Article
Engineering, Chemical
Boor Singh Lalia, Abdullah Khalil, Raed Hashaikeh
Summary: Novel electrochemical process demonstrated selective separation and recovery of calcium and magnesium from brine, highlighting importance for environmental protection and resource utilization.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Energy & Fuels
Hakki Aydin, Serhat Akin
Summary: This study uses CO2 dissolution experiments to simulate CO2 dissolution behavior under reservoir conditions and obtains consistent results with literature and models through experimental setups and chemical tests. The study also investigates the effects of water salinity and gas impurities on CO2 dissolution, as well as the kinetics of CO2 dissolution and the pressure behavior of gas-brine mixtures. The novelty of the study lies in using real reservoir gas and brine for experiments, providing significant insights for CO2 sequestration in geothermal reservoirs.
Review
Chemistry, Multidisciplinary
Shweta Tripathi, Sonia Choudhary, Alok Meena, Krishna Mohan Poluri
Summary: Global warming is caused by the increase of atmospheric carbon dioxide levels, which requires sustainable methods to capture carbon. This review focuses on carbon capture, usage, and storage with microalgae, highlighting methods to enhance carbon dioxide uptake, combining wastewater and flue gases, using machine learning for strain identification, implementing artificial intelligence and automation, and promoting the circular bioeconomy. Various techniques, such as modified photobioreactors, membranes, chemical methods, solvents, adapted strains, genetically engineered strains, omics, and nanotechnology, can improve the carbon dioxide uptake by microalgae. Furthermore, the economic viability of microalgae-based carbon capture and bioenergy production is discussed. On average, cultivating microalgae on 13 million acres of land can sequester approximately 0.5 gigatons of CO2 and generate over 300 tons of biomass.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Energy & Fuels
Lanlan Jiang, Yue Wang, Guohuan Lu, Jinguang Yang, Yongchen Song
Summary: Carbon capture and storage technology is crucial for reducing CO2 emissions worldwide. In this study, convective mixing experiments between CO2 and saline showed that high pressure and low salinity conditions can promote mixing and enhance the dissolution of CO2, leading to higher efficiency.
Article
Energy & Fuels
Sivachidambaram Sadasivam, Shakil Masum, Min Chen, Kamil Stanczyk, Hywel Thomas
Summary: This study explores the CO2 adsorption-desorption kinetics of bituminous coal under low pressure injection and compares different models to fit the data. The results suggest that bulk pore diffusion, surface interaction, and multilayer adsorption are the rate-determining steps.
Article
Crystallography
Asif Ali, Catarina E. Mendes, Leonardo G. T. C. de Melo, Jinsheng Wang, Rafael M. Santos
Summary: This study investigates the co-utilization of saline brine and carbon capture, utilization, and sequestration (CCUS) for the production of sodium bicarbonate. A modified Solvay process is proposed to replace the use of ammonia in the traditional process. The addition of Ca(OH)(2), KOH, and NH4HCO3 as buffering additives is compared, and it is found that NH4HCO3 and KOH perform better in producing high-purity NaHCO3. Geochemical modeling is used to understand the behavior of reactions, and accurate characterization is crucial for assessing the success of modified Solvay processes.
Article
Engineering, Environmental
Xiaohui Chen, Changcheng Ma, Huimei Zhou, You Liu, Xiaoman Huang, Mingkuang Wang, Yuanyang Cai, Da Su, Muhammad Atif Muneer, Mengchu Guo, Xuanji Chen, Yuan Zhou, Yong Hou, Wenfeng Cong, Jiuxin Guo, Wenqi Ma, Weifeng Zhang, Zhenling Cui, Liangquan Wu, Shungui Zhou, Fusuo Zhang
Summary: This study analyzed the carbon emissions and sequestration inventories, as well as the carbon footprint of 16 major crop systems in China from 2001 to 2018. Vegetables and tea were found to have the highest carbon footprints. Fertilization and irrigation were identified as key factors contributing to the increase in net carbon emissions, with reducing nitrogen loss being the most effective strategy for mitigating agricultural greenhouse gas emissions in the future.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Multidisciplinary Sciences
Yu Jing, Aaron Uthaia Kumaran, Damion Howard Read Stimson, Karine Mardon, Ljubco Najdovski, Ryan T. Armstrong, Peyman Mostaghimi
Summary: This study develops a novel laboratory protocol using PET imaging technology and [C-11]CO2 as a tracer to visualize and quantify in-situ CO2 adsorption, spreading, diffusion, and advection flow in coal.
Article
Mathematics
Longjun Dong, Lingyun Zhang, Huini Liu, Kun Du, Xiling Liu
Summary: The b value of acoustic emission is an important parameter for predicting rock fractures. This study analyzed the changes in b value during rock failure and investigated the characteristics of acoustic emission events. The results showed that b value calculated using the average amplitude had higher accuracy, and an interval of event counts of 200 was suggested for b value calculations. The study also found that the b value decreased before fracture and decreased with increasing confining pressure.
