Article
Energy & Fuels
Aiguo Liu, Ruiyang Fan, Qiaochu Liu, Lei Xi, Wen Zeng
Summary: This study focuses on the impact of fuel/air mixing on combustion performance in a DLE combustor, with results showing that fuel nozzle position has little effect on mixing uniformity, but optimal fuel nozzle diameters are crucial for generating suitable fuel jet momentum for the mixing process.
Article
Thermodynamics
Guangya Zhu, Tin-Tai Chow, Chun-Kwong Lee
Summary: The integration of biogas-fueled Maisotsenko combustion turbine cycle (MCTC) system offers significant advantages in improving system efficiency and cycle efficiency, with lower sensitivity to the methane content in biogas.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Hong Liu, Zhuoxiong Zeng, Kaifang Guo
Summary: The effects of secondary oxygen ratio and secondary fuel ratio on combustion characteristics and emissions of a micro gas turbine combustor were investigated through numerical simulation. It was found that increasing the secondary oxygen ratio can reduce NO emissions, while increasing the secondary fuel ratio improves combustion efficiency.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Mohsen Broumand, Muhammad Shahzeb Khan, Sean Yun, Zekai Hong, Murray J. Thomson
Summary: This study examines the feasibility of using FPBO made from non-food woody biomass in a micro-gas turbine, showing challenges in achieving stable flame with 100% FPBO due to fuel polymerization, which can be addressed by adding EtOH to improve volatility. The internally-mixed nozzle demonstrated cleaner emissions and required less EtOH addition for stabilization compared to the externally-mixed one. Injector modification or fuel upgrading is necessary prior to the deployment of FPBO in replacing fossil oils.
Article
Engineering, Aerospace
Shipeng Sun, Qing Wang, Xinmin Wang, Chunlei Wu, Xu Zhang, Jingru Bai, Baizhong Sun
Summary: This research aims to use biodiesel in an unconventional micro gas turbine engine, with the purpose of improving fuel efficiency and increasing power production. Before widespread use, the biodiesel needs to be experimentally tested for performance, emission, and combustion analysis.
AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Xiaoyu Chen, Weiguo Zhou, Yunfei Jia, Junying Tang
Summary: This study investigated the combustion performance of biogas in a micro gas turbine through numerical simulation, finding that increasing CO2 percentage in biogas leads to lower NO and CO emissions, but higher fuel rate and pressure drop in the combustion chamber. The study also revealed that higher excess air coefficient results in lower average temperature of the entire combustor.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Bahamin Bazooyar, Hamidreza Gohari Darabkhani
Summary: The study focuses on the design and application of biogas in micro gas turbines for achieving zero carbon emissions by 2050. Successful design of a micro gas turbine combustor requires consideration of NOx emissions, combustion efficiency, and sudden changes in engine load.
Article
Chemistry, Multidisciplinary
Mochammad Faqih, Madiah Binti Omar, Rosdiazli Ibrahim, Bahaswan A. A. Omar
Summary: This paper reviews the development and challenges of the dry-low emission (DLE) gas turbine, discusses various gas turbine models, and explores the working principles, advantages, and common faults of DLE gas turbines. It also highlights the assessment of lean blow-out (LBO) as a major fault and introduces current methods for LBO prediction.
APPLIED SCIENCES-BASEL
(2022)
Article
Thermodynamics
Hong Liu, Zhuoxiong Zeng, Kaifang Guo
Summary: The study shows that swirl angle and hydrogen mixing ratio have a significant impact on the performance of micro gas turbine combustor. Increasing swirl number decreases temperature and NO emissions, while higher hydrogen content in the fuel changes temperature distribution and pollutant emissions levels.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
(2022)
Article
Thermodynamics
Alessio Pappa, Marie Cordier, Pierre Benard, Laurent Bricteux, Ward De Paepe
Summary: This paper investigates the combustion performance of micro gas turbines under diluted conditions. By utilizing cycle humidification and exhaust gas recirculation, stable and complete combustion is achieved in diluted cases with water and/or CO2.
Article
Energy & Fuels
Yuhao Sun, Yanfei Zhang, Mingming Huang, Qin Li, Wenling Wang, Dapeng Zhao, Shen Cheng, Haoxin Deng, Jianji Du, Yang Song, Huaijing Li, Hongyao Xu
Summary: The influence of hydrogen addition on the combustion and emission characteristics of laminar-premixed methane flame under gas turbine relevant operating conditions was studied. The results show that hydrogen addition increases flame temperature and burning velocity, while increasing NO emissions and reducing CO formation.
Article
Thermodynamics
I. Ibrahim Enagi, K. A. Al-attab, Z. A. Zainal, Yew Heng Teoh
Summary: Micro gas turbine (MGT) is a promising option for green distributed cogeneration, and it can utilize a wider range of renewable fuel sources. A new chamber geometry was designed and tested for liquid biofuels combustion. The system achieved an overall efficiency of 24.7% and demonstrated low NOx emissions with palm biodiesel in the lab-scale combined heat and power (CHP) configuration.
Article
Energy & Fuels
Mustafa Ilbas, Nurhan Uregen Guler, Murat Sahin
Summary: This study focuses on the combustion characteristics of biogas under different oxidizers in a swirl combustor. The results show similar trends in temperature distributions between experimental measurements and numerical predictions when using different oxidizers. Combustion using 100% O2 is found to have higher temperature values, starting faster and more efficiently.
Article
Engineering, Environmental
E. Gholamian, A. S. Mehr, M. Yari, J. G. Carton
Summary: Hydrogen injection into biogas can generate electricity for a deployed wastewater treatment plant. The research found that injecting hydrogen into biogas effectively reduces CO2 emissions and improves power generation efficiency. A polymer electrolyte membrane electrolyzer powered by photovoltaic panels produces hydrogen, while commercialized micro gas turbines generate electricity and thermal energy.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Energy & Fuels
Zhongya Xi, Zundi Liu, Xiaoxiang Shi, Tianyou Lian, Xiaoyuan Yang, Jianguo Zhang, Bowen Mei, Yuyang Li
Summary: Adding dimethyl ether (DME) to biogas can improve flame stability and combustion intensity, while increasing CO2 content can raise the lean blowout limit. DME co-firing increases NO emissions, while increasing CO2 content decreases NO emissions.
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.