Mathematical modeling of the long-term safety of carbon dioxide (CO2) storage in underground reservoirs

2010 ◽  
pp. 240-267 ◽  
Author(s):  
K. Pruess ◽  
J. Birkholzer ◽  
Q. zhou
Keyword(s):  
Mathematical Modeling ◽  
Carbon Dioxide ◽  
Co2 Storage ◽  
Carbon Dioxide Co2 ◽  
Underground Reservoirs

Measuring complex for monitoring carbon dioxide in air

2021 ◽  
pp. 68-71
Author(s):  
Igor M. Ageev ◽  
Yuri M. Rybin
Keyword(s):  
Carbon Dioxide ◽  
High Selectivity ◽  
Distilled Water ◽  
Measuring Systems ◽  
Advantages And Disadvantages ◽  
Measuring Complex ◽  
Co2 Level ◽  
Carbon Dioxide Co2 ◽  
Term Monitoring

The advantages and disadvantages of infrared and electrochemical gas analyzers for carbon dioxide CO2 are described. The possibility of using conductometric sensors with distilled water for monitoring the CO2 content in the air has been investigated. Two identical measuring systems were manufactured, each containing two open-type conductometric cells, a matching device and a personal computer. With the help of these complexes, experiments were carried out on the simultaneous measurement of the CO2 content in the air in two places (a laboratory room and a building in a forest, located at a distance of 15 km from each other) with deliberately different daily dynamics of the CO2 level change. A special experiment was carried out, which made it possible to obtain an estimate of the inertia of conductometric cells and a conversion factor for the values of CO2 content into standard units of measurement. It is shown that the daily dynamics of changes in the electrical conductivity of distilled water in open cells corresponds to the expected dynamics of changes in the CO2 content in the rooms where the measurements were carried out. The operability of the measuring complex and the possibility of creating on its basis a device for long-term monitoring of the CO2 content in the air mixture of gases has been confirmed. The principal high selectivity of the measuring complex to CO2 in relation to other gases of the atmosphere has been established.

scholarly journals Update on GOSAT TANSO-FTS performance, operations, and data products after more than 6 years in space

2016 ◽  
Vol 9 (6) ◽  
pp. 2445-2461 ◽  
Author(s):  
Akihiko Kuze ◽  
Hiroshi Suto ◽  
Kei Shiomi ◽  
Shuji Kawakami ◽  
Makoto Tanaka ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Near Infrared ◽  
Satellite System ◽  
Fourier Transform Spectrometer ◽  
Infrared Sensor ◽  
Data Set ◽  
Dry Air ◽  
Retrieval Accuracy ◽  
Carbon Dioxide Co2

Abstract. A data set containing more than 6 years (February 2009 to present) of radiance spectra for carbon dioxide (CO2) and methane (CH4) observations has been acquired by the Greenhouse gases Observing SATellite (GOSAT, available at http://data.gosat.nies.go.jp/GosatUserInterfaceGateway/guig/GuigPage/open.do), nicknamed “Ibuki”, Thermal And Near infrared Sensor for carbon Observation Fourier Transform Spectrometer (TANSO-FTS). This paper provides updates on the performance of the satellite and TANSO-FTS sensor and describes important changes to the data product, which has recently been made available to users. With these changes the typical accuracy of retrieved column-averaged dry air mole fractions of CO2 and CH4 (XCO2 and XCH4, respectively) are 2 ppm or 0.5 % and 13 ppb or 0.7 %, respectively. Three major anomalies of the satellite system affecting TANSO-FTS are reported: a failure of one of the two solar paddles in May 2014, a switch to the secondary pointing system in January 2015, and most recently a cryocooler shutdown and restart in August 2015. The Level 1A (L1A) (raw interferogram) and the Level 1B (L1B) (radiance spectra) of version V201 described here have long-term uniform quality and provide consistent retrieval accuracy even after the satellite system anomalies. In addition, we discuss the unique observation abilities of GOSAT made possible by an agile pointing mechanism, which allows for optimization of global sampling patterns.