Article
Energy & Fuels
Guozhu Wang, Lei Song, Qirui Wang, Zhuangcai Tian, Junqi Fan, Yu Wang, Jianwei Ren, Weihao Yang, Haipeng Li, Mingwei Zhang, Honglei Shen
Summary: This study investigated the mechanical properties and permeability evolution of sandstone under different confining and seepage pressures using triaxial compression tests. The results showed that the confining pressure and seepage pressure have opposite effects on the strength and permeability of sandstone. Cumulative acoustic emission counts can be used to predict the permeability evolution process of sandstone.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Construction & Building Technology
Inderjeet Singh, Rotana Hay, Kemal Celik
Summary: The study investigated the direct carbonation of brucite recovered from reject brine and observed significant improvement in mechanical properties post-carbonation. Findings suggest that cost-effective synthesis of brucite from reject brine could sequester CO2, making it a promising material for the construction industry.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Mechanics
Ming Lan, Ying Tang, Ju Ma, Zhi-xiang Liu
Summary: In this study, cooperative event localization and velocity tomography were used to investigate the travel path of acoustic emission waves under anisotropic conditions and the evolution of wave velocity during triaxial loading. The results showed that the wave velocity field remained relatively stable when the maximum principal stress was below 16 MPa, but exhibited a discernible upward trend with increasing maximum principal stress, particularly after reaching the 40 MPa threshold.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Construction & Building Technology
Rong Chen, Baolong Zhu, Jing Li
Summary: By analyzing the chemical composition and micro-structures of Jiuzhaigou travertine, this study found that the travertine samples are primarily composed of calcite and have porous micro-structures. Their failure mode is mainly single-sided shear failure, and increasing confining pressure significantly increases their axial deformation and peak strengths. The mechanical properties of travertine samples fall between sandstone and clay, and the proposed model and experimental data have good agreement.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Kenneth P. Helmold, David L. LePain
Summary: Recent hydrocarbon discoveries in the Nanushuk Formation have sparked interest in exploring the Colville basin in Alaska. The formation consists of marine and nonmarine strata that were deposited by two deltaic complexes. The reservoir quality varies across the North Slope, with differences in porosity and permeability controlled by depositional texture and burial depth.
MARINE AND PETROLEUM GEOLOGY
(2023)
Review
Energy & Fuels
Cheng Zhang, Milei Wang
Summary: The translation paragraph introduces the importance of interfacial tension (IFT) between CO2 and brine in geological CO2 storage (GCS), and provides a systematic review of the current research on the IFT of CO2/brine system, including experimental methods, data, and influencing factors.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Geological
K. M. A. S. Bandara, P. G. Ranjith, W. G. P. Kumari
Summary: The study revealed that fractures generated in shale and siltstone formations during hydraulic fracturing exhibit different characteristics, and flow behavior is influenced by factors such as fracture tortuosity and proppant concentration.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Environmental
Yi Xue, Jia Liu, P. G. Ranjith, Zhizhen Zhang, Feng Gao, Songhe Wang
Summary: This study conducted triaxial compression tests on coal under different gas pressure conditions to explore the influence mechanism of gas pressure on coal deformation, failure, and energy evolution. The mechanical properties, acoustic emission energy characteristics, and nonlinear characteristics of coal containing gas were obtained based on the test data. A theoretical formula for analyzing energy evolution was introduced and verified by test data. The research results indicate that energy rate can be used as a new effective mechanical parameter to analyze and predict the damage and failure characteristics of coal. The findings on energy dissipation characteristics and the defined ratio of dissipative energy rate and input energy rate provide insights for understanding the fracturing evolution and energy driving mechanism of coal.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Construction & Building Technology
M. H. Samarakoon, P. G. Ranjith, W. A. M. Wanniarachchi
Summary: This study examines the effects of carbonation on the properties and mechanisms of cement, showing that alkali-activated cements with higher calcium content exhibit better mechanical properties and a denser microstructure when exposed to carbonate brine.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Thermodynamics
Jizhao Xu, Cheng Zhai, Pathegama Gamage Ranjith, Shuxun Sang, Yong Sun, Yuzhou Cong, Wei Tang, Yangfeng Zheng
Summary: The study investigated the effects of liquid CO2 on coal strength, finding that the coupled effects of liquid CO2 temperature and adsorption can influence coal fracture behavior and crack morphology.
Article
Energy & Fuels
Jizhao Xu, Cheng Zhai, P. G. Ranjith, Shuxun Sang, Xu Yu, Yong Sun, Yuzhou Cong, Yangfeng Zheng, Wei Tang
Summary: The study found that coal affected by liquid CO2 exhibited more complex destruction patterns, larger fractal dimensions, and greater structure degradation. The affected coals showed diverse mechanical responses, with temperature shock and CO2 adsorption potentially leading to crack growth and strength deterioration, ultimately destroying the coal with smaller yield strength.
