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
Energy & Fuels
Songyan Li, Lu Sun, Lei Wang, Zhaomin Li, Kaiqiang Zhang
Summary: This study investigates the efficacy of hybrid CO2-N-2 gases as gas solvents for enhancing tight oil recovery through laboratory tests, finding that the optimal ratio of CO2-N-2 is 1:2 with a best oil recovery of 39.0%. It is observed that the first three HnP cycles typically have higher oil recovery, with subsequent cycles being less beneficial. The NMR-assisted coreflood tests reveal uneven residual oil distributions and the varying effectiveness of CO2 and N-2 HnP in different pore scales, where N-2 HnP shows better oil extraction ability in small pores.
Article
Energy & Fuels
Cheng Liu, Qing You, Tianru Wang, Bojie Zhou, Wei Peng, Yuechun Du, Yifei Liu, Yuyang Li, Caili Dai
Summary: This study investigates the impact mechanism of fracturing fluid on reservoirs and the imbibition mechanism of slickwater in compact reservoirs. The results provide theoretical support and a scientific basis for optimizing fracturing, flowback methods, and post-fracturing stimulation in compact reservoirs.
Article
Energy & Fuels
Tian-Tian Zhang, Zhi-Ping Li, Caspar Daniel Adenutsi, Yong-Zhou Wei, Zhen-Fu Ma, Qing You
Summary: This study systematically examined the imbibition efficiencies of various nanofluids at 60 degrees C, showing that anionic-nonionic and anionic nanofluids exhibited excellent wettability alteration capabilities, significantly increasing oil recovery.
Article
Geosciences, Multidisciplinary
Qibiao Zang, Chenglin Liu, Rizwan Sarwar Awan, Xiya Yang, Zhendong Lu, Guoxiong Li, Yuping Wu, Dehao Feng, Yu Ran
Summary: This research analyzed the characteristics and movable fluid distribution of the Chang 7 reservoir and found significant differences in reservoirs from different areas. Sandstone from the Heshui Block exhibited better physical properties and higher content of movable fluid in submicron pores.
NATURAL RESOURCES RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Zhengxiu Wu, Rongsheng Lu, Xiaowen Jiang, Junnan Wang, Yi Chen, Pan Feng, Zhonghai Harry Xie, Zhonghua Ni, Hong Yi, Dan Xiao
Summary: A novel 2-D NMR T-1-T-2S measurement method for hydrated cement paste is proposed in this article, which can provide a more accurate assessment of crystalline solid phases in the paste. Experimental results demonstrate the detection and quantification of Portlandite and Ettringite in hydrated cement paste using this method.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Chemical
Xinglei Song, Hui Gao, Congjun Feng, Ping Yi, Chen Wang, Teng Li
Summary: The micro-pore structure of the tight sandstone reservoir greatly affects the occurrence of tight oil. This research focused on the micro-pore structure of the Jiyuan Chang 8 tight sandstone reservoir in the Ordos Basin and found that it plays a crucial role in the distribution and formation process of tight oil.
Article
Energy & Fuels
Wenhao Jia, Senlin Xie, Yimeng Wang, Zelin Liu, Huilin Deng, Hongwei Zhou
Summary: Understanding the evolution of coal's pore structure during creep is crucial for investigating time-dependent properties and ensuring the long-term safety of deep coal and underground engineering. Triaxial compression and creep tests, along with real-time monitoring of T2 spectra using NMR, allow for quantitative analysis of pore characteristics. The experiments revealed that deep coal samples have a high proportion of adsorption pores and show significant changes in pore structure during creep tests. The rate of creep porosity growth can accurately describe the damage accumulation and pore structure development during creep, highlighting the importance of monitoring pore structure changes for understanding creep damage mechanisms.
Article
Energy & Fuels
Haibo Li, Zhengming Yang, Tiyao Zhou, Hai jian Li, Wei Liu, Hekun Guo, Yixin Dai, Yutian Luo, Yapu Zhang
Summary: Based on parallel rock samples of tight oil reservoirs, experiments were conducted to compare the imbibition effect of different wettability, water saturation, and sizes under formation water and active water conditions. The results showed that surfactant can promote the imbibition effect and has a higher enhancement effect on lipophilic cores. It can effectively reduce the seepage resistance of lipophilic cores and enhance the imbibition recovery ratio of macropores. The influence of surfactant is greater on high water-contained cores and large cores.
