Article
Thermodynamics
Joanna Grochowalska, Piotr Jaworski, Lukasz Jan Kapusta, Jerzy Kowalski
Summary: This paper aims to develop a model of diesel fuel spray for the early stage of fuel spray in marine diesel engines, considering technical aspects such as nozzle diameter and backpressure. Experimental studies were conducted to propose a new model for fuel spray parameters, with lower error than existing models. The research highlights the importance of the early stage of fuel spray evolution for self-ignition in marine diesel engines.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2022)
Review
Green & Sustainable Science & Technology
Djati Wibowo Djamari, Muhammad Idris, Permana Andi Paristiawan, Muhammad Mujtaba Abbas, Olusegun David Samuel, Manzoore Elahi M. Soudagar, Safarudin Gazali Herawan, Davannendran Chandran, Abdulfatah Abdu Yusuf, Hitesh Panchal, Ibham Veza
Summary: Research and development in the internal combustion engine have been growing, and diesel engines have advantages in efficiency, power output, and reliability. Although observing diesel spray is complex due to its high-speed, high-pressure, and high-temperature conditions, some mechanisms have been explained and suggestions have been made. This paper comprehensively reviews the current status of theoretical diesel spray and modeling.
Article
Energy & Fuels
Zhijie Zhu, Xingyu Liang, Lei Cui, Kun Wang, Xiaohui Wang, Shihao Zhu
Summary: Currently, most ships still rely on fossil fuels as the main source for marine engines. However, diesel as a fuel for marine engines is no longer sufficient to meet the economic requirements of shipping and emission restrictions imposed by regulations. This research examined the viability of employing hydrogen-carrying fuel ammonia (NH3) in marine engines to develop a low-carbon combustion technology, to address the carbon emission problem of marine diesel engines.
Article
Environmental Sciences
Seongho Jeong, Jan Bendl, Mohammad Saraji-Bozorgzad, Uwe Kaefer, Uwe Etzien, Julian Schade, Martin Bauer, Gert Jakobi, Juergen Orasche, Kathrin Fisch, Paul P. Cwierz, Christopher P. Rueger, Hendryk Czech, Erwin Karg, Gesa Heyen, Max Krausnick, Andreas Geissler, Christian Geipel, Thorsten Streibel, Juergen Schnelle-Kreis, Martin Sklorz, Detlef E. Schulz-Bull, Bert Buchholz, Thomas Adam, Ralf Zimmermann
Summary: The emissions of marine diesel engines have significant impact on human health and climate change. The use of wet scrubbers can effectively reduce sulfur dioxide (SO2) emissions, but it has limited effect on the concentration of respirable particulate matter. Therefore, additional abatement systems need to be used to reduce particle emissions.
ENVIRONMENTAL POLLUTION
(2023)
Article
Energy & Fuels
Yimeng Li, Peng He, Zhaofei Li, Hao Xu, Jack Jarvis, Shijun Meng, Hua Song
Summary: This study demonstrates that the catalytic desulfurization of marine diesel oil can be enhanced by using Ga-Mo/UZSM-5 as the catalyst in a methane environment, leading to higher sulfur conversion rates and liquid product yields.
Article
Thermodynamics
Mahmut Uyar, Huseyin Aydin
Summary: In this study, a diesel-like fuel was produced from crude oil sludge using catalytic pyrolysis. The fuel went through two stages of desulfurization, resulting in a significant reduction in sulfur content. The obtained fuels were found to be suitable for use in diesel engines without requiring any engine modifications.
Article
Green & Sustainable Science & Technology
Tomasz Kniaziewicz, Ryszard Zadrag, Artur Bogdanowicz
Summary: The article presents the ecological characteristics of the Sulzer 6AL20/24 marine diesel engine fueled by a blend of n-butane and marine fuel, and discusses the selection of fuel blend composition and production methods. By analyzing experimental data, neural networks model and multiple regression models were built to solve the problem of selecting n-butanol content in the fuel blend for a specific engine.
