Article
Energy & Fuels
Fei Mo, Zhilin Qi, Xiaoliang Huang, Wende Yan, Shuai Wang, Yingzhong Yuan, Zhiqiang Li
Summary: This study proposed a model to calculate the diffusivity of gases in water-bearing shales. The results showed that the presence of water significantly reduced the gas diffusion in shales. In addition, factors such as temperature, pore radius, porosity, and pore wall roughness were found to affect the diffusion coefficient.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Rui Yu, Zetang Wang, Cheng Liu, Wenli Zhang, Yuxuan Zhu, Mengmeng Tang, Qianjin Che
Summary: This study investigates the microstructure and heterogeneity of coal-bearing organic shale in the southeast Ordos Basin using a combination of various methods. The results show that the shale in this area is organic-rich with high pore volume and specific surface area. Methane is mainly stored in organic pores.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Xuexiang Fu, Chunpeng Zhao, Zengmin Lun, Haitao Wang, Man Wang, Dengfeng Zhang
Summary: Exploring the feasibility of using microwave field radiation to produce shale gas via temperature swing, preliminary research shows that gas-bearing shales can significantly absorb microwave energy. Controlled microwave radiation alters the physicochemical properties and adsorption capability of shales, promoting desorption and migration of shale gas within reservoirs. Furthermore, microwave radiation changes the surface chemistry of shales, weakening the intermolecular force and decreasing the maximum CH4 adsorption capacity by 12.70-47.83%.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
Hongjian Zhu, Jian Gao, Manping Yang, Erxiu Shi, Yanjun Lu, Yu Qi, Mingbo Wei, Wanxin Wang
Summary: This article compares the microstructure and petrophysical properties of undeformed and naturally deformed shales in the Southeast Sichuan Basin. The results show that undeformed shales have more developed organic pores, while deformed shales are dominated by carbonate solvopores, clay-hosted pores, and microfractures. Deformed shales exhibit larger CO2 and N2 adsorbed contents, pore surface areas, and pore volumes. Additionally, deformed shales have higher porosity and permeability compared to undeformed shales due to the presence of a more open pore-fracture network.
Article
Geosciences, Multidisciplinary
Jian Sun, Xianming Xiao, Qiang Wei, Peng Cheng, Hui Tian
Summary: Systematic studies on the gas-bearing properties of the shallow Longmaxi shale outside the Sichuan Basin are rare. This study investigated the pore structure and water occurrence characteristics of Longmaxi shale samples, finding that water significantly impacts the adsorption capacity of inorganic matter pores. Additionally, the results showed that adsorbed gas primarily occurs in organic matter nanopores, allowing for storage even when the shales are saturated with water.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Tonglou Guo, Xianghao Meng, Wei Lei, Mingming Liu, Liang Huang
Summary: This study conducted systematic experimental characterization to understand the pore structures and methane sorption in deep-marine shales. The results showed that factors such as organic matter content and clay minerals affect the pore structures and sorption behaviors in deep shales. The findings also indicate that deep shales have higher micropore content from organic matter and lower macropore content from clay minerals compared to shallow shales. The total organic carbon (TOC) content is the primary controlling factor on pore structure and sorption capacity in deep shales, while the influence of clay minerals on gas sorption is less pronounced.
NATURAL RESOURCES RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Qian Wang, Xianbo Su, Yi Jin, Peihong Chen, Weizhong Zhao, Shiyao Yu
Summary: This study investigates the pore structure of coal measure shale in the Sunan Syncline block. The results show that the shale has well-developed pores, mainly composed of clay minerals and quartz. The specific surface area of the pores is highest in those smaller than 5 nm, indicating their significant role in gas adsorption. The pore volume is mainly concentrated around 10 nm, contributing the most to pore volume and gas accumulation. The study also found that the content of organic carbon and clay minerals has a significant impact on the pore structure and shale porosity, with higher content leading to higher porosity.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Energy & Fuels
Qingyi Tu, Yuanping Cheng, Sheng Xue, Ting Ren
Summary: The study reveals that the particle size of tectonic coal decreases during the formation process, leading to significant changes in pore structure and initial gas desorption characteristics. The reduction in particle size has a crucial impact on the initial gas desorption capacity of tectonic coal, making it essential for gas energy release in the outburst process.