Article
Energy & Fuels
Hui Li, Can Wang, Ben Li, Xixia Wen, Jianchuan Li, Lu Tian
Summary: Imbibition experiments were conducted on 2D nano blackcard, nanoemulsion, and water in this study. The distribution characteristics of pore-throat fluid before and after core imbibition were analyzed using nuclear magnetic resonance technology, and the enhanced oil recovery effects were evaluated. The results showed that the cores soaked in 2D nano blackcard and nanoemulsion had final recovery factors of 32.29% and 26.05%, respectively, while the water soaking resulted in a recovery factor of 7.19%. It was found that 2D nano blackcard had the best imbibition effect.
Article
Geosciences, Multidisciplinary
Xiangliang Qiu, Li Ding, Junkai Liu, Zhandong Yan, Yanxin Bao, Chengqian Tan
Summary: This study establishes a quantitative evaluation system for reservoir quality suitable for tight oil sandstones using nuclear magnetic resonance, clay mineral analysis, high pressure mercury injection analysis, and logging interpretation technology. The evaluation results are highly consistent with the actual production situation, indicating broad application prospects.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
Qi Wang, Chuandong Jiang, Kai Luo
Summary: This article presents a measurement scheme using a SEP rotating coil for 2-D imaging of water-bearing structures in tunnels and mines. The imaging results of SEP are better than those of OVE and do not have symmetric artifacts. The influence of various factors on imaging results is discussed, and the effectiveness of the SEP rotating coil measurement scheme is validated.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Thermodynamics
Meiling Jiang, Haixu Fang, Yang Liu, Yunfeng Zhang, Chaoqun Wang
Summary: This study combined nuclear magnetic resonance technology and constant velocity mercury injection technology to quantitatively study the saturation of movable fluid and its main controlling factors in tight sandstone reservoirs. The results showed that pore structure, total mercury saturation, median pressure, and throat radius have a significant influence on the saturation of movable fluid. Factors such as diagenesis and sedimentation, burial depth, and microfacies distribution also affect the fluidity of the reservoir. Estuary bar and sheet sand microfacies are mainly associated with different types of reservoirs.
Article
Engineering, Environmental
Xudong Jing, Qiang Sun, Hailiang Jia, Zhenlong Ge, Ting Wang
Summary: This study on the variations in rock pore structure under high-temperature thermal cycles focused on red sandstone from Linyi, Shandong Province. The analysis revealed that the changes in pore structure were primarily caused by the escape of pore water, thermal expansion, and the decomposition of some minerals. Additionally, the proportion of different types of pores were significantly impacted at different temperature ranges, with an increase in mesopores being observed at 573 degrees C and an increase in mesopores after multiple thermal cycles at 600 degrees C.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Energy & Fuels
Yang Zhao, Baiquan Lin, Ting Liu, Yuannan Zheng, Yong Sun, Guiyun Zhang, Qingzhao Li
Summary: Nuclear magnetic resonance (NMR) was used to study the pore structure of four types of coal samples and analyze the multifractal characteristics. The results showed that all coal samples were dominated by micropores and had similar multifractal characteristics, with a linear relationship between T-2 cutoff values and multifractal characteristic parameters. Models were developed to predict T-2 cutoff values with high accuracy.
Article
Chemistry, Physical
Lun Du, Guanghua Zhang, Shining Hu, Jie Luo, Wanbin Zhang, Ce Zhang, Junguo Li, Junfeng Zhu
Summary: Emulsified asphalt is an effective and low-cost modifier that can reduce the hydrophilicity of low rank coals and improve the preparation performance of coal water slurry. The modified coal has better adsorption ability for dispersants and exhibits characteristics similar to high rank coal.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Yi-Tong Wang, Di Gao, Ya-Nan Zeng, Jun-Guo Li, Ai-Min Ji, Tian-Ji Liu, Shuang Cai, Wen-Jie Cong, Fu-Ping Wang, Qing Yu, Xiao-Man Wang, Zhen Fang
Summary: A solid catalyst Na2CO3@EFD was prepared from electric furnace dust (EFD) and used for biodiesel production. The catalyst exhibited high activity and recyclability, enabling the production of biodiesel with high yield. The study demonstrates the feasibility of utilizing industrial solid waste for the green production of biodiesel.
