Article
Thermodynamics
Kailasnath B. Sutar, Sangeeta Kohli, M. R. Ravi
Summary: Two downdraft gasifier cookstoves have been developed for domestic application, and their thermal performance and emissions were studied by varying the output parameters of the gasifier.
Article
Green & Sustainable Science & Technology
A. Ibrahim, S. Veremieiev, P. H. Gaskell
Summary: A stoichiometric model is developed to predict the syngas yield from a biomass gasifier, considering the thermodynamic equilibrium of gasification reactions and the formation of minor contaminants. The model shows good agreement with experimental data.
Article
Agricultural Engineering
Zeba Naaz, M. R. Ravi, Sangeeta Kohli
Summary: Modelling of a downdraft biomass gasifier involves complex phenomena such as different time scales, inconsistencies in kinetic data, uncertainties in specific surface area, etc. Challenges in transient modelling, including the lack of discussion on ignition methods and radiation modelling, have not been fully addressed.
BIOMASS & BIOENERGY
(2022)
Article
Thermodynamics
Muhammad Awais, Muhammad Mubashar Omar, Anjum Munir, Wei li, Muhammad Ajmal, Sajjad Hussain, Syed Amjad Ahmad, Amjad Ali
Summary: This study evaluated the effects of biomass ratios on gasification efficiency, reactor thermal profile, and specific yield of syngas composition and tar contents. The results suggested that the mixture of sugarcane bagasse + coconut shells was a suitable feedstock mixture for gasification.
Article
Thermodynamics
A. Fazil, Sandeep Kumar, Sanjay M. Mahajani
Summary: Gasification is a technically feasible method for municipal solid waste valorization, which can meet emission limits and reduce landfill burden. This study investigates the potential of using paper-rich commercial refused-derived fuel (RDF) with high ash content for gasification and co-gasification. The results suggest that co-gasification can reduce overall ash content and increase the heating value of the gas produced.
Article
Engineering, Environmental
Rafael D. Gomez, Mario Palacio, Juan F. Arango, Adrian E. Avila, Jorge M. Mendoza
Summary: An experimental characterization of crop residue biomass blends was conducted to evaluate their energy potential, showing that an increase in rice husk proportion negatively affected temperature, syngas composition, syngas lower heating value, and cold gas efficiency.
Article
Energy & Fuels
Seyed Hashem Samadi, Barat Ghobadian, Mohsen Nosrati, Mahdi Rezaei
Summary: In this study, a predictive model for fixed bed gasification properties was developed using MLP neural network. By considering the physicochemical composition of the biomass and the reactor operating conditions, the MLP model achieved reasonable accuracy in predicting the gas composition and lower heating value. The results of this study demonstrated that MLP can effectively replace costly experimental investigations to study the gasification process.
Article
Thermodynamics
Shahin Mazhkoo, Hossein Dadfar, MohammadSina HajiHashemi, Omid Pourali
Summary: The study investigated a small-scale downdraft gasification system integrated with an internal combustion engine for the sustainable conversion of biomass into electricity. Different measurements and analyses were performed to monitor and evaluate the quality of feedstock and products. The results showed that with increasing electrical loads, the lower heating value of syngas decreased, while cold gas efficiency and carbon conversion efficiency increased. The study also proposed a modified quasi-thermoequilibrium model to predict syngas composition, tar yields, and char released during the gasification process.
ENERGY CONVERSION AND MANAGEMENT
(2021)
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
Thermodynamics
Bhoopendra Pandey, Pratik N. Sheth, Yogesh K. Prajapati
Summary: Using CO2 as a gasifying agent in biomass gasification can increase the CO content and heating value of the producer gas, but it reduces the average temperature in the gasifier.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Carlos A. Diaz Gonzalez, Diego C. de Oliveira, Diego M. Yepes, Leonardo E. Pacheco, Electo E. Silva
Summary: The development and improvement of biomass gasification processes have been accelerated by the use of computational tools for process simulation. This study presents an Aspen Plus model of a small-scale downdraft gasifier and successfully adjusts the model to accurately simulate the gasification of different biomasses.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
A. Zachl, M. Buchmayr, J. Gruber, A. Anca-Couce, R. Scharler, C. Hochenauer
Summary: The study found that small-scale biomass gasifiers produce consistently high-quality product gas during load changes, but can only tolerate sudden changes within a range of +/- 20% of the nominal load. Flexibility of the gasifier is affected by changes in fuel water content, requiring methods like exhaust gas recirculation and water injection for switching between wet and dry fuels.