Article
Energy & Fuels
Xiang Ao, Baobao Wang, Hai Qu, Zuping Xiang, Zhoujun Luo
Summary: Shale gas serves as an additional energy source if fossil fuels become depleted. However, industrial applications must consider the strain of shale caused by CO2 injection and the presence of CO2 inside the reservoir.
Article
Energy & Fuels
Jian Xiong, Junfang Tang, Xue Zhou, Xiangjun Liu, Lixi Liang, Lianlang Hou
Summary: The wettability behaviors of nanoscale pores in shales from the Longmaxi Formation in the Sichuan Basin were investigated. It was found that organic matter pores and inorganic pores in shales show cross-distribution. The spontaneous imbibition of oil is slower than that of water and increases with the total organic carbon content. Illite and quartz mineral surfaces are hydrophilic. The wetting contact angle of the organic matter surface increases with the increase in oxygen-containing functional groups but decreases with increasing temperature.
Article
Geosciences, Multidisciplinary
Sijian Zheng, Shuxun Sang, Meng Wang, Shiqi Liu, Kai Huang, Guangjun Feng, Yu Song
Summary: Injecting CO2 into shale reservoirs has dual benefits for enhancing gas recovery and CO2 geological sequestration, which is crucial for China's energy security and carbon neutrality goals. This study investigates the CO2 adsorption mechanism in shales using isothermal adsorption measurement and petro-physical characterization methods. The results show that the sorption capacity of CO2 in shales increases gradually with injection pressure and can be described by the Langmuir model. Organic carbon content is the most significant control factor, along with other secondary factors such as vitrinite reflectance, clay content, and brittle mineral content. The research findings can be applied to evaluate the potential of CO2 geological storage in shales.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Energy & Fuels
Zhenhua Tian, Wei Wei, Shangwen Zhou, David A. Wood, Jianchao Cai
Summary: This study conducted a comprehensive analysis of the microstructure characteristics of marine shale samples from the Longmaxi Formation in the Sichuan Basin, China. It identified a complex pore network in these shales, consisting of various pore types such as microfractures, intergranular pores, and organic pores. The research also revealed correlations between total organic carbon content, microstructures, and nanopore distribution.
Article
Thermodynamics
Qiyang Gou, Shang Xu, Fang Hao, Feng Yang, Zhiguo Shu, Rui Liu
Summary: The study shows that tectonism significantly impacts the pore characteristics of organic-rich shales. Shales from stable regions have better pore structure parameters compared to deformed region shales, resulting in higher shale gas yield. The research also provides 3D pore deformation information of shale reservoirs under complex tectonic episodes.
Article
Energy & Fuels
Kang Yang, Junping Zhou, Xuefu Xian, Yongdong Jiang, Chengpeng Zhang, Zhaohui Lu, Hong Yin
Summary: The study investigated the impact of supercritical CO2-water exposure on the adsorption characteristics of shale, revealing that increasing exposure pressure and decreasing exposure temperature resulted in a gradual decrease in CH4 and CO2 adsorption capacity in shale due to alterations in mineral composition and pore structure. The study also found that the selectivity factor of CO2 to CH4 decreased with increasing exposure pressure and decreasing temperature, indicating the feasibility of CO2-enhanced shale gas recovery and sequestration even after exposure to ScCO2-water.
Article
Energy & Fuels
Min Li, Xiongqi Pang, Liang Xiong, Tao Hu, Di Chen, Zhen Zhao, Shasha Hui, Yang Liu, Siyu Zhang
Summary: The study systematically analyzed the shale gas occurrence characteristics of deep high-over mature shales using the Longmaxi Formation as an example, and found that factors such as temperature, pressure, pore structure, and organic matter content have an influence on the occurrence characteristics of shale gas.
