Article
Thermodynamics
Mahmoud Amer, Paola Brachi, Giovanna Ruoppolo, Ibrahim El-Sharkawy, Mahmoud Ahmed, Shinichi Ookawara, Ahmed Elwardany
Summary: This study investigated the energy valorization of globe artichoke (GA) leaves through extensive lab-scale experimental torrefaction, carbonization, and coking processes. The samples exhibited three-stage thermal decomposition behavior, with fluctuating activation energy ranges in different temperature ranges. Irregular trends were observed when carbonization exceeded 500 degrees C.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Ma Lourdes Martinez-Cartas, Sebastian Sanchez, Manuel Cuevas
Summary: This paper investigates the compositions, energetic properties, combustion behaviors, and pyrolysis kinetics of six tropical hardwood species to understand their differences in combustion and biochar production capabilities. Significant variation was observed among the species, with Aucoumea klaineana performing the best in combustion and Testulea gabonensis and Pterocarpus soyauxii showing the highest capacity for biochar production through pyrolysis.
Article
Green & Sustainable Science & Technology
Hao Liu, Mi Li, Shuna Zhao, Rhoda Afriyie Mensah, Oisik Das, Lin Jiang, Qiang Xu
Summary: Considering the extensive use of wood materials, converting waste wood into new energy sources is a potential solution. This study investigated the thermal stability and combustion models of cypress, pine, and fir woods commonly used in China, as well as old samples of each species. The pyrolysis process was analyzed using different heating rates and kinetic parameters were calculated. The results contribute to understanding the fire mechanism of waste woods and providing guidance for its efficient utilization as a new energy fuel.
Article
Green & Sustainable Science & Technology
Rumaisa Tariq, Yasmin Mohd Zaifullizan, Arshad Adam Salema, Atiqah Abdulatif, Loke Shun Ken
Summary: Co-pyrolysis and co-combustion of orange peel, oil palm shell, and empty fruit bunch biomass were studied using a thermogravimetric analyzer. Blending different biomasses altered the thermogravimetry and derivative thermogravimetry profiles, indicating multiple reactions. Biomass blends showed a strong synergetic effect during char formation.
Article
Energy & Fuels
Hongdi Yu, Jiantao Li, Fawei Lin, Menglan Zeng, Rundong Li, Beibei Yan, Guanyi Chen
Summary: Pyrolysis of oily sludge is commonly used for its efficient removal and recovery of petroleum hydrocarbons. However, little research focuses on evaluating the solid products from this process. This study found that the fly ash and pyrolysis residue still contain trace amounts of petroleum hydrocarbons, and the combustion of the solid samples was more effective than pyrolysis. These findings suggest that the solid products have potential for combustion utilization.
Article
Chemistry, Multidisciplinary
Xianglong Meng, Zhilei Qi, Cong Yu, Junjie Bian, Zhongliang Ma, Qiulian Long, Jianzheng Su
Summary: Sulfonic acid grafted catalysts significantly enhance the oil yield and quality in the aqueous conversion of oil shale, showing great potential for practical applications.
Article
Thermodynamics
Brian Y. Lattimer, Elias Bearinger, Steven Wong, Jonathan L. Hodges
Summary: This research investigates the parameters affecting firebrand burning conditions, develops an analytical model to predict firebrand burning, and compares different methods for predicting char oxidation. The model with char oxidation determined using the heat and mass transfer Reynolds analogy provided the most accurate predictions, especially in forced flow conditions.
COMBUSTION AND FLAME
(2022)
Article
Thermodynamics
Jonathan Honorien, Baptiste Sirjean, Pierre-Alexandre Glaude, Rene Fournet
Summary: A detailed mechanism for the combustion of methyl isocyanate is proposed for the first time. The mechanism contains 130 reactions and was merged with the reaction base proposed by Glarborg et al. Experimental data related to the pyrolysis of methyl isocyanate were simulated in a closed reactor and a good agreement was observed. Additionally, the auto-ignition temperature (Ti gn) of methyl isocyanate was calculated based on the standard ASTME659-78 test and was close to the experimental value. Flow rate and sensitivity analysis were performed to highlight the main reaction pathways.
