Article
Thermodynamics
Sanehiro Muromachi, Kiyofumi Suzuki, Norio Tenma
Summary: This study reports phase equilibrium data for urea + methane + water and urea + carbon dioxide + water systems, and finds that urea can be used as a thermodynamic hydrate inhibitor in subsea methane hydrate systems. The inhibition effect of urea is slightly weaker than that of methanol, but it can reach applicable hydrate inhibition temperatures under specific conditions. Based on the present equilibrium data and seafloor conditions, urea can be used for methane gas production and hydrate-based carbon capture and storage systems.
FLUID PHASE EQUILIBRIA
(2023)
Article
Energy & Fuels
Saeid Sinehbaghizadeh, Agus Saptoro, Sepideh Amjad-Iranagh, Angnes Ngieng Tze Tiong, Amir H. Mohammadi
Summary: This study investigated the intermolecular mechanisms of CO2 and NF3 hydrates using molecular dynamics simulation and evaluated the stability of CO2 hydrates in the presence of different thermodynamic hydrate promoters. Results showed that NF4 had a higher propensity to form nanobubbles and partially occupied hydrates had a higher concentration distribution. The type of large molecular guests in the large cages played a major role in stabilizing the clathrate hydrate network.
Article
Agriculture, Dairy & Animal Science
Sean M. McGinn, Jean-Francois Coulombe, Karen A. Beauchemin
Summary: This study compared different methods of measuring methane and carbon dioxide emission rates, showing that the GreenFeed system accurately estimated cattle emissions over a short period of time, although additional factors would need to be taken into account for determining the 24-hour emission rate.
JOURNAL OF ANIMAL SCIENCE
(2021)
Article
Chemistry, Physical
Navid Saeidi, Derek Dunn-Rankin, Bjorn Kvamme, Yu-Chien Chien
Summary: The research investigates the dynamic rate limiting steps in the dissociation of methane hydrates and the formation of CO2 hydrates, with results suggesting that CO2 injection and substitution can effectively and environmentally sensitively produce hydrates. Different experimental conditions show that the addition of N-2 can increase CH4 release, but pure CO2 injection alone cannot generate effective hydrate substitution.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Engineering, Environmental
Christy M. Dykstra, Spyros G. Pavlostathis
Summary: This study investigated the effect of hydrogen sulfide addition to the cathode headspace on the performance of methanogenic bioelectrochemical systems (BESs). The results showed that low concentrations of H2S can increase methane production, but higher concentrations can lead to inhibition. The transport and oxidation of sulfide in the anode were found to play a crucial role in methanogenic BESs treating sulfide-bearing biogas.
Article
Thermodynamics
Haolei Yang, Xiaoqiang Bian, Lianguo Wang
Summary: A new association model, CPA-MHV1, combining the SRK equation of state with the CPA equation based on Michelsen's improved Huron-Vidal mixing rule, is developed. The model is used to investigate the vapor-liquid equilibrium of binary mixtures involving CH4, CO2, and H2O, as well as ternary mixtures containing NaCl. The results show that considering the solvation between CO2 and H2O yields the best performance, while CH4 with a pseudo-association scheme has the highest comprehensive prediction performance.
FLUID PHASE EQUILIBRIA
(2024)
Article
Chemistry, Multidisciplinary
Sirisha Nallakukkala, Hani Abulkhair, Abdulmohsen Alsaiari, Iqbal Ahmad, Eydhah Almatrafi, Omar Bamaga, Bhajan Lal, Azmi Mohd Shariff
Summary: This study analyzed the suitability of methane, carbon dioxide, and propane for hydrate formation, and concluded that CO2-C3H8 is the preferred hydrate former for hydrate-based desalination.
Article
Chemistry, Multidisciplinary
Po-Wei Wang, David T. Wu, Shiang-Tai Lin
Summary: Urea is revealed as a kinetic promoter for the growth of CO2 hydrates, playing a key role in increasing mass transport of CO2 and catalyzing cage formation at the solid-liquid interface according to molecular dynamics simulations.
CHEMICAL COMMUNICATIONS
(2021)
Article
Optics
Fupeng Wang, Jinghua Wu, Yaopeng Cheng, Liyan Fu, Jianguo Zhang, Qiang Wang
Summary: In this study, a miniaturized differential photoacoustic cell is designed for the detection of CH4 and CO2. A new dual differential method is proposed to enhance the photoacoustic signal. The sensitivity of the detection is further improved by employing distributed feedback lasers and wavelength modulation spectroscopy.