Article
Energy & Fuels
Joseba Castresana, Gorka Gabina, Leopoldo Martin, Aingeru Basterretxea, Zigor Uriondo
Summary: Recent marine incidents have been partly caused by propulsion issues. Engine modelling techniques, specifically Artificial Neural Networks (ANN), have become an area of interest due to their accuracy and fast calculation times. However, most research has focused on predicting specific parameters for certain operation points. This study aimed to analyze the generalization capability of ANN in predicting multiple outputs in real engine conditions and successfully predicted 35 different performance and emission parameters.
Article
Engineering, Marine
Michal Puskar, Pavol Tarbajovsky, Matus Lavcak, Marieta Soltesova
Summary: The International Maritime Organisation sets standards to limit harmful emissions produced by marine ancillary diesel engines. To meet these restrictions, new alternative fuels have been introduced and experiments have been conducted to investigate their influence on engine operation.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Minsen Zhao, Min Kuang, Sili Wu, Xuehui Hu, Guohua Yang
Summary: Using ASPEN PLUS simulations, the study investigated the effects of configurational parameters on desulfurization efficiency in a packing scrubber for marine diesel engines. It was found that the seawater/lye cascade-scrubbing model could achieve significant reductions in seawater and alkali consumption compared to traditional models, under certain conditions.
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Peihua Han, Andre Listou Ellefsen, Guoyuan Li, Vilmar Aesoy, Houxiang Zhang
Summary: Maintenance is crucial for safe and efficient operation of marine vessels. Prognostics and Health Management has emerged as an optimal way to manage maintenance operations, successfully applied to marine diesel engines with high accuracy in predicting remaining useful life.
IEEE SENSORS JOURNAL
(2021)
Article
Thermodynamics
Vladimir Markov, Bowen Sa, Sergey Devyanin, Leonid Grekhov, Vsevolod Neverov, Jianhui Zhao
Summary: Vegetable oil-based biofuels, such as DF and RO, show promise as carbon-neutral alternatives to fossil fuels. This study focuses on comparing the injection and spray characteristics of DF and RO, as well as their relationship with emission formation. The results suggest that RO has lower injection velocity and TKE compared to DF. Increasing the RO content leads to changes in spray angle, spray tip penetration, SMD, and the mass fraction of fuel injected onto the combustion chamber walls. Additionally, a correlation is found between NOx emissions and SMD.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Van Chien Pham, Van Vang Le, Siljung Yeo, Jae-Hyuk Choi, Won-Ju Lee
Summary: This study investigated the impact of the injector spray angle on the combustion and emissions of a natural gas-diesel dual-fuel marine engine. It successfully identified the optimal spray angle for reducing exhaust gas emissions without affecting engine performance. Simulation results were consistent with experimental data.
APPLIED SCIENCES-BASEL
(2022)
Article
Energy & Fuels
Nguyen Van Duc Long, Dong Young Lee, Myung Jin Kim, Choongyong Kwag, Young Mok Lee, Ki Joon Kang, Sung Won Lee, Moonyong Lee
Summary: Square-shaped absorption towers are used in ships to install closed-loop flue gas desulfurization systems efficiently. Diluted NaOH solution is used as absorbent for marine sulfur oxides removal, achieving high removal efficiency while reducing costs and increasing efficiency.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Thermodynamics
Rui Liu, Li Huang, Yue Ma, Dehao Ju, Mingzhi Feng, Xingcai Lu
Summary: Extensive research has been conducted on the evolution of diesel spray, with most studies focusing on injectors with small nozzle diameter in land-based diesel engines. However, there is a lack of studies on marine diesel engines, which have larger mass flow rates and longer injection durations with large nozzle diameters. This study investigated the influence of injection pressure, ambient temperature, ambient density, and nozzle diameter on spray morphology for medium speed marine diesel engine injectors. The results show that injection pressure mainly affects vapor penetration velocity, while ambient temperature has a significant effect on liquid penetration length.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
(2023)
Article
Engineering, Chemical
Antonio Coppola, Aida Sattari, Fabio Montagnaro, Fabrizio Scala, Piero Salatino
Summary: This article focuses on the CO2 uptake performance and attrition/fragmentation tendency of sorbents in a dual interconnected fluidized bed system when simulating the conditions of a sorption-enhanced gasification process. The experiments were conducted on a commercial Italian limestone in a laboratory-scale reactor. The results show that the temperature and presence of steam have an influence on the sorption performance. Additionally, the impact fragmentation tests reveal the relationship between the sample's fragmentation characteristics and the preprocessing conditions in the fluidized bed.