COMBUSTION AND FLAME
(2023)
Article
Thermodynamics
S. P. Sathiya Prabhakaran, Ganapathiraman Swaminathan, Viraj V. Joshi
Summary: Lignite (AL), a low-rank coal with a calorific value of 5.9 MJ/kg, was extensively studied for its combustion and pyrolysis characteristics using thermogravimetric analysis under non-isothermal conditions. The kinetic investigation involved various methods to determine activation energy, reaction mechanisms, and combustion indices, providing scientific findings and guidance for spontaneous combustion and pyrolysis prediction of AL on site. The research results were further validated using artificial neural networks, confirming the analytical thermal degradation behavior of AL.
Article
Energy & Fuels
Vianney Andrew Yiga, Andrew Nuwamanya, Agatha Birungi, Michael Lubwama, Harriet Nalubega Lubwama
Summary: Despite the benefits of briquettes in offsetting the negative impacts of firewood/charcoal, their uptake remains low due to a lack of literature on key parameters. This study analyzed the emissions, combustion, kinetics, and thermodynamic characteristics of carbonized briquettes made from rice husks. Results showed high activation energy, drop strength, and particle density, as well as low energy barrier and endothermic nature of the degradation process. The developed briquettes also exhibited high energetic densities and fuel value indices, attributed to their high heating value.
Article
Thermodynamics
Huanhuan Wang, Bingzhi Liu, Cheng Xie, Yanbo Li, Jintao Cui, Lili Xing, Zhandong Wang
Summary: This study investigates the thermal decomposition reaction pathways of isopentanol through theoretical calculations, showing that water elimination and C-C bond dissociation play significant roles in its unimolecular decomposition.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Arshad Adam Salema, Yasmin Mohd Zaifullizan, Wai Hong Wong
Summary: This study investigates the decomposition and residue formation of face masks through pyrolysis and combustion processes. The findings indicate that combustion is a more suitable method for disposing of face masks, as it has lower activation energy and decomposition temperature, as well as lower emissions.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Energy & Fuels
Renjie Chen, Qian Sheng, Xiaohu Dai, Bin Dong
Summary: The low-temperature pyrolysis process can effectively convert sewage sludge into biochar with improved fuel properties and stable combustion behaviors.
Article
Biotechnology & Applied Microbiology
Prashant Ram Jadhao, Arun K. Vuppaladadiyam, Aditya Prakash, Kamal K. Pant
Summary: This study investigated the non-isothermal co-pyrolysis of Sargassum wightii and electronic waste and found that they had a synergistic influence on each other. The obtained thermodynamic and kinetic parameters demonstrated the potential of using this co-pyrolysis process to harness bioenergy and optimize the co-pyrolysis of macroalgae with other feedstocks.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Green & Sustainable Science & Technology
Yaojun Yang, Rui Diao, Zejun Luo, Xifeng Zhu
Summary: In this study, a co-combustion strategy for biomass pyrolysis semi-coke (PC) and agricultural waste rapeseed cake (RC) was proposed, and the interaction, kinetics, prediction, and emission responses were investigated. The results showed that the ratio of P/R (mixed) in 1:1 enhanced the reaction rate, while a lower P/R ratio advanced the peak temperature and facilitated co-combustion synergies in the temperature range of 730-790 K. The kinetic distribution was successfully predicted using multiple distributed activation energy model (MDAEM) coupled with artificial neural network (ANN). Co-combustion resulted in centralized activation energy distribution, lowered reaction energy barriers, and augmented instantaneous energy release. The temperature dependency responses of flue gas varied significantly with mixed ratios and temperatures.
Article
Multidisciplinary Sciences
Juan A. Conesa, Nuria Ortuno, Damia Palmer
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Physical
Eliana Quiroga, Julia Molto, Juan A. Conesa, Manuel F. Valero, Martha Cobo
Article
Green & Sustainable Science & Technology
Milene F. Diaz-Basantes, Juan A. Conesa, Andres Fullana
Article
Environmental Sciences
J. Motto, B. Lopez-Sanchez, D. Domene-Lopez, A. Moreno, R. Font, M. G. Montalban
Article
Polymer Science
Gerard Gandon-Ros, Samuel S. Nunez, Nuria Ortuno, Ignacio Aracil, Maria Francisca Gomez-Rico, Juan A. Conesa
Summary: Research has shown that using sewage sludge as an alternative to chemical inhibitors can effectively reduce the emission of harmful substances during the incineration of polyvinyl chloride waste, with significant results achieved by adding sludge in an oxygen-rich environment to reduce PCDD/F and dl-PCB emissions.
