Article
Chemistry, Multidisciplinary
Jianchi Hao, Hu Wen, Li Ma, Jinbiao Fei, Lifeng Ren
Summary: This study analyzes the adsorption characteristic curves of three coal samples for CO2, finding that the curves are independent of temperature and have a negative correlation between adsorption potential and adsorbed phase volume. A prediction model for CO2 adsorption by coal is derived based on the adsorption potential theory, showing accurate and reliable results. The model can predict adsorption capacity under different temperature and pressure conditions with a strong correlation to experimental data, making it a valuable tool for practical applications.
Article
Chemistry, Multidisciplinary
Hu Wen, Jianchi Hao, Li Ma, Xuezhao Zheng
Summary: The study revealed that the process of CO2 replacing CH4 can be divided into different stages, with desorption amount varying with time and temperature, and replacement ratio showing a positive correlation with replacement time. Overall, an increase in CO2 injection pressure would result in higher cumulative displacement ratio.
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.
Review
Geosciences, Multidisciplinary
Christopher Wnuk
Summary: Coal formation in Asia is closely related to the transit of the subcontinent through the Intertropical Convergence Zone. Coal is most abundant in coastal areas within the Zone, which also experienced high rainfall and elevated atmospheric CO2 concentrations. The formation of coal is influenced by factors such as plant growth, sediment input, and CO2 concentration. Accumulation of carbon in the form of peat, carbonaceous shale, and plant debris helps to sequester atmospheric CO2. The potential for carbon sequestration in the Bara Formation of Pakistan is significant, but large areas of coal potential remain unexplored.
EARTH-SCIENCE REVIEWS
(2022)
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
S. A. Yankovsky, G. V. Kuznetsov, A. A. Tolokolnikov, I. V. Cherednik, A. A. Ivanov
Summary: This study experimentally investigated the thermal decomposition processes of D grade steam coal and wood, confirming that using wood as an additive can reduce sulfur oxide yield during combustion. The formation of calcium and aluminum sulfates in the mixed fuel ash contributes to decreasing sulfur oxide concentration in gaseous products of thermal decomposition.
Article
Energy & Fuels
Guanglei Zhang, P. G. Ranjith, Zhongsheng Li, Mingzhong Gao, Zhaoyang Ma
Summary: In this study, the long-term effects of CO2 injection on the structural and mechanical properties of water-saturated coal were investigated. It was found that the presence of water during CO2 injection resulted in significant changes in the mechanical properties of coal, primarily due to sorption-induced cracking causing structural damage. The extent of reduction in mechanical properties was less compared to pure CO2 injection, potentially due to the hindrance of CO2 sorption by water.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Applied
Eduardo J. Cueto-Diaz, Fabian Suarez-Garcia, Santos Galvez-Martinez, Maria Pilar Valles-Gonzalez, Eva Mateo-Marti
Summary: Efforts to capture CO2 have become more intense due to the impact of climate change on ecosystems and biodiversity. This study focuses on developing different methods for CO2 sequestration and investigates the influence of functional chemical groups on CO2 adsorption.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Thermodynamics
He Yang, Yiyang Yin, Yanpeng Ban, Erguang Guo, Yan Shang, Lijun Jin, Yang Li, Haoquan Hu
Summary: Understanding the relationship between pores and the chemical structures of char can aid in analyzing the interaction between chemical reactions and mass transfer during coal gasification. The study found that the mesopore-specific surface area increased exponentially with the decrease of A G / A Other, and the specific surface area of pores with different sizes increased with the increase of aliphatic carbon content and substituent content.
COMBUSTION AND FLAME
(2023)
Article
Energy & Fuels
Mohammadreza Zare Reisabadi, Mohammad Sayyafzadeh, Manouchehr Haghighi
Summary: This study investigates the effects of matrix swelling and well trajectory on permeability in coal seam gas reservoirs during CO2 injection. The results show that vertical injection wells experience a significant decline in permeability due to swelling, while horizontal wells do not.
Article
Engineering, Chemical
Chuandong Ma, Zhisen Li, Wenqi Zhang, Meng He, Qingbiao Wang, Zhenhua Wang, Lin Li, Xiaofang You
Summary: In this study, hydrocarbon oil was used to modify coal gasification fine slag, enhancing its hydrophobicity and improving the flowability of the resulting coal-water slurry. The addition of hydrocarbon oil also reduced the ignition temperature of the slurry. These findings suggest that hydrocarbon oil modification is beneficial for enhancing the properties of coal gasification fine slag and its slurry.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ping Chen, Ying Wang, Peipei Wang, Mingyan Gu, Boyu Jiang, Kun Luo, Jianren Fan, Yi Wang
Summary: Ammonia-coal co-combustion is a feasible approach for reducing CO2 emissions in thermal power generation. Studying the NO formation mechanism during ammonia-coal co-firing is necessary for achieving low-carbon and low-nitrogen combustion. Experimental results show that temperature and ammonia ratio significantly influence NO formation. Theoretical calculations indicate that NH formation in NH3->NH->NO is one of the limiting factors for ammonia combustion. The combination of experimental and theoretical results suggests that high temperatures enhance the reduction of NO by ammonia/char, reducing the conversion of ammonia-N/coal-N to NO.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Hon Chung Lau
Summary: Coal-fired power plants in Asia contribute significantly to global CO2 emissions, and carbon capture and storage (CCS) technology has the potential to reduce these emissions. This study evaluates the potential contribution of CCS in decarbonizing coal-fired power plants in selected Asian countries and identifies the readiness of existing plants for CCS retrofitting. The findings show that CCS retrofitting can result in substantial CO2 abatement, particularly in India and China.
