourism development model is found in the case of fully comprehending the principles of low-carbon tourism development and related policy concerns. Effective steps are given to the role of Chinese traffic settings in tourism, and the carbon pollution management scheme of the entire life cycle of traffic settings is determined, as well as the boundary of traffic carbon pollution on tourism.

Source link: https://doi.org/10.1155/2022/8421756


Post-Combustion Carbon Dioxide Enhanced-Oil-Recovery Development in a Mature Oil Field: Model Calibration Using a Hierarchical Approach

Summary We present a simulation study of a mature reservoir for carbon dioxide enhanced-oil recovery development. The aim of this research is to develop a robust predictive reservoir model by integrating multidecadal production data from a variety of temporal resolutions into the existing geologic model. This will be useful in determining flow units along with heterogeneity characteristics and their effect on subsurface flow mechanisms in order to guide the injection design and optimize CO2 sweep and oil recovery from the reservoir. Adjusting pore volume and aquifer strength was the first step used to achieve 70-year pressure and continuous production. Water-injection data for reservoir pressurization before CO2 injection is then included into the model to determine the formation permeability. More than 7 million cells are reparameterized using a set of linear-basis functions specified by a spectral decomposition of the grid-connectivity matrix. The parameterization reflects the permeability distribution of the permeability distribution in the case of history matching. The ability of fine-scale heterogeneity on CO2 sweep and oil recovery is shown by a historical-matched field-scale model, which can be used to produce and initialize a detailed fine-scale model for a CO2 pilot zone that will be used to analyze the effect of fine-scale heterogeneity on CO2 sweep and oil recovery. The application of a novel geologic-model parameterization and a time-matching work flow for modeling of a mature oil field with decades of production history, which is now being developed with CO2 EOR is the highlight of this book.

Source link: https://doi.org/10.2118/187116-pa


Metal oxides enhance the absorption performance of N-methyldiethanolamine solution during the carbon dioxide capture process

The effects of each metal oxide on CO 2 capture by the MDEA solution, including CO 2 reaction heat, absorption rate, cyclic loading, and carbon conversion rate, were determined. It was discovered that supplementation with appropriate calcium oxide and magnesium oxide proportions raises the CO2 absorption rate and cuts the MDEA solution's saturation time by 9%-17%. MDEA's rise in CO2 absorption rate after adding MgO and CaO can be mediated by two different mechanisms, according to the experimental results.

Source link: https://doi.org/10.21203/rs.3.rs-1983228/v1


Impact of peatlands on carbon dioxide (CO<sub>2</sub>) emissions from the Rajang River and Estuary, Malaysia

We present the first measurements of carbon dioxide partial pressure in the Rajang River and Estuary, Malaysia's longest river. Calculated CO2 fluxes to the atmosphere were 1. 5 g C mu22121 during the wet season and 1. 7 g C m(u22121 during the dry season, according to three different parameterizations for the gas transfer velocity. This is at the low end of reported figures for Southeast Asian peat-draining rivers, but it is close to those for Southeast Asian rivers that do not flow through peat deposits. Peat coverage is, by itself, insufficient as the sole predictor of CO2 emissions from peat-draining rivers, but other factors, such as the spatial distribution of peat and pH, must also be considered.

Source link: https://doi.org/10.5194/bg-16-17-2019


Modeling of optimized lattice mismatch by carbon-dioxide laser annealing on (In, Ga) co-doped ZnO multi-deposition thin films introducing designed bottom layers

As the bottom layer had the lowest mismatch rate between the substrate and the bottom layer of the film, the substrate and the bottom layer of the film showed the lowest mismatch rate between the substrate and the bottom layer of the film, we co-doped ZnO multi-deposition thin films with Ga-doped ZnO with Ga-doped ZnO as the lowest mismatch rate between the substrate and the film's lowest mismatch rate between the substrate and the bottom layer of the substrate and the lowest mismatch between the substrate and the lowest mismatch rate between the substrate and the film's on film's on the film's on the film's on the lowest mismatch rate between the ZnO deposition and the film's on film showed the ZnO co-doped ZnO co-doped ZnO co-doped ZnO By reducing lattice mismatch, the carbon-dioxide laser annealing process can improve electrical properties by reducing lattice mismatch. The optimized sheet resistance of 34. 5 k/sq and a high transparency rate of nearly 90% in the visible light wavelength region were obtained after applying the carbon-dioxide laser annealing process to the co-doped ZnO multi-deposition thin films with Ga-doped ZnO as the bottom layer and a high transparency rate of nearly 90%.

Source link: https://doi.org/10.21203/rs.3.rs-1984771/v1


Evaluation the Effect of Adding Silanized Silicon Dioxide Nano Filler and Carbon Nanotube Composite on Some Properties of Heat Cured Acrylic Denture Base Material

Polymethyl methacrylate's physical characteristics are still far from ideal to meet dental applications' stringent mechanical demands.

Source link: https://doi.org/10.55562/jrucs.v38i2.223

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions