نتایج جستجو برای: co2 fraction
تعداد نتایج: 220226 فیلتر نتایج به سال:
This paper examines the sensitivity and results for a new product, CO2, from existing data from solar-observing Fourier Transform InfraRed (FTIR) spectrometer at NyÅlesund, Spitsbergen. This instrument is part of a world-wide Network for the Detection of Atmospheric Composition Change (NDACC), which has collected data since 1978. The sensitivity and results are compared to a newer network desig...
[1] Precision requirements are determined for space-based column-averaged CO2 dry air mole fraction (XCO2) data. These requirements result from an assessment of spatial and temporal gradients in XCO2, the relationship between XCO2 precision and surface CO2 flux uncertainties inferred from inversions of the XCO2 data, and the effects of XCO2 biases on the fidelity of CO2 flux inversions. Observa...
from ambient levels of 360 mol mol 1 increased vegetative biomass by 40% and boll biomass by 20% (Reddy The consequences of elevated carbon dioxide concentrations et al., 1997). Open-top chamber experiments (Kimball ([CO2]) and N nutrition on cotton (Gossypium hirsutum L.) growth, and Mauney, 1993) showed that elevated [CO2] of 650 development, yield, and fiber quality were determined. Cotton c...
Using inorganic carbon measurements from an international survey effort in the 1990s and a tracer-based separation technique, we estimate a global oceanic anthropogenic carbon dioxide (CO2) sink for the period from 1800 to 1994 of 118 +/- 19 petagrams of carbon. The oceanic sink accounts for approximately 48% of the total fossil-fuel and cement-manufacturing emissions, implying that the terrest...
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...
Environment Canada methods for acute toxicity tests with rainbow trout require continuous aeration of test solutions during exposure. Depending on the sample, this procedure can result in an increase in pH as dissolved carbon dioxide (CO2) is stripped from solution as a result of aeration. In samples that contain ammonia, the pH may increase to the point where the unionized fraction results in ...
In this study, the complexation reaction between Alprazolam (ALP) and metal ions (Zn2+, Ni2+, Cu2+ and Co2+) was investigated by using spectrophotometry in ethanol solvent. The stoichiometry of M+/ALP complexes was calculated by applying the Job, molar ratio and Continuous Changes methods and the relevant diagrams were plotted for each metal ions in each method. The results show that the obtain...
This paper describes a technique for achieving a compact aqueous spray that incorporates CO2 into the spray at low temperatures (T < 10 °C) and high pressures (P > 10 MPa). A high-pressure spray apparatus was used to explore the effects of temperature (4-25 °C), nominal CO2 mole fraction (0-0.12), in-line filter pore size (0.5-7 μm), and additives on the high-pressure (12-19 MPa) water spray pa...
The capacity of fluvial brine-bearing formations to sequester CO2 is investigated using numerical simulations of CO2 injection and storage. Capacity is defined as the volume fraction of the subsurface available for CO2 storage and is conceptualized as a product of factors that account for two-phase flow and transport processes, formation geometry, formation heterogeneity, and formation porosity...
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