Article
Thermodynamics
Min Xu, Peng Jiang, Wenjun Zhong, Xu Liu, Qian Wang
Summary: The study investigates the soot characteristics of hydrogenated catalytic biodiesel mixed with n-butanol. The results show that under steady-state conditions, the formation and oxidation processes are mainly controlled by the soot peak of the spray head. Under transient-state conditions, there is a competition between high-temperature flames and low-temperature flames.
Article
Green & Sustainable Science & Technology
Jing Li, Yifei Liang, Shuo Wang, Shaohua Wu, Wenming Yang, Rui Liu
Summary: In this study, the blending of n-octanol with biodiesel was investigated to improve combustion characteristics and reduce emissions in a diesel engine. The simulations showed that blending more n-octanol could lead to a longer ignition delay, lower NOx emissions, higher power output, and decrease in soot emissions. B20/O80 blends were found to achieve more efficient and cleaner combustion in the diesel engine.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Qiankun Zhang, Jin Xia, Jianping Wang, Zhuoyao He, Yong Qian, Xingcai Lu
Summary: The study aims to explore the spray and combustion characteristics of collision biodiesel and butanol under different collision angles, injection pressures, and ambient conditions. The results show that the spray in the horizontal direction has faster evaporation and diffusion rates compared to the vertical direction. Increasing the ambient temperature has a positive impact on promoting the horizontal diffusion of the vapor-phase spray. At larger collision angles, higher relative velocity leads to a more intense collision process and smaller diffusion rate after the collision. A smaller equivalence ratio after the collision leads to longer ignition delay and shorter flame lift-off length, contributing to a more intense combustion process and higher soot emissions. Increasing the injection pressure can improve the ignition and combustion characteristics, except at larger collision angles where the reduction in soot emissions is suppressed.
Article
Thermodynamics
Tiemin Xuan, Zhongcheng Sun, Ahmed I. EL-Seesy, Yonggang Mi, Wenjun Zhong, Zhixia He, Qian Wang, Jianbing Sun, Hesham M. El-Batsh, Jiawei Cao
Summary: The study investigates the spray and flame characteristics of methanol and HCB blended fuels, showing an increase in liquid length with higher methanol content and a decrease in in-flame soot production with additional methanol due to leaner fuel combustion and higher oxygen content within the blends.
Article
Multidisciplinary Sciences
Ahmed EL-Seesy, Mahmoud S. Waly, Alhassan Nasser, Radwan M. El-Zoheiry
Summary: This research aimed to improve the applicability of methanol in CI engines by using n-decanol as a cosolvent. The study found that the combinations of pure methanol or hydrous-methanol with diesel were unstable, and n-decanol was used to enhance stability. The combustion and emissions characteristics of different proportions of methanol-diesel mixtures with n-decanol were evaluated, and the results showed changes in in-cylinder pressure, heat release rate, pressure rise rate, brake thermal efficiency, specific fuel consumption, and emissions compared with diesel.
SCIENTIFIC REPORTS
(2022)
Article
Thermodynamics
Ahmed EL-Seesy, Mahmoud S. Waly, Zhixia He, Hesham M. El-Batsh, Alhassan Nasser, Radwan M. El-Zoheiry
Summary: Methanol is considered a promising renewable fuel for diesel engines, but faces challenges due to phase separation, low cetane number, and high latent heat of vaporization. This study aimed to improve methanol's usability in diesel engines by using n-octanol and diethyl ether as cosolvents and ignition improvers. The addition of n-octanol improved solubility, but the blends showed lower cylinder pressure and thermal efficiency compared to waste cooking oil biodiesel alone. Engine emissions of nitrogen oxide levels decreased with the blends, but carbon monoxide and smoke opacity increased.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Tahereh Nematian, Milad Fatehi, Morteza Hosseinpour, Mohammad Barati
Summary: Fatty acid methyl esters (FAMEs) and H-2 were produced from sesame cake using alumina supported CaO and MgO nanoparticles in a supercritical mixture of methanol and water. The catalysts significantly influenced gas production, with MgO/gamma-Al2O3 showing the highest amount of H-2, CO, and CO2 production, while CaO/gamma-Al2O3 performed best for biodiesel production. Additionally, a method using a Soxhlet apparatus and CO2 gas flow system was implemented to reduce nitrogenate content in the liquid fuel, with N-contents of the liquid products reduced by up to 65.2%.
