Effects of ultrasonic waves on carbon dioxide solubility in brine at different pressures and temperatures

Hossein Hamidi,Adi Putra Pradana,Bastian Andoni,Chingis Akhmetov,Roozbeh Rafati,Amin Azdarpour,Amin Sharifi Haddad,Panteha Ghahri,Erfan Mohammadian

doi:10.1007/s12182-017-0165-2

Hossein Hamidi, Adi Putra Pradana + Show 7 more

Open Access

https://doi.org/10.1007/s12182-017-0165-2

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Abstract

The adverse impacts of CO2 emission on the global warming highlight the importance of carbon capture and storage technology and geological storage of CO2 under solubility trapping mechanisms. Enhancing the solubility of CO2 in formation water has always been the focus of research in the area of CO2 sequestration. Ultrasound techniques are one of the environmentally friendly methods that use high-intensity acoustic waves to improve gas solubility in liquids. Ultrasonic waves can alter the properties of different phases that lead to chemical reactions and provide a means to increase the solubility of CO2 in connate water. In this study, we investigated the effects of ultrasound on the solubility of CO2 in connate water under different conditions of pressure, temperature, and salinity. The results showed that the solubility of CO2 was improved with increasing pressure under ultrasonic effects. However, the solubility of CO2 was inversely proportional to the increase in brine salinity and temperature. Therefore, it was concluded that the solubility of CO2 might be enhanced in the presence of ultrasound.

Highlights

Excessive emission of carbon dioxide (CO2) into the atmosphere is one of the environmental challenges which causes critical effects such as sea level rise, melting of arctic ice, and increase in the earth’s temperature, which is called the phenomenon of global warming
It consists of a Genesis TM XG-500-6 ultrasonic wave generator, CO2 cylinder, ISCO pump made by Teledyne, 100-mL autoclave reactor equipped with ultrasound transducers, and a magnetic stirrer
In the first series of experiments, effects of ultrasound (US) on the solubility of CO2 in distilled water at different pressure (1–210 atm) and temperature (60, 80, and 100 °C) conditions were investigated, and the results were compared with the cases where no source of ultrasound (NUS) was used (Fig. 2)

Summary

Introduction

Excessive emission of carbon dioxide (CO2) into the atmosphere is one of the environmental challenges which causes critical effects such as sea level rise, melting of arctic ice, and increase in the earth’s temperature, which is called the phenomenon of global warming. Nguyen (2003) suggested four methods for geological storage of CO2: (1) utilization of CO2 for enhanced oil recovery (EOR) processes, (2) use of CO2 to improve recovery from coal-bed methane, (3) injection of CO2 into depleted oil and gas reservoirs, and (4) injection of CO2 into deep saline aquifers. Among these methods, saline aquifers are most anticipated due to their considerable storage capacity and extensive distribution around the world (Metz et al 2005; Bachu 2000; Schrag 2007)

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