Review
Energy & Fuels
Juan A. Conesa, Samuel S. Nunez, Nuria Ortuno, Julia Molto
Summary: The presence of pollutants in recycled plastics poses a significant challenge to the effective recycling process, yet a circular economy of plastics can lead to great savings of energy, water, and CO2 emissions.
Article
Engineering, Multidisciplinary
R. Font
Summary: The study on self-heating of biomass through chemical oxidation and water vapor sorption found that grass has a high water vapor sorption capacity, which may accelerate spontaneous ignition at high temperatures. Simulation programs were used to study oxidation processes and ignition times, providing insights for warehouses storing similar biomass and forestry management groups dealing with wildfires.
Review
Green & Sustainable Science & Technology
Juan A. Conesa
Summary: The addition of nitrogen and sulfur compounds can effectively suppress the emission of dioxins and furans in MSWI plants, showing very promising results with minimal capital investment. By utilizing waste rich in nitrogen and/or sulfur as inhibitor compounds, pollutants can be reduced during waste treatment. In laboratory tests, the efficiency of using sewage sludge as an inhibitor was over 99%, while in actual MSWI plants, the efficiency can reach as high as 90%.
Review
Energy & Fuels
Juan A. Conesa, Nuria Ortuno
Summary: Water treatment usually does not specifically address the removal of microplastics, but treatment plants can effectively process water and reduce the number of synthetic microparticles in effluents. However, the discharge volumes from water treatment plants are often high, resulting in the daily release of a significant amount of microplastics and microfibers. Microplastics also accumulate in sludge and can disperse when used to amend soil. One of the most commonly used treatment processes, rapid sand filtration, can break microplastics into smaller pieces and increase the plastic particle count in sludge. Thermal processes, such as incineration, conducted using the best available techniques, can ensure the safe disposal of highly microplastic-contaminated sludge.
Article
Environmental Sciences
Raiza Paul, Alejandro Romero, Julia Molto, Nuria Ortuno, Jon Aizpurua, Maria Jose Gomez-Torres
Summary: This study examines the relationship between paternal exposure to dioxin-like polychlorinated biphenyls (DL-PCBs) and in vitro fertilization (IVF) outcomes. The findings suggest that serum DL-PCB concentrations are associated with embryo quality, implantation rates, clinical pregnancy likelihood, and live birth rates.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Gerard Gandon-Ros, Ignacio Aracil, Maria Francisca Gomez-Rico, Juan A. Conesa
Summary: This study successfully conducted debromination of waste printed circuit boards (WCBs) using a hydrothermal process and proposed a simple technique to obtain reusable glass fibers, which can have a positive impact on the related industries and conserve water and energy.
Article
Environmental Sciences
Gerard Gandon-Ros, Ignacio Aracil, Maria Francisca Gomez-Rico, Juan A. Conesa
Summary: Effective management of waste printed circuit board (WCB) recycling brings significant advantages in terms of economy, society, and environment. Utilizing non-metallic parts of WCBs, which are known for their toxicological risks, can mitigate adverse socio-environmental impacts. Mechanochemical treatment and additives can achieve debromination of WCBs containing brominated flame retardant.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Polymer Science
Juan A. Conesa, Gerard Gandon-Ros, Maria F. Gomez-Rico, Ignacio Aracil
Summary: The debromination of waste circuit boards (WCBs) used in computer motherboards and components has been studied using two different equipment. One method involves using small non-stirred batch reactors with K2CO3 solutions, while the other method involves using a planetary ball mill with solid reactants. The kinetics of the reactions have been analyzed, with the conclusion that the chemical reaction step is slower than the mass transfer step. The activity of the reactants has also been explored, showing that slightly calcinating calcite can increase the activity of marble sludge.
Article
Energy & Fuels
R. Font
Article
Chemistry, Analytical
Guanshuai Zhang, Shanjian Liu, Dongmei Bi, Zhisen He, Jia Liu, Yinjiao Liu
Summary: Hydrogen peroxide pretreatment was applied for fast pyrolysis of corn stalks, and it was found that the pretreatment effectively promoted lignin depolymerization and decreased the reaction activation energy. The pretreatment also increased the cellulose content and removed alkali and alkaline earth metals from the biomass. The pH of the hydrogen peroxide solution affected the removal of lignin and ash by the pretreatment, and the composition of bio-oil changed significantly, with a significant increase in the relative content of levoglucosan after pretreatment.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2024)