Article
Engineering, Chemical
Jing Li, Dajian Wang, Cong Zhuang, Shiqi Gong, Songhong Li
Summary: The reactivity-controlled compression ignition engine fueled with n-butanol/n-octanol was studied numerically using the KIVA-CHEMKIN code. The effects of premixed n-butanol percentage and intake valve close timing on combustion characteristics and emissions formations were investigated. It was found that increasing the premixed n-butanol percentage and retarding the intake valve close timing can mitigate knocking and improve engine performance.
Article
Energy & Fuels
V Praveena, Leenus Jesu Martin, Edwin Geo Varuvel
Summary: The study analyzed the effects of grapeseed biodiesel and higher order alcohol on combustion and emission parameters of a diesel engine, finding that adding 20% butanol to grapeseed biodiesel can reduce waste and provide a cheaper energy source.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Energy & Fuels
Ganesha Thippeshnaik, Sajjal Basanna Prakash, Ajith Bintravalli Suresh, Manjunath Patel Gowdru Chandrashekarappa, Olusegun David Samuel, Oguzhan Der, Ali Ercetin
Summary: This study investigates the effects of ternary fuel blends containing higher alcohols on the performance, combustion, and emissions of compression ignition engines. The experimental results show that compared to binary blends, ternary blends with 1-heptanol and n-octanol exhibit better fuel consumption, thermal efficiency, and peak heat release rate, while reducing the emissions of carbon monoxide and unburned hydrocarbons.
Article
Environmental Sciences
Jinglan Wang, Lifang Sun, Pengpeng Luan, Yangyi Wu, Zhanjun Cheng, Zhao Zhang, Xiangen Kong, Haifeng Liu, Guanyi Chen
Summary: This study investigates the combustion characteristics, fuel economy, and emission characteristics of two potential oxygen-containing alternative fuels, DNBE and 1-octanol, blended into diesel. The results show that different blending ratios of 1-octanol exhibit different combustion characteristics in the cylinder. Economic analysis reveals that the specific fuel consumption of DNBE-diesel blend fuels is higher than that of 1-octanol-diesel blend fuels, while the thermal efficiency is the opposite. The emissions of NOx, HC, and CO are influenced by the types of blend fuels, blending ratios, and loads.
ENVIRONMENTAL POLLUTION
(2022)
Article
Energy & Fuels
Qiwei Wang, Jimin Ni, Rong Huang
Summary: This study examines the effects of different oxygenated fuels on engine combustion and emissions performance. It was found that introducing n-octanol improves heat release rate, while ME and DMC decrease it. When it comes to emissions, NO45 has the lowest carbon monoxide emissions, followed by ME13, DMC8, and D100. The use of oxygenated fuels greatly reduces soot emissions.
Article
Chemistry, Applied
Zhenyang Ming, Bo Liu, Xuan Zhang, Mingsheng Wen, Haifeng Liu, Yanqing Cui, Ying Ye, Can Wang, Chao Jin, Abdulfatah Abdu Yusuf, Ephraim Bonah Agyekum
Summary: This study investigates the flame structure, soot formation, and combustion stability of methanol spray flames compared to conventional fuels. Results show that methanol spray flames exhibit different characteristics and less combustion stability compared to other fuels.
FUEL PROCESSING TECHNOLOGY
(2023)
Review
Chemistry, Inorganic & Nuclear
Vishakha Goyal, Naina Sarki, Anand Narani, Ganesh Naik, Kishore Natte, Rajenahally V. Jagadeesh
Summary: N-methylamine functionalities play vital roles in various fields, including life science applications and functional materials. N-methylations are important reactions in organic synthesis and drug discovery. Using methanol as a methyl source provides a convenient and sustainable method for N-methylation. This review discusses the recent progress in catalytic N-methylation using methanol as a key C1 source, with a focus on the synthesis of N-methylamines and related bioactive compounds.
