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Research Article
Sodium Dodecyl Sulfate and Calcium Hydroxide Exhibit a Synergistic Effect in Promoting the Formation of Carbon Dioxide Hydrate
Yaxiong Yang
,
Yuxin Jia,
Xiaolong Zhu,
Lei Yang*,
Yongchen Song
Issue:
Volume 11, Issue 3, June 2026
Pages:
46-58
Received:
13 April 2026
Accepted:
20 April 2026
Published:
8 May 2026
Abstract: The continuous increase in carbon dioxide (CO2) emissions has raised serious environmental concerns, highlighting the urgent need for efficient carbon capture, utilization, and storage (CCUS) technologies. Among the available approaches, CO2 hydrate-based sequestration has attracted significant attention due to its high gas storage capacity, mild operating conditions, and environmental compatibility. However, its practical application remains hindered by slow formation kinetics, long induction times, and low gas consumption efficiency. In this study, a novel synergistic promotion strategy was proposed to simultaneously enhance both the formation kinetics and gas storage performance of CO2 hydrates. Calcium hydroxide (Ca(OH)2) was introduced as a reactive additive, which reacts with CO2 to generate calcium carbonate (CaCO₃) particles in situ. These CaCO₃ particles effectively shorten the hydrate induction period by providing favorable nucleation sites. Meanwhile, sodium dodecyl sulfate (SDS), a typical surfactant, was employed to modify the surface properties of CaCO₃ particles. The adsorption of SDS onto the CaCO₃ surface enhances its hydrophobicity, thereby improving gas–liquid contact and promoting hydrate nucleation and growth. The experimental results demonstrate that the addition of Ca(OH)2 or SDS alone significantly reduces the induction time by up to 91.4% and 82.98%, respectively, compared with pure water. However, their effects on hydrate formation rate and gas consumption are limited. In contrast, the combined SDS–Ca(OH)2 system exhibits a pronounced synergistic effect. The induction time is reduced by 88.16%, while the hydrate formation rate and gas consumption are significantly enhanced by 739.13% and 276.19%, respectively. This study provides an effective and promising strategy for improving CO2 hydrate formation performance, offering strong potential for large-scale applications in carbon capture and storage.
Abstract: The continuous increase in carbon dioxide (CO2) emissions has raised serious environmental concerns, highlighting the urgent need for efficient carbon capture, utilization, and storage (CCUS) technologies. Among the available approaches, CO2 hydrate-based sequestration has attracted significant attention due to its high gas storage capacity, mild...
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Research Article
Analyse Sri Lanka's Visiting the Attractions Industry and Providing Key Economic Data for the Nation Between 2019 and 2024, as Well as Forecasts for 2025
Emusb Ekanayake*
Issue:
Volume 11, Issue 3, June 2026
Pages:
59-73
Received:
5 November 2025
Accepted:
20 November 2025
Published:
4 June 2026
Abstract: With forecasts for 2025, this comprehensive analysis report looks at Sri Lanka's hospitality industry from 2019 to 2024. The report provides an overview of market trends, opportunities, challenges, and key industry segments. Government programs, rising business travel, and tourism have all contributed to Sri Lanka's hospitality sector's recent notable expansion. The sector is anticipated to directly contribute billions of dollars to the Gross Domestic Product (GDP) by 2025. Given the substantial contribution of tourism to Sri Lanka's GDP and employment, it is susceptible to various crises, necessitating accurate forecasting of visitor arrivals. The study's main contributions are the identification of Sri Lankan tourist destinations and the provision of insightful and creative viewpoints on them. According to this study, foreign visitors are expected to generate over $100 billion in revenue in the future. In order to improve sustainability, the industry is also putting policies like renewable energy, green building standards, and energy efficiency into place. Additionally, domestic travel is significant; over a million domestic trips are anticipated in the future. Finally, a greater proportion of people are expected to travel online in the future, indicating that the market for online travel will continue to grow. This research predicts data for the nation between 2019 and 2024, as well as forecasts for 2025 using Excel software and gives Sri Lankan destinations and detailed information on hotels and other rooms. This one is very important for indoor/outdoor, local, and foreign tourists. Finally, the finding validates the need for government involvement in promoting and increasing international tourism demand to attain sustainable growth and development in the industry.
Abstract: With forecasts for 2025, this comprehensive analysis report looks at Sri Lanka's hospitality industry from 2019 to 2024. The report provides an overview of market trends, opportunities, challenges, and key industry segments. Government programs, rising business travel, and tourism have all contributed to Sri Lanka's hospitality sector's recent nota...
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Research Article
The UK Economy and Oil Price Shocks: An Empirical Assessment Under the New Keynesian Framework
Vivek Singh Chauhan*
Issue:
Volume 11, Issue 3, June 2026
Pages:
74-96
Received:
9 February 2026
Accepted:
25 February 2026
Published:
18 June 2026
DOI:
10.11648/j.ijeee.20261103.13
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Views:
Abstract: This study investigates the macroeconomic effects of the global oil price shocks on the United Kingdom from 2004 to 2024 within the framework of the New Keynesian (NK) model for small open economies. Employing reduced-form VAR and SVAR approaches, we analyse the dynamic responses of real GDP, inflation, the interest rate, and the real exchange rate to exogenous oil price movements. Beyond interpreting these effects, the study critically assesses how closely real-world outcomes align with NK model predictions. From VAR analysis, our findings (by interpretating impulse-response functions) largely validate the NK framework. For a positive oil price shock, it results in cost-push inflation by raising firms' marginal production costs. Inflation increases persistently in the short to medium term, while output contracts due to declining real income and tighter financial conditions. Monetary policy responds endogenously through interest rate hikes aimed at stabilizing inflation expectations, amplifying short-run output losses. The real exchange rate depreciates following adverse oil shocks, reflecting both deteriorating trade conditions and monetary tightening dynamics. While findings largely validate the NK model's qualitative implications, the study has its own diagnostic limitations such as non-normal residuals and model simplification. Overall, the study provides contribution to empirical evidence validating the relevance of the NK model framework, particularly for understanding oil price shocks to an open small economy.
Abstract: This study investigates the macroeconomic effects of the global oil price shocks on the United Kingdom from 2004 to 2024 within the framework of the New Keynesian (NK) model for small open economies. Employing reduced-form VAR and SVAR approaches, we analyse the dynamic responses of real GDP, inflation, the interest rate, and the real exchange rate...
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