Recent Advances on Carbon Dioxide Capture through a Hydrate-Based Gas Separation Process

Hydrate Based Gas Separation (HBGS) process is gaining interest globally as a greener solution for separation of CO2 from gaseous streams. In this paper, recently published articles on the development of HBGS process as a technique for separation of CO2 from flue gas, feed gas and high CO2 natural gas streams are briefly reviewed

Separation of Carbon Dioxide and Methane via Hydrate Formation with Utilization of Modified Spray Reactor and Thermodynamic Promoters

Pemanasan global dan perubahan iklim telah menggalakkan negara-negara untuk mengurangkan kepekatan karbon dioksida dalam atmosfera. Penangkapan C02 adalah satu langkah penting untuk mengurangkan pelepasan gas rumah hijau

Experimental Evaluation of Chemical Reactions Involved in Ultrasonic-Assisted Absorption of Bulk CO2

As the most mature natural gas sweetening process, absorption has always been improved to meet the separation requirement. Recently, ultrasonic irradiation has been proposed as a technique that can intensify CO2 absorption. However, further studies are still required, particularly focusing on the sonochemical effect. Since the influence of the sonochemical effect on the reaction pathway is still debatable, attention must be given to verifying the influence of ultrasonic irradiation on the chemical reactions of CO2 absorption. Hence, this work aims to evaluate the influence of OH˙ radicals generated by the sonochemical effect on the chemical reactions involved during CO2 absorption using promoter-free methyldiethanolamine (MDEA). For the evaluation, various samples under irradiated and non-irradiated conditions are analyzed using the HPLC characterization technique. The results show that the hypothesis of changing the reaction pathway due to the presence of the sonochemical effect is invalid. However, it can accelerate the generation of hydroxyl radicals (OH˙) via water sonolysis. Thus, the origin of sonochemistry in aqueous solutions is defined as water sonolysis. The analysis of the CO2 absorption rate also demonstrates the presence of accelerated chemical reactions (contributed by the OH˙ radicals), which could potentially make the slow kinetic MDEA more practical for industrial application

Investigation of the task oriented dual function inhibitors in gas hydrate inhibition: A review

Recent advances in gas hydrate research mainly focus on dual function gas hydrate inhibitors (DF-GHIs). DF-GHIs exhibit dual behavior of shifting the hydrate dissociation curve to lower temperatures and higher pressures as well as hindering or delaying the nucleation. The main focus of this review is to discuss all the possible factors that can induce dual functionality in gas hydrate inhibitors (GHIs). In this regard, this review summarizes the latest developments, classification, evaluation techniques and experimental findings of GHIs. The experimental data of different research groups is critically analyzed and systematically evaluated in terms of average depression temperature (ΔŦ) and relative inhibition power (RIP). The ΔŦ and RIP is calculated from existing experimental data. The studies in this field will give more knowledge at both academic and industrial level for the development of economical, efficient and biodegradable DF-GHIs

Experimental Investigation of Novel Green Solvents for Improving Oil Recovery through Interfacial Tension

Abstract The rise in demand for energy forces us to extract oil as much as possible. A variety of methods should be used for that categorized as primary, secondary, and tertiary techniques. Tertiary methods known as enhanced oil recovery (EOR) have been applied mostly to maturing reservoirs. To implement more efficient EOR methods, new materials and technologies should be used. Ionic liquids (IL) were highly regarded for chemical EOR in the last decade until researchers raised concerns about their cost, and environmental impacts. Recently, deep eutectic solvents (DES) were discovered and known as a potential replacement for ILs due to their non-toxic nature, biodegradable, non-flammable nature, and cost. In this study, the effectiveness of DES is investigated by observing its ability to change Interfacial tension (IFT). The studies included the effects of pressure, temperature, salinity, and concentration. The optimum salinity point was obtained as 100000ppm and after that the effect was minimal. The IFT changes with pressure change were negligible, while temperature proved to be the most affecting parameter. Overall, the study suggests that IFT changes using DES in the chemical EOR method for light crudes will not be a limiting factor at reservoir conditions.</jats:p

Impact of gas phase composition on gas hydrate process for carbon dioxide capturing from gaseous mixtures

Hydrate based technology is a promising new process for separation of Carbon dioxide from different gas mixtures. The process is claimed to be less energy intensive, green and low technology. In this article effect of composition on the efficiency of such process is discussed. CSMGem software is used for analysis. Results shows that gas phase composition have important impact on the efficiency of process.</jats:p