Understanding initial opportunities and key challenges for CCUS deployment in India at scale

Vishal, Vikram; Chandra, Debanjan; Singh, Udayan; Verma, Yashvardhan

doi:10.1016/j.resconrec.2021.105829

Cited by 56 publications

(25 citation statements)

References 186 publications

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“…To meet the global energy requirements of large and developing populations, the past few decades have seen increased application of fossil fuels globally. 1 While fossil fuels have primarily contributed toward improvement in the quality of life, its combustion has also resulted in a sharp increase in emission of greenhouse gases (GHGs) to the atmosphere. This increased contribution from the fossil fuels toward atmospheric emissions, has been identified as one of the major causes for global warming and climate change in the recent years.…”

Section: Introductionmentioning

confidence: 99%

“…To meet the global energy requirements of large and developing populations, the past few decades have seen increased application of fossil fuels globally . While fossil fuels have primarily contributed toward improvement in the quality of life, its combustion has also resulted in a sharp increase in emission of greenhouse gases (GHGs) to the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Supercritical CO₂ on Shale Reservoirs and Its Implication for CO₂ Sequestration

et al. 2022

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Hydraulic fracturing has transformed the international energy landscape by becoming the go-to method for the exploitation of natural gas from unconventional shale reservoirs. However, in the recent years, the search for an alternative method of shale-gas exploration has intensified, because of various problems (e.g., contamination of ground and surface water, overexploitation of precious water resources, air pollution, etc.) associated with the usage of water-based fracturing techniques. The use of CO2 for shale gas exploitation has emerged as a better alternative to aqueous-based gas exploration techniques. CO2 when injected into deep shale reservoirs, transitions into supercritical CO2 (SC-CO2) when temperature and pressure condition exceeds the critical point, i.e., 31.1 °C and 7.38 MPa. In this paper, we comprehensively review the impact of SC-CO2 on shale gas reservoirs during the different stages of shale-gas exploration, i.e., (i) drilling, which involves the superiority of SC-CO2 over water-based drilling fluids, in terms of achieving under-balanced well condition, higher rates of penetration, and resistance to formation damage; (ii) fracturing, which involves factors affecting the tortuosity of fractures created by SC-CO2 fracturing, breakdown pressure, and proppant-carrying capacity; and (iii) injection, which involves the twin-headed benefit of enhanced recovery due to CO2/CH4 competitive adsorption and geological sequestration, CO2 vs CH4 excess sorption as a function of pressure, etc. Several research works have indicated discrepancies on how SC-CO2 impacts different shale properties. Some studies show low-pressure N2-gas-adsorption-derived surface area and total pore volume to be increasing with SC-CO2 imbibition, while others show a decreasing trend for the same. Similarly, for some shales, the quartz content, along with the clay mineral contents, decreased as the exposure to SC-CO2 increased, while in some other studies, with similar long-term exposure to SC-CO2, the quartz content was observed to increase along with the decrease in clay content and vice versa. Essentially, the increased exposure to SC-CO2 results in the dissolution of primary porous structures and fractures, and reformation of newer porous structure and conduits in shales. Nonetheless, these changes in the mineralogy weaken the microstructure of the rock bringing significant changes in the mechanical properties of the shales with implications on the wellbore stability and fracturing efficiency. The mechanical properties such as uniaxial compressive strength (UCS), Young’s modulus, and tensile strength decrease as the SC-CO2 saturation period increases. However, some studies have shown factors like bedding angle and phase-state of CO2 having varying effect on the strength behavior of the shales. Moreover, changes in the structure of shales caused by the creation of fractures and the reduction of their strength can also pose major risks, because of potential leakage of CO2 through these created pathways. How these processes would i...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of Supercritical CO₂ on Shale Reservoirs and Its Implication for CO₂ Sequestration

et al. 2022

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“…Meanwhile, the powdered samples were sealed into a vacuum glass bottle. (2) Next, aqueous ZnCl 2 solution with densities of 1.34 and 1.39 g/cm 3 for low-rank coal samples, 1.25 and 1.4 g/ cm 3 for medium-rank coal samples, and 1.4 and 1.45 g/cm 3 for high-rank coal samples were prepared. The density errors were controlled to less than 0.005 g/cm 3 .…”

Section: Methods 221 Methodology Of the Centrifugal Flotationmentioning

confidence: 99%

“…(7) The samples sunk at the bottom of the bottle were collected. Steps 3−6 were repeated using a heavy liquid with a density of 1.39 g/cm 3 to obtain low-rank coal samples of medium density and high density. (8) Steps 2−7 were repeated to obtain the low-, medium-, and high-density powdered samples for low-, medium-, and high-rank coal samples with different powder sizes, respectively (Figure 2a).…”