Article
Energy & Fuels
Piotr Sakiewicz, Marcin Lutynski, Jakub Sobieraj, Krzysztof Piotrowski, Francesco Miccio, Sylwester Kalisz
Summary: A new method of using waste ashes from biomass combustion as a carbon dioxide sorbent has been proposed. The addition of nano-structural additives significantly increased the sorption capacity of the ashes, leading to the production of useful adsorbents in the circular economy process.
Article
Chemistry, Physical
Elettra Papa, Elena Landi, Francesco Miccio, Valentina Medri
Summary: This paper presents the production of four near-net shaped foams through direct foaming using different blowing agents. The results show that the porosity of the foams can be changed by using hydrogen peroxide or metallic silicon. Gas permeability tests indicate a correlation between the pore features and the processing methods applied. The study suggests that these geopolymer foams can be used in various applications.
Article
Thermodynamics
Chanoknunt Khaobang, Prysathryd Sarabhorn, Chootrakul Siripaiboon, Fabrizio Scala, Chinnathan Areeprasert
Summary: The combined pyrolysis and decoupling gasification process shows great potential in reducing costs and increasing energy recovery efficiency for e-waste recycling and metal recovery.
Article
Engineering, Chemical
Antonio Coppola, Fabrizio Scala, Mehdi Azadi
Summary: This study evaluated the direct dry mineral carbonation of selected mining and industrial wastes using carbon dioxide from combustion flue gas. The experimental results showed a low but appreciable CO2 capture capacity for three of the tested materials, suggesting the potential for recycling mining waste and offsetting carbon emissions in the mining industry.
Article
Biotechnology & Applied Microbiology
Elvis Tinashe Ganda, Paola Brachi, Massimo Urciuolo, Renata Migliaccio, Antonio Coppola, Fabrizio Scala, Piero Salatino, Giovanna Ruoppolo
Summary: The effects of light and mild torrefaction on the fluidized bed fast pyrolysis of residual olive stone were investigated. It was found that higher torrefaction temperature led to decreased yield and increased higher heating value, as well as increased phenolic and aromatic derivatives in the bio-liquids.
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
(2023)
Article
Energy & Fuels
Francesco Miccio
Summary: This study investigates the use of carbonaceous materials as thermoelectric materials for micro-generation at high temperature. The results demonstrate a significant increase in electromotive force under hot conditions with flame irradiation, confirming the possibility of generating an electrical peak in a self-sufficient combustion thermoelectric device.
Article
Energy & Fuels
Roberto Chirone, Andrea Paulillo, Antonio Coppola, Fabrizio Scala
Summary: The production of synthetic methane using CO2 from flue gases and green hydrogen offers a promising method to combine renewable energy, chemical storage, and CO2 utilization. A novel reactor configuration has been proposed to ensure high methane yields, temperature control, and low operating pressure. The integration of different sections of the system offers several advantages. The performance of the system was evaluated in terms of costs and environmental impact, showing higher production costs compared to natural gas but lower than biomethane.
