Gas Hydrate: Environmental and Climate Impacts

Tinivella, Umberta; Giustiniani, Michela; Vargas-Cordero, Iván; Vasilev, Atanas

doi:10.3390/geosciences9100443

Cited by 7 publications

(5 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The yellow precipitate was analysed using Raman spectra (refer Figure 8(a)) and significant peaks were observed at 153 cm -1 , 220 cm -1 and 473 cm -1 , while the remaining peaks at around 433, 245, and 191 cm -1 were minor peaks. The peak obtained from the solid precipitate was compared with the peak produced by octasulphur (S8), and it was confirmed that the solid precipitate formed was sulphur [3,8,17]. The other peaks were attributed to the catalytic DES used in the process.…”

Section: Oxidative Oxidationmentioning

confidence: 85%

“…Wang et al, [2] has reported that in the BRICS Energy Report as shown in Figure 1, that the use of fossil fuel particularly coal and oil, is expected to decrease overall [1]. However, natural gas is expected to grow due to its relatively smaller carbon footprint compared to other fossil fuels [3]. This trend has led to the development of solutions that are both environmentally friendly and viable for industrial use.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Formulation of Catalytic Deep Eutectic Solvent for H2S Oxidative Absorption at Ambient Condition with Assistance of Cosmo-Rs

Nor Fariza Abd Mutalib,

Muhammad Shazwan Shabani,

Mohamad Azmi Bustam

2024

ARASET

View full text Add to dashboard Cite

H2S is very well known for its toxicity, corrosivity, flammability and explosiveness which in overall lead to operational difficulty. Hence, raising the need for H2S sweetening process. However, the current conventional sweetening process is very energy intensive besides suffer from catalyst deactivation issue. Therefore, raising the need for more environmentally and economical friendly approach such as utilizing green solvent like deep eutectic solvent. Thus, the objective of this research is to determine the best combination of HBD and HBA components for catalytic DESs to convert H2S at room temperature. The study utilized COSMO-RS computational to assist in selecting the appropriate components, synthesized and characterized the chosen catalytic DES, and performed oxidative absorption of H2S using the selected DES. Initially, the solubility and selectivity performance of various HBD and HBA were evaluated, and the components with the best performance were combined with CuCl2.2H2O to form catalytic DES. The synthesized catalytic DES was characterized using FTIR and tested for its oxidation absorption capability. Based on the COSMO-RS screening, 1-butyl-3-methylimidazoilum chloride [bmim][Cl] and ethylene glycol [EG] were determined to be the best HBD and HBA, respectively. The catalytic DES formed from these components was homogeneous and brown in colour. The results of oxidative absorption showed that the catalytic DES rapidly produced a yellow precipitate, which was later confirmed to be sulphur. The study concludes that COSMO-RS computational can be used to formulate DESs for H2S oxidative absorption, and catalytic DES maintained its properties before and after H2S oxidation. The research also suggests that oxidative absorption of H2S to sulphur using catalytic DESs is a feasible and rapid.

show abstract

Section: Oxidative Oxidationmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Formulation of Catalytic Deep Eutectic Solvent for H2S Oxidative Absorption at Ambient Condition with Assistance of Cosmo-Rs

Nor Fariza Abd Mutalib,

Muhammad Shazwan Shabani,

Mohamad Azmi Bustam

2024

ARASET

View full text Add to dashboard Cite

show abstract

“…The formation of gas hydrates in permafrost has been explained in several models based on field data and calculations. − The presence of gas hydrates in shallow permafrost within 150 m has been inferred from field data and some implicit indicators. , Methane gas hydrates may exist in the metastable zone , in frozen sediments above the zone of hydrate stability. They are remnant (relict) gas hydrates that formed earlier in frozen sediments under more favorable thermobaric conditions, became metastable in the course of later paleoclimatic events and permafrost evolution, and have survived as a result of the self-preservation effect. − The relict (metastable) shallow gas hydrates are prone to destabilization, being especially sensitive to environmental changes that lead to decompression, warming, and migration of saline waters or brines. , The stability loss and dissociation of gas hydrates may induce emission of methane into the atmosphere and, thus, contribute additionally to the greenhouse effect and global change. − The linkage of methane emission from bottom sediments with dissociation of gas hydrates can been associated for several areas of the Russian Arctic shelf, − although most of such evidence remain implicit. ,, …”