JOURNAL OF CLEANER PRODUCTION
(2022)
Correction
Chemistry, Multidisciplinary
Junguo Li, Weifeng Lin, Yingjie Shao, Tianren Tang, Wei Qiang, Zhaohui Pan, Yuanhai Su, Minjing Shang
JOURNAL OF FLOW CHEMISTRY
(2022)
Article
Environmental Sciences
Fu-Ping Wang, Ya-Nan Zeng, Yi-Tong Wang, Jun-Guo Li, Xi Zhang, Ai-Min Ji, Le-Le Kang, Rui Ji, Qing Yu, Di Gao, Xiao-Man Wang, Zhen Fang
Summary: In this study, magnetic Fe-C composites (EFD&C) were prepared using reed straw and electric furnace dust waste to remove Cr(VI) from water. The EFD&C had a large specific surface area and porous structure, and showed efficient removal capacity for Cr(VI). The adsorption mechanism involved chemical adsorption by redox reaction and physical adsorption into the porous structure. This study provided a feasible solution for preparing adsorbents from iron-containing metallurgical solid waste and biomass waste, contributing to environmental pollution reduction and cost savings in adsorbent preparation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Fenghao Jiang, Daofan Cao, Yan Zhang, Shunxuan Hu, Xiaohe Huang, Yutian Ding, Changning Wu, Junguo Li, Yulong Ding, Ke Liu
Summary: Due to improper disposal, banana pseudo-stem has caused serious environmental problems and fungal diseases. High-pressure CO2-hydrothermolysis is an effective strategy for improving the combustion characteristics and emission analysis of banana pseudo-stem. The results of this study show that high-pressure CO2-hydrothermolysis can produce coal-like fuel with higher heating value and reduce carbon, sulfur, and nitrogen emissions.
Article
Energy & Fuels
Yujie Mei, Qiuyu Lin, Daofan Cao, Junguo Li, Ke Liu
Summary: This paper investigates the influence of high-shear pretreatment and polyvinylpyrrolidone (PVP) on the flotation performance of ultrafine coal slime (UCS). The results show that with the assistance of HSP and PVP, the flotation concentrate has less gangue entrainment, high combustible recovery, and low ash content.
INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION
(2023)
Article
Materials Science, Multidisciplinary
Xi Zhang, Hao Na, Pengyao Liu, Yajun Wang, Junguo Li, Qian Meng, Guopeng Li
Summary: Regulating the phase transformation from gamma to beta in dicalcium silicate (C2S) can enhance the hydration activity and recycling rate of AOD slag. This study presents a novel two-step gamma -> alpha '(L) -> beta phase transformation method in C2S, which transforms needle-like nanostructured gamma-C2S grains to lamellar-structured beta-C2S grains.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Thermodynamics
Fenghai Li, Wei Zhao, Junguo Li, Hongli Fan, Meiling Xu, Guopeng Han, Mingxi Guo, Zhiqing Wang, Jiejie Huang, Yitian Fang
Summary: This study investigates the influence of phosphogypsum (PG) on the coal ash fusion characteristics and analyzes the modifications of ash fusion temperature (AFT) for Xiaolongtan coal (XLT) and Jiaozuo coal (JZ) under a reducing atmosphere. The AFT of mixed XLT increases with increasing PG mass ratio, while the AFT decreases for JZ mixtures. The suitable PG mass ratios for XLT and JZ are 4.9%-8.9% and 6.5%-9.0%, respectively. The changes in AFT result from the variations in the base/acid ratio and the presence of different minerals in the ash. The AFT variation can also be explained by the variations in the temperature range and ash composition positions in the SiO2-Al2O3-CaO ternary phase diagram with increasing PG mass ratio.
