CO2 injection to granite and sandstone in experimental rock/hot water systems

Usage of oil shale produces abundant oil shale residue, which may not only directly cause serious pollution to the environment, but also result in a waste of resource. In this paper, acid leaching method and alkali soluble method were compared to obtain the optimum processing conditions for the preparation of white carbon black, which was determined as follows: the mass fraction of NaOH was 8 %, the alkali dissolving time was 5 h, and the reaction temperature was 100 °C. Then the performance characteristics of the obtained white carbon black were analysed by XRD, SEM and IR spectroscopy. The results showed that the product of silica has a particle size between 20 -30 nm and a purity of 98.4 %. Preparation of the high quality white carbon black might be a good way to make sufficient and reasonable use of oil shale residues, which will bring many environmental and social benefits.

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“…In comparison with water, Brown [1] noted that CO 2 has three favorable properties: large expansivity, lower viscosity, and much more stable than water as a solvent for rock minerals. He pointed out there are still unfavorable properties, such as lower heat conductivity of CO 2 . In recent years, many studies have been undertaken to investigate the CO 2 -brine-rock reaction, heat transmission, and rock mechanics of EGS with CO 2 [2,3,4,5,6,9] .…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on CO₂-Brine-Rock Interaction of Enhanced Geothermal Systems with CO₂as Heat Transmission Fluid

Wan

Song

2016

MATEC Web Conf.

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Abstract. Enhanced Geothermal Systems (EGS) with CO 2 instead of water as heat transmission fluid is an attractive concept for both geothermal resources development and CO 2 geological sequestration. Previous studies show that CO 2 has lots of favorable properties as heat transmission fluid and also can offer geologic storage of CO 2 as an ancillary benefit. However, after CO 2 injection into geological formations, chemical reaction between brine and rock can change chemical characteristics of saline and properties of rock such as porosity and permeability. Is this advantage or disadvantage for EGS operating? To answer this question, we have performed chemically reactive transport modeling to investigate fluid-rock interactions and CO 2 mineral carbonation of Enhanced Geothermal Systems (EGS) site at Desert Peak (Nevada) operated with CO 2 . The simulation results show that (1) injection CO 2 can create a core zone fulfilled with CO 2 as main working domain for EGS, and (2) CO 2 storage can induced self-enhancing alteration of EGS.

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CO2 injection to granite and sandstone in experimental rock/hot water systems

Cited by 77 publications

References 5 publications

Sorption Characteristics of CO<sub>2</sub> on Rocks and Minerals in Storing CO<sub>2</sub> Processes

Sorption Characteristics of CO<sub>2</sub> on Rocks and Minerals in Storing CO<sub>2</sub> Processes

Study on the Preparation of Silica Using Residues of Oil Shale

Numerical Study on CO₂-Brine-Rock Interaction of Enhanced Geothermal Systems with CO₂as Heat Transmission Fluid

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CO2 injection to granite and sandstone in experimental rock/hot water systems

Cited by 77 publications

References 5 publications

Sorption Characteristics of CO&lt;sub&gt;2&lt;/sub&gt; on Rocks and Minerals in Storing CO&lt;sub&gt;2&lt;/sub&gt; Processes

Sorption Characteristics of CO&lt;sub&gt;2&lt;/sub&gt; on Rocks and Minerals in Storing CO&lt;sub&gt;2&lt;/sub&gt; Processes

Study on the Preparation of Silica Using Residues of Oil Shale

Numerical Study on CO2-Brine-Rock Interaction of Enhanced Geothermal Systems with CO2as Heat Transmission Fluid

Contact Info

Product

Resources

About

Sorption Characteristics of CO<sub>2</sub> on Rocks and Minerals in Storing CO<sub>2</sub> Processes

Sorption Characteristics of CO<sub>2</sub> on Rocks and Minerals in Storing CO<sub>2</sub> Processes

Numerical Study on CO₂-Brine-Rock Interaction of Enhanced Geothermal Systems with CO₂as Heat Transmission Fluid