Article
Energy & Fuels
Xian Shi, Caiyun Xiao, Hongjian Ni, Qi Gao, Lei Han, Dianshi Xiao, Shu Jiang
Summary: In order to apply supercritical carbon dioxide (ScCO2) fracturing on tight sandstone properly, the effects of ScCO2 on pore structure were investigated. ScCO2 treatment was applied to three sets of tight sandstone samples, and the pore structure was characterized using high-pressure mercury intrusion porosimetry and nuclear magnetic resonance. The results showed that after SCCO2 treatment, the number of transitional pores decreased significantly, while the number of mesopores and macropores increased. The fractal dimension characteristics indicated that the pore structure became more complicated and heterogeneous, and large pores had a higher fractal dimension than small pores. The content of calcite sharply decreased while clay, feldspar, and plagioclase content had a slight drop after ScCO2 treatment, affecting the alternation of pore structure. Thus, the accumulative pore volume and pore connectivity do not always increase after ScCO2 exposure due to potential pore and channel clogging from re-precipitation and fine migration.
Article
Engineering, Chemical
Mingyang Yang, Shijun Huang, Kuiqian Ma, Fenglan Zhao, Haoyue Sun, Xinyang Chen
Summary: This paper investigates the effects of injecting CO2 into tight oil reservoirs for enhanced oil recovery and CO2 sequestration. The study develops a pore size correction model and conducts experiments to analyze the displacement behaviors in different pore scales. The results reveal the impact of different pore scales on the efficiency of CO2 flooding and huff-n-puff processes.
Article
Thermodynamics
Hao Chen, Xiliang Liu, Chao Zhang, Xianhong Tan, Ran Yang, Shenglai Yang, Jin Yang
Summary: This study focuses on the impact of supercritical CO2 injection on oil recovery in reservoirs, showing that the decrease in gas relative permeability leads to a similar ultimate oil recovery between near-miscible flooding and miscible flooding. A new threshold pressure gradient is proposed as an indicator of reservoir fluids' seepage capacity, emphasizing the importance of CO2-SAG flooding in enhancing oil recovery.
Article
Thermodynamics
Tong Zhang, Tang Ming, Liang Yuan, Guangpei Zhu, Cun Zhang, Yang Liu, Yanfang Li, Wen Wang, Xin Yang
Summary: The study monitors the response of CO2/Oil and pore structure using online low field nuclear magnetic resonance (LF-NMR), considering the effects of in-situ stress and displacement pressure. The results indicate that the pore structure consists of adsorption pore, percolation pore, and migration pore.
Article
Energy & Fuels
Yuxia Wang, Qinghua Shang, Lifa Zhou, Zunsheng Jiao
Summary: The study found that macroscopic permeability heterogeneity in tight sandstone reservoirs can impact the efficiency of CO2-EOR technology, while a high-low permeability model can improve CO2 injectivity, maintain high pressure levels, and increase oil displacement efficiency.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Jingyu Wang, Songhang Zhang, Shuheng Tang, Zhaodong Xi
Summary: This study investigates the pore structure characteristics of coal samples from different mines using nuclear magnetic resonance technique, and conducts displacement experiments of CO2 in water-saturated coal seams. The results show that CO2 can occupy the adsorption sites on the coal surface, reducing the interaction between water and coal and improving the displacement efficiency. It is also found that in the water injection stage, CO2 retention and adsorption result in water only entering larger pores.
NATURAL RESOURCES RESEARCH
(2023)
Article
Energy & Fuels
Xing Huang, Yu Zhang, Mengqing He, Xiang Li, Weipeng Yang, Jun Lu
Summary: This study investigates the characteristics of asphaltene precipitation under different CO2 flooding conditions and evaluates the damage degree and impact on oil displacement efficiency in different types of reservoirs. The results show that asphaltene precipitation has high damage on permeability but little effect on porosity. Additionally, the use of surfactants can reduce the wettability reversal caused by asphaltene precipitation.
Article
Geosciences, Multidisciplinary
Dehao Feng, Chenglin Liu, Xiaolong Feng, Xinpei Wang, Rizwan Sarwar Awan, Xiaoyi Yang, Nuo Xu, Yunfei Wu, Yuping Wu, Qibiao Zang
Summary: This study investigated the movable fluid of the Yanchang tight sandstone in the Ordos Basin through multiple experiments. The results showed that fluid mobility is influenced by factors such as lithology, pore-throat structure, diagenetic minerals, lithofacies, and sandstone strata pattern. The research also found that fluid mobility is significantly correlated with quartz and feldspar content, while negatively correlated with clay and carbonate cement content. Based on these findings, a model for predicting fluid mobility in similar delta front sandstones can be developed.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Engineering, Chemical
Jiani Hu, Meilong Fu, Minxuan Li, Honglin He, Baofeng Hou, Lifeng Chen, Wenbo Liu
Summary: SiO2 nanofluid alternating with CO2 injection can be used as an effective substitute for the conventional water alternating gas (WAG) process in oil flooding experiments. The SiO2 nanofluid demonstrates excellent stability and emulsification properties, making it a promising medium for petroleum-related applications. Smaller slug sizes and an optimal slug ratio can delay the breakthrough time and enhance the effectiveness of nanofluid alternate CO2 flooding for enhanced oil recovery (EOR). Additionally, lower permeability rock cores show higher oil recovery rates.
Article
Chemistry, Multidisciplinary
Hui Gao, Yalan Wang, Yonggang Xie, Jun Ni, Teng Li, Chen Wang, Junjie Xue
Summary: Experimental study reveals that the salinity, interfacial tension, and viscosity of fracturing fluid have negative impacts on oil recovery in the reservoir. Different pore scales exhibit microscale imbibition oil displacement, with an increase in oil production as imbibition time lengthens. Decreasing crude oil viscosity improves small-pore oil production, while low interfacial tension benefits large-pore oil production, and varying salinities affect small pores more significantly than large pores.