scholarly journals Pore Network Modelling of Porous Media for Carbon Dioxide Sequestration: A Case Study of Pakistan

2021 ◽  
Vol 12 (1) ◽  
pp. 64
Author(s):  
Nadeem Ahmed Sheikh ◽  
Irfan Ullah ◽  
Muzaffar Ali
Keyword(s):  
Carbon Dioxide ◽  
Porous Media ◽  
Co2 Storage ◽  
Aqueous Media ◽  
Pore Network ◽  
Differential Pressure ◽  
Porous Network ◽  
Network Modelling ◽  
Co2 Capturing ◽  
Carbon Dioxide Co2

Carbon dioxide (CO2) storage in natural rocks is an important strategy for reducing and capturing greenhouse gas emissions in the atmosphere. The amount of CO2 stored in a natural reservoir such as natural rocks is the major challenge for any economically viable CO2 storage. The intricate nature of the porous media and the estimates of the replacement of residing aqueous media with the invading CO2 is the challenge. The current study uses MATLAB to construct a similar porous network model for simulation of complex porous storage. The model is designed to mimic the overall properties of the natural porous media in terms of permeability, porosity and inter-pore connectivity. Here a dynamic pore network is simulated and validated, firstly in the case of a porous network with one fluid invading empty network. Subsequently, the simulations for an invading fluid (CO2) capturing the porous media with filled aqueous brine solution are also carried out in a dynamic fashion. This resembles the actual storage process of CO2 sequestration in natural rocks. While the sensitivity analysis suggests that the differential pressure and porosity have a direct effect on saturation, increasing differential pressure or porosity increases the saturation of CO2 storage. The results for typically occurring rocks in Pakistan are also studies and related with the findings of the study.

GREENHOUSE GAS EMISSION FROM COMBUSTION OF ASSOCIATED PETROLEUM GAS IN RUSSIA

2021 ◽  
pp. 54-61
Author(s):  
N. V. Popov ◽  
◽  
I. L. Govor ◽  
M. L. Gitarskii ◽  
◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Greenhouse Gases ◽  
Greenhouse Gas ◽  
Greenhouse Gas Emission ◽  
Component Composition ◽  
Emission Factors ◽  
Gas Emission ◽  
Associated Petroleum Gas ◽  
Carbon Dioxide Co2

The average weighted long-term component composition of associated petroleum gas burned at the fields in Russia is obtained, where the volume fractions of carbon dioxide (CO2) and methane (CH4) make up 0.8 and 66.4%, respectively. Based on it, the national emission factors of greenhouse gases from the flaring of associated petroleum gas are developed: the values are equal to 2.76 103 t CO2 and 0.0155 103 t CH4 per 1 106 m3 of the gas burnt. The calculations based on the emission factors led to the 37% increase in total equivalent emission of CO2 and CH4 as compared to the calculations based on the IPCC emission factors. The use of the national emission factors increases the reliability of the estimates of greenhouse gas emissions and the evaluation of their impact on climate.

Carbon dioxide (CO2) storage and sequestration of land cover in the Leyte Geothermal Reservation

2002 ◽  
Vol 25 (2) ◽  
pp. 307-315 ◽  
Author(s):  
Rodel D Lasco ◽  
Joveno S Lales ◽  
Ma.Theresa Arnuevo ◽  
Ina Q Guillermo ◽  
Agnes C de Jesus ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Land Cover ◽  
Co2 Storage ◽  
Carbon Dioxide Co2

Gas-Compositional Effects on Mineralogical Reactions in Carbon Dioxide Sequestration