Article
Materials Science, Multidisciplinary
Junguo Li, Xinyu Zhong, Guoqiang Luo, Qiwang Cai, Qiang Shen, Rong Tu, Xiaoping Guo, Renchi Ding
Summary: In this study, dense ZTA ceramics with high Cr2O3 content were prepared using spark plasma sintering, which inhibited the volatilization of Cr2O3. The addition of Cr2O3 improved the hardness and fracture toughness of the ceramics by regulating the grain size in the matrix. The optimum performance was achieved with a 5 wt% dosage of Cr2O3, resulting in the maximum values of Vickers hardness and fracture toughness.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Polymer Science
Junguo Li, Lei Pan, Shiquan Zhang, Jian Zhang, Minxian Shi, Qiang Shen
Summary: This study provides a novel phenolic resin composite with high thermal insulation capacity by introducing hollow silica microspheres as an insulation layer. The composites with microspheres exhibit high uniformity and improved bending strength. The introduction of microspheres also improves the thermal stability and reduces the back surface temperature during oxyacetylene ablation.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Green & Sustainable Science & Technology
Xiao-Man Wang, Ya-Nan Zeng, Yu-Ran Wang, Fu-Ping Wang, Yi-Tong Wang, Jun-Guo Li, Rui Ji, Le-Le Kang, Qing Yu, Tian-Ji Liu, Zhen Fang
Summary: To solve the resistance of biodiesel industrial production, researchers prepared the Na2CO3@BFD catalyst from blast furnace dust and used it to catalyze biodiesel production at low temperature, achieving a biodiesel yield of 99.04 wt%. The optimized conditions included a methanol/oil molar ratio of 13.72/1, catalyst dosage of 9.77 wt%, and temperature of 74.86 degrees C for 1.62 h. The study also found that temperature had the greatest influence on the reaction, followed by time, methanol/oil molar ratio, and catalyst dosage.
Article
Engineering, Chemical
Suogui Shang, Qiangyong Gao, Yunjiang Cui, Peichun Wang, Zhang Zhang, Yadong Yuan, Weichao Yan, Peng Chi
Summary: We proposed a low-cost and high-efficiency workflow for simulating the electrical properties of rocks under high-pressure and high-temperature conditions. This method accurately predicts the electrical characteristics of rocks and plays a key role in water saturation prediction.
Article
Agriculture, Dairy & Animal Science
Haitao Duan, Lizi Lu, Lei Zhang, Jun Li, Xu Gu, Junguo Li
Summary: The study aimed to assess the effects of Lactobacillus lactis supplementation on growth performance, hematological parameters, meat quality, and intestinal flora in pigs. The results showed that LL supplementation increased final body weight, average daily weight gain, average daily feed intake, and improved meat quality.
Article
Environmental Sciences
Xin Wang, Jingfeng Wang, Shanfa Zhang, Junguo Li
Summary: This study revealed that different nonliving marine diatom biomass could efficiently remove Cd(II), with nonliving Nitzschia possessing the highest adsorption capacity. The adsorption process was found to be spontaneous, endothermic, and involving chemisorption. Inorganic salts and turbidity had negative effects on Cd(II) adsorption, while humic acid had a positive effect. Additionally, leaching of organics during adsorption could also affect chemical bonds distribution on the biomass.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Materials Science, Ceramics
Shiquan Zhang, Jian Zhang, Suohui Yang, Minxian Shi, Junguo Li, Qiang Shen
Summary: A high flexural strength of 66.91 MPa was achieved in carbon fiber/boron phenolic resin (CF/BPR) composites modified by MoSi2 and mica, after ablation at 1500 degrees C. The addition of MoSi2 improved the reactivity of MoSi2 powders and provided a suitable interfacial state between CF and the matrix, resulting in improved ablation resistance. The oxygen-acetylene test showed reduced mass ablation and linear ablation rates of 0.034 g/s and 0.006 mm/s, respectively. These high-strength CF/BPR composites have strong potential in aerospace applications.
CERAMICS INTERNATIONAL
(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.