Article
Engineering, Chemical
Sean M. W. Wilson, Sebastien Barrette
Summary: This study investigates the performance of six commercially available activated carbons and one carbon aerogel for the removal of CO2 from biogas during biogas upgrading using pressure swing adsorption. The results suggest that carbon intrinsic properties such as pore size, surface area, %oxidation, and ash content play a role in CO2 removal. Carbons with smaller pore size distribution, higher %oxidation, and higher %ash content are found to be beneficial for CO2 separation. NZ-AC, M-30, and ACC are identified as potential porous carbons with favorable intrinsic properties for CO2 separation from biogas.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Andre Bolt, Ibrahim Dincer, Martin Agelin-Chaab
Summary: This study presents a novel multigeneration system that combines solar and wind energy to store thermal energy, capture carbon dioxide emissions from steel production, and produce electricity, space heating, methane, hydrogen gas, and freshwater. The system demonstrates high energy and exergy efficiencies.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Maria Dolores Robustillo, Davi Eber Sanches de Menezes, Pedro de Alcantara Pessoa
Summary: The increasing energy demand in the world has led to the consideration of methane hydrates as a potential alternative to oil, gas, and coal. Carbon capture through hydrate formation is seen as a possible pathway for decarbonization due to concerns about climate change. This study provides new experimental data on the dissociation temperatures of double-guest clathrates at high pressure, specifically investigating binary mixtures of methane and low-molecular-weight gases. The experimental results were successfully modeled, and the impact of different guest species on hydrate structure and thermodynamic properties was discussed.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Review
Agricultural Engineering
Jihee Yoon, Min-Kyu Oh
Summary: The biosynthesis of PHAs from C1 gases offers a promising solution to climate change and microplastic pollution, as it can reduce production costs and environmental impact associated with petroleum-based plastics. Autotrophs, acetogens, and methanotrophs are strains capable of producing PHA from CO2, CO, and CH4, demonstrating the potential for using costless C1 gases as sustainable carbon sources for bioplastic production.
BIORESOURCE TECHNOLOGY
(2022)
Article
Thermodynamics
Hassan Pahlavanzadeh, Ali Eslamimanesh, Amirreza Ghavi
Summary: This study investigates the phase equilibria of CO2 gas hydrates in the presence of tetra n-butyl phosphonium bromide (TBPB) and tetrahydrofuran (THF). The experiments were conducted using the isochoric pressure search method with varying compositions of promoters. The results show that the addition of TBPB and THF into the system changes the hydrate phase equilibrium conditions. At low concentrations of THF, the promotion effect of TBPB is low, but at higher concentrations of THF, the equilibrium pressure of the hydrates decreases significantly.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Thermodynamics
James R. DuQuesnay, Maria Carolina Diaz Posada, Juan G. Beltran
FLUID PHASE EQUILIBRIA
(2016)
Article
Energy & Fuels
Shefaza Esmail, Juan G. Beltran
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2016)
Editorial Material
Thermodynamics
Juan G. Beltran
JOURNAL OF CHEMICAL THERMODYNAMICS
(2018)
Article
Thermodynamics
Lisa U. Udegbunam, James R. DuQuesnay, Laura Osorio, Virginia K. Walker, Juan G. Beltran
JOURNAL OF CHEMICAL THERMODYNAMICS
(2018)
Article
Engineering, Chemical
Sebastien Bergeron, Juan G. Beltran, Arturo Macchi, Phillip Servio
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2010)
Article
Chemistry, Multidisciplinary
Juan G. Beltran, Phillip Servio
CRYSTAL GROWTH & DESIGN
(2010)
Article
Thermodynamics
Hallvard Bruusgaard, Juan G. Beltran, Phillip Servio
FLUID PHASE EQUILIBRIA
(2010)
Article
Energy & Fuels
Sebastien Bergeron, Juan G. Beltran, Phillip Servio
Article
Thermodynamics
Juan G. Beltran, Hallvard Bruusgaard, Phillip Servio
JOURNAL OF CHEMICAL THERMODYNAMICS
(2012)
Article
Engineering, Chemical
Sebastian Ovalle, Camilo Martinez, Luna Bonilla, Andres Lara, Juan G. Beltran
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2019)
Article
Energy & Fuels
Narendra Kumar, Niaz Bahar Chowdhury, Juan G. Beltran
Article
Thermodynamics
Sebastian Ovalle, Juan G. Beltran
Summary: Research shows that gas hydrates of pure propane and methane + propane mixture exhibit different crystal morphologies under different conditions, and the methane content also leads to significant changes in crystal shapes. A new hydrate growth mechanism involving partial dissociation of crystals in propane and propane + methane hydrates has been reported.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Energy & Fuels
Sebastian Ovalle, Camilo Martinez, Juan G. Beltran
Summary: Gas hydrates are a major concern in oil and gas pipelines as they can cause blockages and pose safety risks. Understanding the surface behavior of gas hydrates is crucial in flow assurance. The study presents observations on the morphology and phase boundary behavior of hydrates formed by different gas compositions. It was found that the growth and propagation of hydrates were influenced by the gas composition and driving force, with liquid water playing a significant role in halo growth.
Article
Engineering, Chemical
Sebastian Ovalle, Camilo Martinez, Juan G. Beltran
Summary: The HLV equilibrium conditions of two ternary gas mixtures were investigated in this study, and it was found that the long experimental times pose a challenge for multicomponent systems. The technique used in this research bypasses these limitations and provides fast and reproducible HLV equilibrium data for gas-dominated systems.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