Section: Methods 221 Methodology Of the Centrifugal Flotationmentioning

confidence: 99%

Pore Structure and Adsorption Characteristics of Maceral Groups: Insights from Centrifugal Flotation Experiment of Coals

et al. 2023

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Coal has various types of macerals, which have different pore structures and adsorption properties that change with coal’s thermal metamorphism. In-depth study of the characteristics of different coal macerals, especially the pore structure and adsorption properties, can better predict the coal reservoir gas storage capacity and migration ability. In this study, the sub-samples enriched in a specific maceral group with different coal ranks and particle sizes were obtained by centrifugal flotation experiments. Then, experiments containing low-temperature N2 isotherm adsorption (LT-N2GA), low-temperature CO2 isotherm adsorption (LT-CO2GA), and methane isothermal adsorption were carried out on the sub-samples to quantitatively analyze the evolution characteristics of pore structure and adsorption properties of different maceral groups. The results showed the following: (1) The separation effect of the light maceral groups by centrifugal flotation experiments increased with the decrease of particle sizes, which were treated with the heavy liquid of low and medium densities, while that of the heavy maceral groups had the relatively best separation effect in the particle sizes of 0.1–0.125 mm, which were treated with the heavy liquid of high densities. (2) The vitrinite-enriched samples had more ultra-micropores (mainly within the diameter range of 0.4–0.65 nm), while the inertinite enriched samples had more mesopores and transition pores (mainly within the diameter range of 40–50 nm). (3) For the low-rank coal, inertinite had more potential methane adsorption capacity. However, for the medium- and high-rank coal, vitrinite had more potential methane adsorption capacity. (4) For the low-rank coal, the adsorption potential and adsorption space increased with the increase of the inertinite content, while the adsorption potential, adsorption space, and surface free energy for the medium- and high-rank coal increased with the increase of vitrinite content. It is expected that the results can deepen the understanding about the gas storage capacity and migration ability and be used in the prevention of gas outburst and the reduction of carbon emission.

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“…Recently, the reduction of CO2 emissions in the iron and steel industry has mainly involved three aspects: the upgrading of existing mature energy-saving technologies, the development and industrialization of key energy-saving technologies and the development and application of cutting-edge technologies [7,8] . Extensive studies on carbon emissions in the iron and steel industry have been conducted, mainly focusing on the use of CCS [9][10][11][12] , CCU [13][14][15][16] , and CCUS [17][18][19][20] to reduce carbon emissions. CCS technology includes three parts: carbon dioxide collection / capture, transportation, and storage, which focuses on storage after capture.…”

Section: Introductionmentioning

confidence: 99%

Development and Application of Converter COMI-B Technology: A New Way of CO<sub>2</sub> Utilization

Cao¹,

Dong²,

Zhu³

et al. 2023

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CO2 has characteristic properties and reactions at converter smelting temperature, and the chemical reaction between CO2 and elements such as C and Si in the molten pool has bubble proliferation and cooling effects, which can effectively improve the kinetic and thermodynamic conditions of converter smelting. Here, an experimental study and industrial test on the application of CO2 in converter smelting were carried out. The smelting effects of Mode-1 and Mode-2 with total CO2 injection amounts of 229 Nm3 and 196 Nm3, respectively, were compared, and the changes in molten steel and slag compositions, dust removal, and gas are analyzed. The test results show that converter top and bottom blowing CO2 technology (COMI-B)technology had significant metallurgical advantages over the N-Mode; the dephosphorization rate increased by 4.2%, slag (FeO) content was reduced by 2.04%, end point nitrogen content of molten steel was reduced by 20%, gas recovery increased by 8.29 Nm3/t, and soot production reduced by 14.7%. The results of the study provide reference for the application of COMI-B technology in converters in the iron and steel industry and develop a new path for resource utilization of CO2.

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Understanding initial opportunities and key challenges for CCUS deployment in India at scale

Cited by 56 publications

References 186 publications

Impact of Supercritical CO₂ on Shale Reservoirs and Its Implication for CO₂ Sequestration

Impact of Supercritical CO₂ on Shale Reservoirs and Its Implication for CO₂ Sequestration

Pore Structure and Adsorption Characteristics of Maceral Groups: Insights from Centrifugal Flotation Experiment of Coals

Development and Application of Converter COMI-B Technology: A New Way of CO<sub>2</sub> Utilization

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Understanding initial opportunities and key challenges for CCUS deployment in India at scale

Cited by 56 publications

References 186 publications

Impact of Supercritical CO2 on Shale Reservoirs and Its Implication for CO2 Sequestration

Impact of Supercritical CO2 on Shale Reservoirs and Its Implication for CO2 Sequestration

Pore Structure and Adsorption Characteristics of Maceral Groups: Insights from Centrifugal Flotation Experiment of Coals

Development and Application of Converter COMI-B Technology: A New Way of CO<sub>2</sub> Utilization

Contact Info

Product

Resources

About

Impact of Supercritical CO₂ on Shale Reservoirs and Its Implication for CO₂ Sequestration

Impact of Supercritical CO₂ on Shale Reservoirs and Its Implication for CO₂ Sequestration