Article
Green & Sustainable Science & Technology
Fernando J. Guerrero, Daniel Perez-Zarate, Rosa Maria Prol-Ledesma, Rodrigo Garza-Galindo, Alfonso Reyes-Sandoval, Eduardo A. Garcia-Zamorano
Summary: The latest studies on CO2 geological sequestration in Mexico suggest that areas with geological stability and high emission centers have high sequestration potential. However, these studies overlook the potential of high heat flow areas in Mexico for CO2 geological sequestration through mineral precipitation. In this study, the CO2 sequestration capacity of Pre-Comondu sandstones in the Las Tres Virgenes geothermal field was assessed. The results show that the sandstone is favorable for CO2 mineralization through carbonate precipitation in moderate geologic times. The mineral changes occur in two zones, with the zone close to the injection point dominated by the precipitation of low-albite, kaolinite, calcite, and minor siderite. The decline in porosity is moderate and occurs in the long term, suggesting a moderate risk for injection operations. The high pressure in the system counteracts the unfavorable effect of high reservoir temperature, resulting in an accelerated sequestration rate.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Engineering, Environmental
Farshad Feyzbar-Khalkhali-Nejad, Ehsan Hassani, Ali Rashti, Tae-Sik Oh
Summary: Carbon monoxide is a crucial feedstock in the petrochemical industry for producing various chemicals. Adsorption, as a cost-effective method of separation, can achieve high CO adsorption capacity and selectivity with the right choice of adsorbent. Various techniques like FTIR, mass spectroscopy, and microcalorimetry are used for data collection in adsorption studies.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Richard Sakurovs, Liliana de Campo, Christine Rehm
Article
Energy & Fuels
Alireza Keshavarz, Richard Sakurovs, Mihaela Grigore, Mohammad Sayyafzadeh
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2017)
Article
Energy & Fuels
Hannah Lomas, Richard Roest, Adam Wells, Hui Wu, Zhengyi Jiang, Richard Sakurovs, Russell Stuart, Lauren North, Tizshauna Thorley, Merrick R. Mahoney
Article
Energy & Fuels
Sheridan Mayo, Matthew Josh, Dane Kasperczyk, James Rear, Junfang Zhang, Jeremie Dautriat, Marina Pervukhina, Michael Ben Clennell, Richard Sakurovs, Neil Sherwood, Anton Maksimenko, Chris Hall
Article
Energy & Fuels
Richard Sakurovs, Lukas Koval, Mihaela Grigore, Anna Sokolova, Liliana de Campo, Christine Rehm
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2018)
Article
Energy & Fuels
Jitendra Bahadur, Leslie F. Ruppert, Vitaliy Pipich, Richard Sakurovs, Yuri B. Melnichenko
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2018)
Article
Energy & Fuels
Richard Sakurovs, Lukas Koval, Mihaela Grigore, Anna Sokolova, Leslie F. Ruppert, Yuri B. Melnichenko
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2018)
Article
Metallurgy & Metallurgical Engineering
Lukas Koval, Richard Sakurovs, Kim Hockings
IRONMAKING & STEELMAKING
(2020)
Article
Energy & Fuels
Ali Kiani, Richard Sakurovs, Mihaela Grigore, Alireza Keshavarz, Stephen White
Article
Energy & Fuels
Hannah Lomas, Richard Roest, Tizshauna Thorley, Adam Wells, Hui Wu, Zhengyi Jiang, Richard Sakurovs, Sharna Wotherspoon, Richard A. Pearson, Merrick R. Mahoney
Article
Energy & Fuels
Ali Kiani, Richard Sakurovs, Mihaela Grigore, Anna Sokolova
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2018)
Article
Energy & Fuels
Lukas Koval, Richard Sakurovs
Article
Energy & Fuels
Gregory N. Okolo, Raymond C. Everson, Hein W. J. P. Neomagus, Richard Sakurovs, Mihaela Grigore, John R. Bunt
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2019)
Article
Metallurgy & Metallurgical Engineering
Hannah Lomas, Richard Roest, Adam Wells, Tizshauna Thorley, Hui Wu, Zhengyi Jiang, Richard Sakurovs, Robert Fetscher, Xing Xing, Merrick R. Mahoney
Summary: This study compared cokes produced in different ovens to assess the replication ability of a small-scale sole-heated oven in modeling pilot-scale oven cokes. The results suggest that the sole-heated oven, combined with an annealing step, can effectively replicate the pilot-scale oven, providing a rapid screening method for cokes with specific characteristics.
IRONMAKING & STEELMAKING
(2021)
Article
Energy & Fuels
Richard Sakurovs, Mihaela Grigore, Anna Sokolova, Jitendra Mata
Summary: Small Angle Neutron Scattering and Ultra Small Angle Neutron Scattering were used to investigate the changes in pore size distribution of three cokes prepared from Australian coals after annealing at temperatures of 1400 and 1600 degrees C. The study found that annealing caused substantial changes in pore size distribution, with the greatest percentage increase occurring around 10 nm pore size. The number of open pores increased significantly, while the number of closed pores decreased slightly for pores in the size range of 100 nm to 2 mu m. The effect of annealing on pore numbers decreased with increasing pore size above 100 nm.