Article
Energy & Fuels
Dongyu Wu, Huaidong Zhang, Shaohe Zhang, Jingqiang Tan, Pinghe Sun, Yongjiang Luo, Shuai Gao, Yanhong Xue
Summary: The study focused on the bottom-hole cleaning performance of swirling jet induced by a drill bit nozzle. Computational fluid dynamics simulations were conducted to compare swirling jet with straight jet, showing that swirling jet had poorer cleaning performance than straight jet in removing drilled cuttings.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Plant Sciences
Minghao Du, Jaak Nolvak, Jingqiang Tan, Shijia Gao, Wenhui Wang
Summary: This study presents a new analysis of melanosclerites from the Late Ordovician to earliest Silurian, identifying 12 species and plotting their palaeogeographical occurrences on an up-to-date map. The distribution pattern of these organisms shows a tendency to occur in low-latitude, warm-water regions, mainly confined within the tropics and subtropics. Comparing with Palaeozoic hydroids, both fossils overlap in palaeogeographical distribution, indicating a potential close biological affinity between the two types of organisms.
Article
Engineering, Geological
Jingqiang Tan, Bingbin Xie, Qiao Lyu, Shefa Chen, P. G. Ranjith
Summary: The effects of CO2 and CO2-based fluids imbibition on the mechanical properties of shale are investigated in this study. The results show that the mechanical properties of shale have significant variations after different imbibitions, with the largest effect observed for sub-CO2-water and Sc-CO2-water imbibitions. Pure CO2 saturation has the smallest effect on shale's mechanical properties. The statistical damage constitutive model used in this study can well describe the stress-strain relationship of shale under different soaking conditions.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Environmental Sciences
Wenpo Xu, Chengshuai Liu, Jian-Ming Zhu, Hongling Bu, Hui Tong, Manjia Chen, Decan Tan, Ting Gao, Yizhang Liu
Summary: The adsorption behavior of cadmium by mineral-organic associations (MOAs) formed by clay minerals and organic matter is influenced by the speciation of amphoteric organic matter and solution pH. The adsorption capacities of MOAs vary under different conditions, providing insights into the mobility and fate of cadmium in clay-based soils.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Engineering, Environmental
Jimei Zhou, Yizhang Liu, Hongling Bu, Peng Liu, Jing Sun, Fei Wu, Jian Hua, Chengshuai Liu
Summary: Scorodite can immobilize most of the arsenic in acidic arsenic-contaminated environments, but reductive dissolution of scorodite may occur during redox changes. This study investigated the transformation of scorodite induced by dissolved Fe(II) under anaerobic conditions and its effects on arsenic behavior. The results showed that the formation of parasymplesite and ferrihydrite-like species during scorodite transformation was controlled by Fe(II)aq concentrations. The newly formed species immobilized dissolved As(V) through adsorption and incorporation. Additionally, As(V) reduction occurred during Fe(II)-induced scorodite transformation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Ecology
Jeffrey M. Dick, Jingqiang Tan
Summary: By combining taxonomic abundances from 16S rRNA gene sequencing datasets with reference microbial proteomes from the NCBI RefSeq database, the carbon oxidation state of estimated community proteomes can be used as a proxy for environmental redox conditions. Analysis of multiple datasets confirms this prediction.
Article
Geosciences, Multidisciplinary
Zhongliang Ma, Jingqiang Tan, Lunju Zheng, Chunhua Ni, Ruining Hu, Jianfei Ma
Summary: This study reveals the impact of total component fluids from source rock on reservoir transformation during hydrocarbon evolution through simulation experiments. Under closed conditions, the interaction between fluids and feldspar sandstone leads to the alteration of feldspar minerals and the generation of clay minerals, resulting in reservoir tightness. Additionally, a semi-quantitative evaluation method for feldspar dissolution and porosity was established. The geological characteristics of the Yanchang Formation of the Ordos Basin affect the retention effect of diagenetic fluids, and oil and gas exploration should focus on finding sedimentary sand facies bodies favorable for the preservation of primary pores.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Fangyuan Meng, Hongling Bu, Yingheng Fei, Manjia Chen, Qinkai Lei, Dong Liu, Jian Hua, Fei Wu, Chengshuai Liu
Summary: This study investigates the transformation of ferrihydrite in the presence of Fe2+ and clay minerals. The results show that the presence of clay minerals affects the transformation products of ferrihydrite, including particle dispersion, organic matter content, and transformation pathways. Organic matter increases the dispersion of ferrihydrite and reduces the adsorption capacity of Fe2+.