Article
Energy & Fuels
Zhihao Jiang, Gaoren Li, Peiqiang Zhao, You Zhou, Zhiqiang Mao, Zhidi Liu
Summary: Wettability is crucial for understanding the seepage characteristics of tight sandstone reservoirs. This study investigates the spontaneous imbibition and displacement behaviors of mixed-wet tight sandstone reservoirs using high precision balance and nuclear magnetic resonance (NMR) T2 experiment. The results reveal different types of pores with different wettability and provide a novel wettability evaluation method for mixed-wet tight sandstone.
Article
Geosciences, Multidisciplinary
Jingdong Liu, Cunjian Zhang, Youlu Jiang, Shuai Hou
Summary: The pore structure of ultra-tight reservoirs plays a key role in controlling quality and fluid flow. The relationship between pore types and rock types was identified, with different types of sandstone reservoirs having distinct pore characteristics. High-pressure mercury intrusion and fractal theory were used for quantitative assessment.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Engineering, Chemical
Xiong Liu, Xin Fan, Jian Yin, Yang Zhang
Summary: The study shows that in fractured tight sandstone reservoirs, imbibition replacement mainly occurs in fractures, with macropores contributing the most to imbibition recovery, while mesopores, micropores, and pinholes contribute less. Capillary force and gravitational force are key parameters controlling fluid flow, and fluid replacement mostly happens in the early stages of imbibition.
Article
Energy & Fuels
Aifen Li, Weibing Tian, Xiaoxia Ren, Shuaishi Fu, Dongdi Cui, Qi Fang, Min Ma, Yapcheptoyek Josephine
Summary: This paper analyzed the petrophysical properties of tight sandstone gas reservoirs through XRD, SEM, and NMR experiments, investigating water saturation and fractal characteristics. Experimental results showed the relationship between connate water saturation and permeability, presenting formulas and models for calculations. Additionally, the fractal characteristics of pore throat were analyzed using an improved NMR method, revealing irregular and complex structures.
INTERNATIONAL JOURNAL OF OIL GAS AND COAL TECHNOLOGY
(2021)
Article
Energy & Fuels
Yu-Bin Yang, Wen-Lian Xiao, Ling -Li Zheng, Qi-Hong Lei, Chao-Zhong Qin, You-An He, Shuai-Shuai Liu, Min Li, Yong -Ming Li, Jin-Zhou Zhao, Meng Chen
Summary: The microscopic heterogeneity of pore-throat structures in tight sandstone is a crucial factor affecting the fluid flow mechanism. This study developed a new procedure to characterize the pore size distribution (PSD) and throat size distribution (TSD) using nuclear magnetic resonance (NMR), cast thin section (CTS), and constant-rate mercury injection (CRMI) tests. The results showed that the tight sandstone had a wide range of PSD and TSD, mainly contributed by micropores and mesopores. The heterogeneity of throats was found to be stronger than that of pores. The heterogeneity of throats played an important role in the gas-phase seepage capacity under different injection pressures.
Article
Thermodynamics
Yi-Bo Li, Hao Gao, Wan-Fen Pu, Liang Li, Yafei Chen, Baojun Bai
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2019)
Article
Energy & Fuels
Shuai Zhao, Wanfen Pu, Bing Wei, Xingguang Xu
Article
Energy & Fuels
Bing Wei, Qinzhi Li, Jian Ning, Yuanyuan Wang, Lin Sun, Wanfen Pu
Article
Engineering, Chemical
Rui Liu, Daijun Du, Wanfen Pu, Qin Peng, Zhengwu Tao, Yu Pang
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2019)
Article
Energy & Fuels
Shuai Zhao, Wanfen Pu, Chengdong Yuan, Xiaoqiang Peng, Jizhou Zhang, Liangliang Wang, Dmitrii A. Emelianov
Article
Energy & Fuels
Shuai Zhao, Wanfen Pu, Boshuai Sun, Fei Gu, Liangliang Wang
Article
Engineering, Chemical
Lin Sun, Qi Han, Daibo Li, Xiao Zhang, Wanfen Pu, Ximing Tang, Yongchang Zhang, Baojun Bai
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Energy & Fuels
Ya-fei Chen, Wan-fen Pu, Xue-li Liu, Yi-bo Li, Mikhail A. Varfolomeev, Jian Hui
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Materials Science, Multidisciplinary
Yang Yang, Wanfen Pu, Xingguang Xu, Bing Wei, Yunxia Yang, Colin D. Wood
MACROMOLECULAR MATERIALS AND ENGINEERING
(2019)
Article
Energy & Fuels
Wanfen Pu, Chao Shen, Shishi Pang, Xingjian Tang, Bowen Chen, Zilai Mei
PETROLEUM SCIENCE AND TECHNOLOGY
(2019)
Article
Energy & Fuels
Wanfen Pu, Zhezhi Liu, Jihui Ni, Huancai Fan
PETROLEUM SCIENCE AND TECHNOLOGY
(2019)
Article
Energy & Fuels
Yafei Chen, Wanfen Pu, Xueli Liu, Yibo Li, Xiaolong Gong, Jian Hui, Hen Guo
Article
Chemistry, Physical
Yang Yang, Wan-Fen Pu
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2020)
Article
Energy & Fuels
Dai-jun Du, Wan-fen Pu, Xin Tan, Rui Liu
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2019)
Article
Chemistry, Multidisciplinary
Yang Yang, Wanfen Pu, Xingguang Xu, Bing Wei, Colin D. Wood
CHEMICAL COMMUNICATIONS
(2019)
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.