Article
Engineering, Chemical
Reza Jahromi, Mahdi Rezaei, Seyed Hashem Samadi, Hossein Jahromi
Summary: A CFD model was developed for biomass gasification in a downdraft fixed-bed gasifier, with sugarcane bagasse used as feedstock. The study identified optimal operating conditions, such as S/A ratio of 0.67 and inlet velocity of 20 m/s, to maximize syngas yield and conversion efficiency, while increasing preheating temperature of air/steam and decreasing biomass moisture content had positive impacts on the gasification process. Maximum conversion efficiency reached 69.14% under the optimum conditions.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Thermodynamics
J. Barco-Burgos, J. Carles-Bruno, U. Eicker, A. L. Saldana-Robles, V. Alcantar-Camarena
Summary: This study investigates the steam gasification of palm kernel shells for hydrogen-rich N2-free syngas production in a pilot-scale atmospheric downdraft allothermal gasifier. Results show that maximum H2 generation and cold gas efficiency can be achieved under specific conditions.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Muhammad Awais, Wei Li, Anjum Munir, Muhammad Mubashar Omar, Muhammad Ajmal
Summary: The research indicates that the type of biomass feedstock and equivalence ratio significantly affect the performance parameters of the gasifier, leading to variations in the produced syngas and tar content from sugarcane bagasse and coconut shells.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Chemistry, Physical
Chakrit Soongprasit, Duangdao Aht-Ong, Viboon Sricharoenchaikul, Supawan Vichaphund, Duangduen Atong
Article
Energy & Fuels
Kanit Soongprasit, Viboon Sricharoenchaikul, Duangduen Atong
Summary: Organosolv lignin extracted from sugarcane bagasse and commercial grade lignin were used as starting materials in this study. The addition of ZSM-5 catalysts enhanced the transformation of aromatic furan and monolignol to hydrocarbon species, with maximum aromatic production found at specific B:C ratios. ZSM-5 also showed instinctive performance on MAHs and PAHs production, although polymerization between MAHs resulting in PAHs was observed.
Article
Energy & Fuels
Supawan Vichaphund, Panida Wimuktiwan, Chakrit Soongprasit, Viboon Sricharoenchaikul, Duangduen Atong
Summary: In this study, lignin and fly ash were used to produce catalysts for upgrading pyrolysis products, resulting in significantly increased yields of aliphatic and aromatic hydrocarbons under appropriate catalyst ratios and temperatures.
Article
Energy & Fuels
Umponruch Phusuwan, Duangduen Atong, Jurarat Nisamaneenate, Viboon Sricharoenchaikul
Summary: The study evaluated the optimal conditions for catalytic steam reforming of waste motor oil (WMO) in a fixed-bed laboratory reactor to produce quality syngas. Results showed that a residence time of 10 seconds and a steam to carbon ratio of 1:1 at 800 degrees Celsius were the most effective conditions for achieving high carbon and hydrogen conversions. Additionally, the presence of iron loading on olivine catalyst led to improved conversion rates compared to non-catalytic cases.
Article
Energy & Fuels
Punchaluck Sirinwaranon, Viboon Sricharoenchaikul, Duangduen Atong
Summary: This study examined the catalytic gasification of torrefied cassava rhizome (TCR) with metals (Co, Fe) on MCM-41. The catalysts were synthesized using illite clay waste as silica and aluminum sources under hydrothermal pressure, resulting in well-ordered MCM-41 with high surface area. The addition of Co and Fe catalysts significantly improved the efficiency of the gasification process for TCR.
Article
Chemistry, Analytical
Prangtip Rittichote Kaewpengkrow, Duangduen Atong, Viboon Sricharoenchaikul
Summary: The effects of temperature and catalytic activity on the decomposition of Jatropha waste to bio-oil were investigated. The use of catalysts, specifically Ni/Ac and Pd/Ac, significantly increased the aromatic and total hydrocarbon fractions in the product. The optimized bio-oil can be used as biofuel, while the biochar co-produced during the process can be used as solid fuel.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Physical
Montree Hankoy, Chaiwat Phrompet, Prangtip Rittichote Kaewpengkrow, Supawan Vichaphund, Duangduen Atong, Mettaya Kitiwan, Phacharaphon Tunthawiroon
Summary: Graphene oxide (GO) membranes were investigated for hydrogen (H2) purification applications. The alumina/graphene oxide (AGO) composites with varying contents of GO were fabricated and characterized. The AGO membranes exhibited enhanced hydrogen permeance and selectivity compared to pristine Al2O3 membrane, and the gas permeation mechanism followed Knudsen diffusion.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Mettaya Kitiwan, Mongkol Kongsak, Duangduen Atong, Yoshito Wakui
MATERIALS TODAY-PROCEEDINGS
(2020)
Article
Energy & Fuels
Kanit Soongprasit, Viboon Sricharoenchaikul, Duangduen Atong
Article
Energy & Fuels
Jurarat Nisamaneenate, Duangduen Atong, Anun Seemen, Viboon Sricharoenchaikul
Article
Energy & Fuels
Punchaluck Sirinwaranon, Duangduen Atong, Viboon Sricharoenchaikul
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.