Article
Green & Sustainable Science & Technology
Janusz A. Lasek, Krzysztof Glod, Krzysztof Sowik
Summary: Municipal solid waste (MSW) can be a valuable energy source for power plants through co-combustion. Torrefaction of MSW reduces chlorine and mercury content, with pressurized combustion leading to lower emissions of NO and SO2. This study investigates the co-combustion of torrefied MSW and coal in a fluidised bed combustor under different conditions.
Article
Green & Sustainable Science & Technology
Guangqing Zhu, Yanhao Gong, Yanqing Niu, Shuai Wang, Yu Lei, Shi'en Hui
Summary: This study focused on the development of multi-air staging pulverized coal preheating-combustion technology and the optimization of burners to reduce NOx emissions during combustion. The results showed that the depth furnace air staging could further reduce NOx emissions, while the unburned carbon in fly ash presented an opposite tendency. Among the different burners tested, the high-speed axial jet burner showed the lowest NOx emissions under the multi-air staging preheating-combustion conditions.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
O. Karlstroem, E. Vainio, M. Engblom, A. Brink, M. Hupa
Summary: This study investigates the effect of air staging on NOx reduction in an industrial bubbling fluidized bed and finds that air staging can significantly reduce NOx emissions in biomass combustion systems.
Article
Energy & Fuels
Jingkun Han, Dunxi Yu, Jianqun Wu, Xin Yu, Fangqi Liu, Minghou Xu
Summary: Torrefaction has different effects on the ash slagging behavior during biomass and coal co-combustion. Co-firing biomass with high-Ca coal reduces the ash slagging rate, while co-firing biomass with high-Si/Al coal exacerbates the slagging tendency. Torrefaction can reduce the ash slagging rate of sawdust but increase it for other fuels. Measures such as optimizing operation conditions, co-firing with high-Ca coals, and using additives are suggested to alleviate the ash slagging during torrefied herbaceous biomass combustion.
Article
Energy & Fuels
Jingkun Han, Dunxi Yu, Jianqun Wu, Xin Yu, Fangqi Liu, Minghou Xu
Summary: Torrefaction technology has positive effects on ash fouling during biomass combustion and co-combustion. The interactions between fuels during co-combustion inhibit the formation of inside fouling deposits while the incorporation of alkalis in aluminosilicates promotes the growth of outside deposits. Torrefaction reduces the formation of chlorides and sulfates, thus inhibiting the inside deposition. However, the elemental repartitioning during torrefaction leads to more retention of alkalis, which aggravates the formation of mixed aluminosilicates and favors the outside deposition.
Article
Energy & Fuels
Tao Zhu, Xing Ning, Chunli Tang, Limin Wang, Lei Deng, Defu Che
Summary: The study reveals that in the cyclone barrel, regions with higher NOx concentration are mainly concentrated in the primary-air-controlled and near-wall areas. Appropriately delayed secondary air supply can effectively reduce the initial formation of NOx, and the central area of the cyclone barrel is the core region for NOx reduction. Increasing the velocity of secondary air significantly enlarges the central zone with a strong reducing atmosphere.
Article
Agricultural Engineering
Xiaochao Zhu, Shengquan Zhou, Ziqiang Zhang, Yonggang Zhang, Jian Li, Sarwaich Ahmed, Beibei Yan, Guanyi Chen, Ning Li
Summary: Flue gas torrefaction integrated with combustion proved to be an effective method for improving the physicochemical properties of distilled spirit lees (DSL). This process also reduced NOx emissions and lowered the costs of DSL drying and denitrification.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Xudong Yang, Zhongyang Luo, Bichen Yan, Yinchen Wang, Chunjiang Yu
Summary: This study investigated the migration and transformation of nitrogen during biomass torrefaction combined with coal co-combustion. The XPS analysis showed that torrefaction in CO2 suppressed the conversion of nitrogen components. Additionally, torrefaction in a N2/O2 atmosphere at a lower temperature improved biomass properties and reduced NO emissions during co-combustion.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
Taeyoung Chae, Jaewook Lee, Yongwoon Lee, Won Yang, Changkook Ryu
Summary: Reburning technology shows significantly better NOx reduction performance compared to cofiring, with reduction effectiveness up to 3.4 times greater. The highest NOx reduction per biomass unit occurs at lower reburning ratios, while increasing reburning ratios lead to a decrease in NOx abatement effectiveness in an exponential manner. Unlike cofiring, reburning is found to have little dependence on fuel characteristics when it comes to NOx abatement potential.