APPLIED GEOCHEMISTRY
(2022)
Article
Energy & Fuels
Wenquan Xie, Jingqiang Tan, Wenhui Wang, Jianliang Jia, Zhaojun Liu, Jian Wu, Yong Wang, Xueqi Song
Summary: Inertinite in coals contains crucial information on the paleo-wildfire history and its relationship with local ecosystem evolution. This study investigates the Middle Jurassic coal seams of the Shimengou Formation in the Qaidam Basin and identifies abundant evidence of paleo-wildfires, including inertinite and combustion-derived polycyclic aromatic hydrocarbons. These findings confirm the existence of widespread wildfires during the late Middle Jurassic period and suggest a high level of atmospheric oxygen concentration. The study also reveals that incidental mercury emissions from wildfires contribute to the mercury enrichment in coal seams, providing insights into the abnormal enrichment of mercury in coal.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2022)
Article
Energy & Fuels
Chenger Hu, Jingqiang Tan, Qiao Lyu, Gan Feng, Jindong Shi, Kaixi Wang, Zhanghu Wang
Summary: This study investigates the interaction between fracturing fluid and shale during hydraulic fracturing. The results show that the fluid-shale reaction is time-dependent, and the dissolved minerals and pH values vary with time. The dissolution of minerals can enhance the porosity and gas adsorption capacity of shale, but secondary precipitation during long-term experiments can block pores and decrease the shale's porosity and hydraulic characteristics.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2022)
Article
Thermodynamics
Hongling Bu, Yanfu Wei, Chengshuai Liu, Dong Liu, Daoyong Tan, Hongmei Liu
Summary: In this study, Illite-smectite (I-Sm) clay minerals were investigated for their effects on the thermal evolution of organic matters (OMs). It was found that the I-Sm clay minerals influenced the main thermal decomposition temperature and gas products of pyrolyzed OMs. The physicochemical properties of the minerals and the functional groups of OMs played key roles in these effects.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Environmental Sciences
Hongling Bu, Qinkai Lei, Hui Tong, Chengshuai Liu, Shujie Hu, Wenpo Xu, Yujie Wang, Manjia Chen, Jiangtao Qiao
Summary: Abiotic reduction of iron (oxyhydr)oxides by aqueous Fe(II) is an important process in the Fe cycle in soil. This study investigates the phase transformation of Lep-HA coprecipitates induced by Fe(II) and its implications for immobilizing heavy metals, particularly Cd(II). The presence of co-precipitated HA reduces the solid phase transformation of Fe, and newly formed magnetite immobilizes Cd(II) through surface complexes, incorporation, or structural substitution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Jiaqing Zeng, Wenshun Ke, Min Deng, Jingqiang Tan, Chuxuan Li, Yizhi Cheng, Shengguo Xue
Summary: Smelting activities are the main pathway for releasing heavy metals into the soil-groundwater environment. This study conducted a comprehensive investigation of soil from an abandoned Zn smelting site and quantified the factors affecting heavy metal pollution. The results showed severe soil contamination and identified potential pollution sources and soil permeability as the main drivers for heavy metal distribution and accumulation.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Chemistry, Physical
Yanfu Wei, Peng Yuan, Junming Zhou, Jing Liu, Dusan Losic, Honghai Wu, Hongling Bu, Xinjie Tan, Zheng Li
Summary: Understanding precipitation formation at lanthanum hydroxide (La(OH)3) nanoparticle-solution interfaces is crucial for various applications. In this study, we used liquid-phase transmission electron microscopy to investigate the atomic-scale precipitation formation at La(OH)3 nanoparticle interfaces after reacting with phosphate. The results provide valuable references for observing precipitation at solid-solution interfaces.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Dong Liu, Mengyuan Li, Rongda Yu, Haoyu Li, Yuguo Shen, Qian Tian, Hongling Bu, Chuanqin Huang, Wenfeng Tan
Summary: This study confirmed the presence of organic matter in the interlayer space of hydroxy-interlayered clay minerals (HIMs) in red earth using high-resolution transmission electron microscopy-electron energy loss spectroscopy, providing direct visible evidence of interlayer organic matter in red earth.
APPLIED CLAY SCIENCE
(2023)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.