COORDINATION CHEMISTRY REVIEWS
(2023)
Article
Energy & Fuels
Wenjun Zhong, Feibin Yan, Jing Wang, Wenli Gao, Guisheng Xu, Zhixia He, Lun Hua, Qian Wang
Summary: A comparative study was conducted on the combustion and emission performance of fatty acid methyl ester/diesel and hydrogenated catalytic biodiesel/diesel blends in light-duty engines. The results showed that D80H20 had better economy compared to D100, but emission issues cannot be ignored. Model 11 performed the best from a combined economy and emission characteristics perspective.
Article
Thermodynamics
Manzoore Elahi M. Soudagar, Asif Afzal, Mohammad Reza Safaei, A. Muthu Manokar, Ahmed EL-Seesy, M. A. Mujtaba, Olusegun David Samuel, Irfan Anjum Badruddin, Waqar Ahmed, Kiran Shahpurkar, Marjan Goodarzi
Summary: In this study, experiments were conducted to prepare biodiesel from cottonseed oil and blend it with octanol, with the added improvement of thermal and mass transfer characteristics through functionalized multi-walled carbon nanotubes (MWCNTs). The performance analysis showed that adding octanol and MWCNT nanoparticle can stabilize fuel consumption rate and increase brake thermal efficiency.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Correction
Thermodynamics
Manzoore Elahi M. Soudagar, Asif Afzal, Mohammad Reza Safaei, A. Muthu Manokar, Ahmed I. EL-Seesy, M. A. Mujtaba, Olusegun David Samuel, Irfan Anjum Badruddin, Waqar Ahmed, Kiran Shahapurkar, Marjan Goodarzi
Summary: This passage mentions the issue of incorrect publication of the affiliations of authors in an article.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Construction & Building Technology
Ali Radwan, Takao Katsura, Lan Ding, Ahmed A. Serageldin, Ahmed EL-Seesy, Katsunori Nagano
Summary: This article presents a new type of CRCP based on multi-segmented mini-channels, which achieves higher cooling capacity and lower power consumption compared to the traditional flat sheet-and-tube panels. By inclining and increasing the area, the new design significantly enhances the cooling capacity at the same indoor temperature.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Thermodynamics
M. S. Gad, Zhixia He, A. S. El-Shafay, Ahmed El-Seesy
Summary: This study investigated the impact of blending mandarin essential oil with diesel fuel on engine performance under various loads and a fixed speed. Experimental results showed that adding mandarin essential oil can reduce emissions and fuel consumption, but increase NOx emissions. Simulation results indicated that the EGR approach effectively reduces NOx levels with minimal impact on soot levels.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
M. S. Gad, Ahmed I. EL-Seesy, Hassan M. Abu Hashish, Zhixia He, W. G. Alshaer
Summary: This study focuses on the preparation of biodiesel from Egyptian sheep fat oil, with experiments showing that the B20 mixture significantly improves engine performance and emissions compared to base fuel.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
P. A. Harari, N. R. Banapurmath, V. S. Yaliwal, Manzoore Elahi M. Soudagar, T. M. Yunus Khan, M. A. Mujtaba, Mohammad Reza Safaei, Naveed Akram, Marjan Goodarzi, Ashraf Elfasakhany, Ahmed EL-Seesy
Summary: The study showed that adding 10% pentanol in the fuel is beneficial for increasing the brake thermal efficiency of diesel and pentanol fuel combination in RCCI mode, while reducing nitrogen oxide and smoke emissions.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Ali M. A. Attia, A. R. Kulchitskiy, Mohamed Nour, Ahmed El-Seesy, Sameh A. Nada
Summary: The study investigates the impact of castor methyl ester (CME) biodiesel blending ratio on the composition of diesel particulate matters (DPM). By using a mathematical model, the study empirically predicts the structure of DPM emissions, and the results suggest that using B10 blend biodiesel provides the best economic and emission performance.