Article
Engineering, Environmental
Jinhao Zheng, Lei Liao, Rui Liu, Chongcong Li, Yan Zhang
Summary: This study explored a promising approach to co-manage torrefaction condensates (TCs) and carbon-rich fly ash (FA), finding that the blending of FA and TC improved CO2 gasification reactivity and combustion performance of the resulting mixtures.
Article
Energy & Fuels
Yanquan Liu, Wenyi Tan, Shaohua Liang, Xiaolong Bi, Rongyue Sun, Xiaojun Pan
Summary: Co-combustion of torrefied cornstalk with different rank coals can decrease the ignition temperatures of coals and exhibit both synergistic and anti-synergistic interactions. The coal/torrefied cornstalk blends show better combustion performance and lower NOx and SO2 emissions than pure coals.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Thermodynamics
Wenlei Zhou, Fuyong Su, Lei Zhang, Taotao Li
Summary: A novel triple air-staged combustion with internal flue gas recirculation was proposed to achieve low NOx emissions and high combustion efficiency. The effects of different air vent structural parameters on NOx emissions and thermal efficiency were analyzed through numerical simulation.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Amanda Alves Domingos Maia, Yemall Alexander Maigual Enriquez, Leandro Cardoso de Morais
Summary: The study on Capsicum waste biomass for potential biofuel production showed promising results in terms of thermal behavior, chemical characteristics, and economic potential.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Tao Zhu, Chunli Tang, Xing Ning, Limin Wang, Lei Deng, Defu Che
Summary: The NOx formation characteristics of Zhundong coal in a cyclone furnace were experimentally investigated in this study. The key to reducing NOx emissions in the cyclone furnace is to create a strong reducing atmosphere. Lowering the primary air rate and avoiding centralized air supply can effectively reduce NOx formation. The near-wall zone in the cyclone barrel has higher NOx formation due to elevated O-2 concentration.
Article
Thermodynamics
Xinzhuo Li, Minsung Choi, Chanho Jung, Yeseul Park, Gyungmin Choi
Summary: Experiments were conducted to investigate the impact of the staging air-LPG mixing ratio and staging position on the emissions and burnout performance of LPG and coal under cofiring conditions. The findings revealed that supplying the air-LPG mixture at a mixing ratio of 20% or 30% and staging it upstream of the primary combustion zone had a synergistic effect on reducing CO and NO emissions while improving burnout performance.
Article
Green & Sustainable Science & Technology
Rohan Stanger, Terry Wall, Reinhold Spoerl, Manoj Paneru, Simon Grathwohl, Max Weidmann, Guenter Schefflmecht, Denny McDonald, Kari Myohanen, Jouni Ritvanen, Sirpa Rahiala, Timo Hyppanen, Jan Mletzko, Alfons Kather, Stanley Santos
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2015)
Article
Agricultural Engineering
A. Funke, A. Niebel, D. Richter, M. M. Abbas, A. -K. Mueller, S. Radloff, M. Paneru, J. Maier, N. Dahmen, J. Sauer
BIORESOURCE TECHNOLOGY
(2016)
Article
Chemistry, Applied
Reinhold Spoerl, Manoj Paneru, Selahattin Babat, Gosia Stein-Brzozowska, Joerg Maier, Guenter Scheffknecht
FUEL PROCESSING TECHNOLOGY
(2016)
Article
Chemistry, Applied
Manoj Paneru, Selahattin Babat, Joerg Maier, Guenter Scheffknecht
FUEL PROCESSING TECHNOLOGY
(2016)
Article
Chemistry, Applied
Anders Brink, Daniel Lindberg, Mikko Hupa, Marta Escoto de Tejada, Manoj Paneru, Joerg Maier, Guenter Scheffknecht, Alessandro Pranzitelli, Mohamed Pourkashanian
FUEL PROCESSING TECHNOLOGY
(2016)
Article
Energy & Fuels
Manoj Paneru, Gosia Stein-Brzozowska, Joerg Maier, Guenter Scheffknecht
Article
Energy & Fuels
Tefera Zelalem Tumsa, Tae Young Chae, Won Yang, Manoj Paneru, Joerg Maier
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(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.