SPE Journal ◽  
2011 ◽  
Vol 16 (04) ◽  
pp. 949-958 ◽  
Author(s):  
Prashanth Mandalaparty ◽  
Milind Deo ◽  
Joseph Moore
Keyword(s):  
Carbon Dioxide ◽  
Carbon Capture ◽  
Carbon Dioxide Sequestration ◽  
Ionic Concentration ◽  
Experimental Apparatus ◽  
Different Temperatures ◽  
Geochemical Reactions ◽  
Concentration Changes ◽  
Carbon Dioxide Co2

Summary It may be possible to lower costs of carbon capture and sequestration by keeping constituents such as sulfur dioxide (SO2) in the flue-gas stream. The reactive behavior of pure carbon dioxide (CO2) and CO2+SO2 mixtures within a geologically realistic environment was examined in this paper. The experimental apparatus consisted of a series of high-pressure reactors operated at different conditions and with different feed-gas compositions to observe changes in both the rock and water compositions. The rock consisted of equal proportions of quartz, calcite, andesine, dolomite, chlorite, and magnesite (constituents in arkose or dirty sandstone). The brine was prepared from laboratory-grade sodium chloride. Several long-term batch experiments with pure CO2 were carried out at different temperatures. Each mineral in the mixture showed evidence of participating in the geochemical reactions. Layers of calcite were seen growing on the surface of the arkose. Analcime deposits were omnipresent, occurring either as large connected aggregates or as deposits on the surfaces of other minerals (quartz). Calcite depositions were observed as amorphous masses intergrown with the feed. The CO2+SO2 mixture experiments showed growth of euhedral anhydrite crystals and pronounced dissolution patterns over the examined surfaces. The growth of these new phases would lead to significant changes in the petrophysical properties of the rock. The trends in ionic-concentration changes in the aqueous phase complemented the changes in the rock chemistry.

scholarly journals Self-Cleaning Properties of Cellulosic Fabrics (A Review)

2021 ◽  
Vol 12 (2) ◽  
pp. 1847-1855
Keyword(s):  
Carbon Dioxide ◽  
Everyday Life ◽  
Light Source ◽  
Uv Light ◽  
The Self ◽  
Medical Textiles ◽  
Self Cleaning ◽  
Carbon Dioxide Co2

This article provides an overview of a technology of photocatalytic self-cleaning of fabric that is a photocatalyst like (ZnO or TiO2 or other materials ) that decomposes organic stain into water and carbon dioxide(CO2) in the presence of a UV light source. In this article, the photocatalytic techniques are presented. In various applications like textiles, which usually are used in everyday life, the self-cleaning principle is useful. These technologies can also be developed in other applications such as medical textiles, athletic wear, military uniforms, and outdoor fabrics. It is also desirable because it efficiently conserves water and enhances the appearance of the atmosphere and decreases energy in the long term, laundry cost and time as well.

scholarly journals Towards a stable and absolute atmospheric carbon dioxide instrument using spectroscopic null method

2013 ◽  
Vol 6 (7) ◽  
pp. 1611-1621 ◽  
Author(s):  
B. Xiang ◽  
D. D. Nelson ◽  
J. B. McManus ◽  
M. S. Zahniser ◽  
S. C. Wofsy
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Field Measurements ◽  
Term Operation ◽  
Long Term Stability ◽  
Atmospheric Carbon ◽  
Carbon Dioxide Co2 ◽  
Stability And Accuracy ◽  
Spectral Null

Abstract. We present a novel spectral method to measure atmospheric carbon dioxide (CO2) with high precision and stability without resorting to calibration tanks during long-term operation. This spectral null method improves precision by reducing spectral proportional noise associated with laser emission instabilities. We employ sealed quartz cells with known CO2 column densities to serve as the permanent internal references in the null method, which improve the instrument's stability and accuracy. A prototype instrument – ABsolute Carbon dioxide (ABC) is developed using this new approach. The instrument has a one-second precision of 0.02 ppm, which averages down to 0.007 ppm within one minute. Long-term stability of within 0.1 ppm is achieved without any calibrations for over a one-month period. These results have the potential for eliminating the need for calibration cylinders for high accuracy field measurements of carbon dioxide.

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