Article
Energy & Fuels
David Lall, Vikram Vishal, M. V. Lall, P. G. Ranjith
Summary: The study found that gas production was less efficient in the presence of a permeable heterogeneity compared to other scenarios. The permeability affects the vertical extent of dissolved methane volume during thermal stimulation and huff and puff, while well depth influences the radial extent of dissociated molecules.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Geological
Chunlin Zhong, Zhenyu Zhang, P. G. Ranjith, Chengpeng Zhang, Kangsheng Xue
Summary: The study found that pore water can affect the radial and volumetric strain evolution of coal, leading to dilation deformation. Additionally, due to the water propping effect, the cracks in saturated coal cannot close tightly during loading, causing sliding and generating numerous tensile cracks. Loading frequency can impact the decay of pore pressure, consequently influencing the number of cracks in coal.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Energy & Fuels
Shashika Gajanayake, Ranjith Pathegama Gamage, Pabasara Wanniarachchige, Decheng Zhang
Summary: This study conducted molecular dynamic simulations to investigate the effects of temperature, pressure, and initial CO2 concentration on gas replacement characteristics for methane recovery and CO2 storage. The results showed that higher temperatures resulted in greater methane recovery, but diminished CO2 storage capacity. Higher initial CO2 concentrations facilitated better CO2 penetration into the hydrate structure, leading to increased methane recovery and improved CO2 storage.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2022)
Article
Thermodynamics
P. Cheng, C. P. Zhang, Z. Y. Ma, J. P. Zhou, D. C. Zhang, X. F. Liu, H. Chen, P. G. Ranjith
Summary: Nanoindentation tests were conducted to investigate the effects of ScCO2-water treatment on shale matrix micromechanics, revealing significant heterogeneity in the properties of different minerals. Observation of indentation morphologies showed that considerable micro-fractures were generated in clay minerals, correlated to significant plastic deformation and layered crystal structures.
Article
Engineering, Geological
Arun Kumar Murali, Khoa M. Tran, Asadul Haque, Ha H. Bui
Summary: The design of rock-socket piles relies on the shaft resistance to support the load at the serviceability state. This study investigated the load-bearing mechanisms of rock-socketed piles using a miniaturised pile-load test setup and numerical modelling. X-ray CT imaging and numerical modelling revealed three different interface mechanisms and validated the observed micro-mechanics in the rock asperities. The results indicated that the height of the rock asperities significantly influenced the failure mode, with the bottom leading edge carrying the majority of the shaft loads.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
K. M. A. S. Bandara, P. G. Ranjith, W. Zheng, D. D. Tannant, V. R. S. De Silva, T. D. Rathnaweera
Summary: This study provides a grain-scale analysis of the fracture evolution mechanisms of proppant crushing, rock fracture damage during proppant embedment, and the influence of realistic reservoir/fracture fluid on proppant embedment. The results reveal that the selection of an appropriate proppant type is vital in quantifying the degree of proppant crushing and embedment within fractures.
Article
Thermodynamics
Guanglei Zhang, P. G. Ranjith, Qiao Lyu
Summary: This study reveals the effects of CO2 on the micro and nano-scale properties of coal, confirms the softening effects of CO2 on coal, and indicates that these changes are reversible to some extent.
Article
Energy & Fuels
B. Balinee, P. G. Ranjith, Herbert E. Huppert
Summary: The article discusses the impact of building material production on global carbon emissions and presents methods to reduce environmental impact through the use of waste and carbon sequestration. By incorporating discarded aluminum foil and industrial waste gases into cement, the performance and sustainability of cement can be improved. This approach significantly reduces carbon emissions, lowers costs, and stores a large amount of CO2.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Engineering, Geological
V. R. S. De Silva, H. Konietzky, H. Mearten, P. G. Ranjith, W. G. P. Kumari
Summary: This study proposes a novel approach called the hybrid rock pre-conditioning method to enhance the sustainability and efficiency of low-grade ore mining. The method involves the use of soundless cracking demolition agents (SCDAs) to initiate radial fractures in a predrilled host rock, followed by hydraulic stimulation to extend the fractures. The results show that this method can create a high density of fractures around the injection well, and key factors such as rock mass heterogeneity and stress anisotropy affect its performance.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Energy & Fuels
M. H. Samarakoon, P. G. Ranjith
Summary: Ensuring the intactness of cement sheaths is crucial for deep well applications in extreme underground conditions. This study investigates the behavior of wellbore materials, including steel casing, annulus cement sheaths, and surrounding rock formations, under continuous steam injection. The results show that materials in carbonate formations are more vulnerable to stress than those in sandstone formations, and the retention time of maximum temperature in cement sheaths is shorter in sandstone than in carbonate. It is also found that the cement sheaths in compliant formations like sandstone may fail due to tensile cracking along the thinnest thickness.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