Article
Thermodynamics
Chootrakul Siripaiboon, Prysathyrd Sarabhorn, Chinnathan Areeprasert, Fabrizio Scala
Summary: This study compared a novel top-lit downdraft gasifier stove (TLDDGS) with a traditional top-lit updraft gasifier stove (TLUDGS) in terms of modeling and performance. The TLDDGS exhibited a downward-flow configuration and showed superior flame stability. The experimental results demonstrated that TLDDGS had an average fuel consumption of 4.57 +/- 0.933 g/min, an average flame temperature of 608 +/- 43 degrees C, and met the local standard for emissions.
Article
Energy & Fuels
Antonio Coppola, Fiorella Massa, Fabrizio Scala
Summary: In the context of carbon capture and utilization technologies and bio-energy transition, catalytic methanation is considered as an interesting pathway for producing synthetic methane for energy storage. Synthetic methane has significant advantages such as existing infrastructure, social acceptance, and widespread usage. The production of synthetic methane is being investigated by the scientific community.
Article
Energy & Fuels
Laura Molignano, Maurizio Troiano, Roberto Solimene, Sina Tebianian, Fabrizio Scala, Piero Salatino, Jean-Francois Joly
Summary: The hydrodynamics of bubbling fluidized beds of Geldart B granular solids operated at ambient temperature and at 500 degrees C are investigated. The statistical analysis shows multimodal patterns in the Probability Density Functions (PDF) of local bed voidage, with a bimodal character apparent in the emulsion phase at higher gas superficial velocities. Two phases with different porosity, LV-phase and HV-phase, are inferred to co-exist in the emulsion phase. The influence of bed hydrodynamics and expansion patterns on gas mass transfer around freely moving particles is also studied.
Article
Energy & Fuels
Antonio Coppola, Fiorella Massa, Fabio Montagnaro, Fabrizio Scala
Summary: Sorption-Enhanced Gasification (SEG) is a promising technology that selectively removes CO2 from the gasification environment using Ca-based sorbents. This study investigates the performance and attrition/fragmentation tendency of six different commercial limestones under simulated SEG conditions. The experimental campaign was carried out in a lab-scale Dual Interconnected Fluidised Bed (DIFB) reactor, and the results were analyzed based on operating conditions and characterization tests.
Review
Energy & Fuels
Mattia Boscherini, Alba Storione, Matteo Minelli, Francesco Miccio, Ferruccio Doghieri
Summary: The article gives an overview of catalyst-based processes for methane-based hydrogen production, including both fossil and sustainable sources. The three main paths of steam- and dry-reforming, partial oxidation, and thermo-catalytic decomposition are briefly introduced and compared. The article also discusses novel strategies like chemical looping, membrane separation, electrical-assisted processes, multistage reactors, and catalyst patterning as the most promising perspectives for CH4 reforming, especially on a smaller scale.
Article
Energy & Fuels
Prysathryd Sarabhorn, Panawit Sitthichirachat, Chootrakul Siripaiboon, Chanoknunt Khaobang, Prachya Palay, Tanaporn Thapsamut, Haryo Wibowo, Chinnathan Areeprasert, Fabrizio Scala
Summary: This study comprehensively evaluated the gasification of wood pellets in a pilot-scale decoupling gasifier. The results showed that the decoupling gasifier had lower temperatures in all zones compared to the conventional updraft gasifier. The tar yield from the decoupling gasifier was significantly lower, but the lower heating value (LHV) of syngas was also lower than that from updraft gasification. Kinetics and thermodynamics analysis suggested that the energy requirement for wood pellet decomposition was slightly higher in the decoupling gasifier due to its higher activation energy, and the presence of CO2 in the flue gas atmosphere caused more heavy volatiles and char.
Article
Mechanics
A. Amoresano, G. Langella, P. Iodice, G. Quaremba
Summary: Optimizing heat transfer in the evaporator tubes is crucial for obtaining optimal coefficients. Researchers use non-intrusive techniques to detect the type of bubble motion in the ducts, and found a good relationship between the motion of the bubbles and their behavior characteristics through data recorded by accelerometers and a fast video camera.