Section: Introductionmentioning

confidence: 99%

Pressure Influence on Salt Migration in Frozen Hydrate-Saturated Sediments: Experimental Modeling

et al. 2022

View full text Add to dashboard Cite

Development of the Arctic region faces many problems, including methane emission from permafrost. Among other causes, methane emission may result from destabilization and dissociation of intrapermafrost gas hydrates under temperature and pressure changes or chemical reactions. The effects of the temperature and pressure on the stability of intrapermafrost gas hydrates have been quite well-studied, but the chemical effects, such as migration of salts, remain poorly understood. In this study, the interaction of frozen hydrate-saturated sediments with NaCl solutions is simulated in physical experiments at different gas pressures from 0.1 to 4.0 MPa and at a constant negative temperature of around −6.0 °C. The experiments show that the external pressure significantly affects the migration of Na+ into frozen hydrate-bearing sand: salt transport accelerates at lower pressures, while pore hydrates lose stability. However, the effect of the pressure on frozen hydrate-free sediments is minor. The experimental results make a basis for a model of pore space changes in frozen hydrate-saturated rocks interacting with salt water under gas pressures above or below the equilibrium value.

show abstract

“…The exploration process faces serious drilling risks caused by the deep-water environment. Due to the appropriate temperature and pressure which meet the conditions for gas hydrate formation in deep-water oil and gas exploitation, gas hydrate formation in drilling pipelines has been a major problem which strictly restricts the safe and efficient exploitation of deep-water oil and gas. − …”

Section: Introductionmentioning

confidence: 99%

Investigation on Methane Hydrate Formation in Water-based Drilling Fluid

Zhang

et al. 2021

Energy Fuels

View full text Add to dashboard Cite

To guarantee the flow assurance of drilling fluid in deep-water drilling, the inhibitory effect of PVP-K90 on methane hydrate formation was measured at 275.15 and 277.15 K with an initial pressure of 6, 8, and 10 MPa. The effect of PVP-K90 on the rheological properties of drilling fluid was also measured. Results showed that the apparent viscosity enhanced from 27 and 114 mPa•s as the concentration of PVP-K90 increased up to 2.0 wt %, which greatly weakened the fluidity of the drilling fluid. However, the addition of PVP-K90 showed a positive effect on prolonging the hydrate nucleation time and reducing the methane consumption in hydrate growth. The mean induction time of gas hydrate formation at 277.15K with the addition of 1.0 wt % PVP-K90 into the drilling fluid was at least 3 times higher than that without the addition of 1.0 wt % PVP-K90. The initial methane consumption rate and total methane consumption were reduced evidently with the increasing concentration of PVP-K90. In addition, increasing the temperature was also suggested to enhance the inhibitory effect on hydrate formation. Therefore, considering the influence of PVP-K90 on the fluidity of drilling fluid and the inhibitor effect of hydrate formation, 1.0 wt % PVP-K90 was thought to be a suitable concentration for the prevention of methane hydrate formation in drilling fluid at subcooling of less than 4.5 K. These observations have special significance for water-based drilling fluid with hydrate inhibition performance design in deep-water drilling.

show abstract

Gas Hydrate: Environmental and Climate Impacts

Cited by 7 publications

References 48 publications

Formulation of Catalytic Deep Eutectic Solvent for H2S Oxidative Absorption at Ambient Condition with Assistance of Cosmo-Rs

Formulation of Catalytic Deep Eutectic Solvent for H2S Oxidative Absorption at Ambient Condition with Assistance of Cosmo-Rs

Pressure Influence on Salt Migration in Frozen Hydrate-Saturated Sediments: Experimental Modeling

Investigation on Methane Hydrate Formation in Water-based Drilling Fluid

Contact Info

Product

Resources

About