Article
Energy & Fuels
Mohamed Nour, Zhe Sun, Ahmed El-Seesy, Xuesong Li
Summary: This study investigated the impact of substituting commercial diesel fuel with n-hexanol in DICI engines on combustion, performance, and emission characteristics. Results showed that n-hexanol addition to diesel improved ignition delay, combustion mode, and reduced emissions. However, the brake thermal efficiency for n-hexanol-diesel blends was slightly lower compared to commercial diesel, with higher fuel consumption.
Article
Energy & Fuels
Sabariswaran Kandasamy, Bo Zhang, Zhixia He, Narayanamoorthy Bhuvanendran, Ahmed I. EL-Seesy, Qian Wang, Mathiyazhagan Narayanan, Palaniswamy Thangavel, Mudasir A. Dar
Summary: Microalgal feedstocks have shown great potential for sustainable biofuel production, with researchers focusing on hydrothermal liquefaction. By converting solar energy into carbon storage compounds, microalgae can be used to produce biodiesel, bioethanol, and bio-methanol, making it an attractive source for biofuel production. Additionally, the analysis of oil content, chemical composition, and lipid content of microalgae provides insight into their potential for biofuel conversion and other value-added products.
Article
Green & Sustainable Science & Technology
Hany S. EL-Mesery, Ahmed EL-Seesy, Zicheng Hu, Yang Li
Summary: This review provides comprehensive information on the design and applications of solar dryers, as well as the challenges and advancements in large-scale solar energy drying. It offers valuable insights for the development of sustainable food drying technology.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Green & Sustainable Science & Technology
Ahmed I. EL-Seesy, Mahmoud S. Waly, Zhixia He, Hesham M. El-Batsh, Alhassan Nasser, Radwan M. El-Zoheiry
Summary: This research aimed to improve the applicability of methanol in CI engines by using n-octanol, diethyl ether, and nanoparticle additives. The results showed that these additives enhanced the stability, combustion, and emission characteristics of the methanol-diesel blends.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Multidisciplinary
Ibham Veza, Asif Afzal, M. A. Mujtaba, Anh Tuan Hoang, Dhinesh Balasubramanian, Manigandan Sekar, I. M. R. Fattah, M. E. M. Soudagar, Ahmed EL-Seesy, D. W. Djamari, A. L. Hananto, N. R. Putra, Noreffendy Tamaldin
Summary: Artificial Neural Network (ANN) is considered as a beneficial prediction tool in automotive applications, especially when the system is complicated and costly to model using simulation programs. However, further examination and improvement are required for the use of ANN in engine applications.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
K. A. Sateesh, V. S. Yaliwal, Manzoore Elahi M. Soudagar, N. R. Banapurmath, H. Fayaz, Mohammad Reza Safaei, Ashraf Elfasakhany, Ahmed EL-Seesy
Summary: The study investigates the impact of nanofluids using Al2O3 nanoparticles on diesel engine performance, showing an improvement in engine efficiency and a reduction in harmful emissions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Multidisciplinary
Tianyi Cao, Zhixia He, Ahmed EL-Seesy, Wei Guan, Qian Wang
Summary: Spray developments in diesel nozzles are largely affected by internal flow characteristics. An experimental system with transparent nozzles was built to study the cavitation phenomena in CI nozzles with enlarged scales and continuous bubbles. The study found that string cavitation development is similar across different scales and that bubbles enhance cavitation intensity and spray cone angle. Continuous bubbles were also found to significantly impact string cavitation compared to geometry-induced cavitation.
ATOMIZATION AND SPRAYS
(2021)
Article
Green & Sustainable Science & Technology
Mohamed Nour, Ahmed Elseesy, Ali Attia, Xuesong Li, Sameh Nada
Summary: Diesel engines play a crucial role in transportation, and ternary blends of alcohol, biodiesel, and diesel show potential for improving engine combustion and emissions. This study found that adding n-heptanol to the fuel mix resulted in significant reductions in emissions, demonstrating the effectiveness of this approach for cleaner and more efficient diesel engine operation.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2021)
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.