Article
Chemistry, Physical
Shubhadeep Nag, Prabal K. Maiti, Subramanian Yashonath
Summary: The novel method proposed in this study utilizes modified intermolecular interaction potentials and hot zones in specific zeolite materials to achieve efficient separation of hydrocarbon mixtures with high separation factors. The method requires minimal energy and is suitable for green chemistry applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Jovan D. Jovanovic, Nikola D. Grozdanic, Ivona R. Radovic, Mirjana Lj. Kijevc
Summary: A group contribution model based on Free-Volume Theory for predicting the viscosity values of n-alkanes and iso-alkanes in the liquid phase was developed in this paper. A database containing 2129 experimental data with a temperature range up to 573.15 K and a pressure range up to 4000 bar was used to develop the model. The total weighted average percentage error is 4.894%. The model was further tested on 472 experimental data with a temperature range up to 564.15 K and a pressure range up to 2019 bar, and a mean percentage error of 5.155% was obtained. (c) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Analytical
Weiyi Wen, Ping Xu, Haiping Xiang, Mengyi Wen, Xuemin Ye, Chu Chu, Shengqiang Tong
Summary: In this study, a comprehensive two-dimensional countercurrent chromatography (CCC) combined with gas chromatography (GC) was used to characterize the chemical constituents of Artemisia argyi essential oil and evaluate the orthogonality of the 2D chromatographic system. A solvent system composed of n-hexane/acetonitrile/methanol (2:2:1, v/v/v) was selected for the first dimensional separation and all CCC fractions were analyzed by GC. A 2D contour plot was created to visualize the chemical compositions. A total of 1392 peaks were obtained through the comprehensive 2D CCC x GC separation and high spatial coverage and low linear correlation coefficient were achieved. Moreover, all compounds were identified by GC-MS. The obtained 2D contour plot could be divided into six zones representing different component groups, which could be used to identify and predict the structure of unknown compounds in Artemisia argyi essential oil for comprehensive characterization.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Ivana Milenkovic, Ksenija Radotic, Jelena Trifkovic, Ljubodrag Vujisic, Vladimir P. Beskoski
Summary: The literature on semi-volatile organic compounds in plants and the impact of cerium oxide nanoparticles on them is limited. This study investigated the effects of uncoated and variously coated cerium oxide nanoparticles on wheat and pea plants, identifying differences in compound levels and responses. The results suggest that wheat contains a greater number of compounds compared to peas, but is less affected by the coated nanoparticle treatments.
JOURNAL OF SEPARATION SCIENCE
(2021)
Article
Multidisciplinary Sciences
Guillaume Leseigneur, Jean-Jacques Filippi, Nicolas Baldovini, Uwe Meierhenrich
Summary: Gas chromatography was used to separate acyclic saturated hydrocarbon enantiomers, and the absolute stereochemical configuration was determined through the synthesis of single enantiomers. The study highlights the significance of chiral hydrocarbons and their potential use as biosignatures in geological and astrobiology studies. Additionally, the findings have implications for the search for life on Mars by the ESA's ExoMars rover in 2023.
Article
Food Science & Technology
Thomas J. McGrath, Giulia Poma, Jasper Bombeke, Franck Limonier, Els Van Hoeck, Laure Joly, Adrian Covaci
Summary: This work optimized an analytical method for quantifying short- and medium-chained chlorinated paraffins in various food matrices, and validated the method's applicability through repeated analysis of samples fortified with SCCPs and MCCPs. The method showed good accuracy, high precision, and suitability for different food matrices.
Review
Chemistry, Analytical
Thomas Themelis, Ali Amini, Jelle De Vos, Sebastiaan Eeltink
Summary: In spatial comprehensive three-dimensional chromatography (3D-LC), unprecedented resolving power is achieved within a three-dimensional separation space, with the maximum peak capacity being the product of peak capacities achieved in individual dimensions. The parallel development of second- and third-dimension separation stages overcomes the limitations of conventional multi-dimensional approaches.
ANALYTICA CHIMICA ACTA
(2021)
Review
Chemistry, Analytical
Nino B. L. Milani, Eric van Gilst, Bob W. J. Pirok, Peter J. Schoenmakers
Summary: Although comprehensive 2-D GC is a well-established and widely used analytical method, it is still a highly dynamic field due to numerous innovations. This review discusses recent developments in comprehensive 2-D GC technology, including exciting improvements in modulation methods, detection methods, retention modeling, and data analysis.
JOURNAL OF SEPARATION SCIENCE
(2023)
Article
Biochemical Research Methods
Daniel Gutierrez-Martin, Esteban Restrepo-Montes, Oksana Golovko, Rebeca Lopez-Serna, Reza Aalizadeh, Nikolaos S. Thomaidis, Montse Marques, Pablo Gago-Ferrero, Ruben Gil-Solsona
Summary: This study validated a methodology using high-resolution mass spectrometry for accurate profiling of exogenous chemicals and related metabolites in urine samples. They evaluated different extraction protocols and identified the most effective one. Through wide-scope target analysis, they successfully identified and semi-quantified 36 chemicals. Additionally, their results dismissed the need for a typical labor-intensive and time-consuming step.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Timothy J. Trinklein, Cable G. Warren, Robert E. Synovec
Summary: The study investigates the signal enhancement and signal-to-noise ratio enhancement provided by comprehensive three-dimensional gas chromatography compared to one-dimensional gas chromatography. A model is proposed and validated through experimental comparison, demonstrating that GC(3) can offer enhanced detectability.
ANALYTICAL CHEMISTRY
(2021)
Article
Physiology
Madeleine M. Ostwald, Sandra Tretter, Jan Buellesbach, Juliana M. Calixto, Jennifer H. Fewell, Juergen Gadau, Kaitlin M. Baudier
Summary: This study investigates the mechanisms by which harvester ants cope with desiccating environmental conditions. The results show that larger-bodied ants have a higher desiccation resistance, and the abundance of cuticular hydrocarbon profiles is positively related to desiccation resistance. These findings contribute to understanding the physiological mechanisms of desiccation resistance in insects.
JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMS AND ENVIRONMENTAL PHYSIOLOGY
(2023)
Article
Chemistry, Analytical
Raphael Pepino, Vanessa Leyva, Adrien D. Garcia, Jana Bockova, Cornelia Meinert
Summary: This work proposes a comprehensive two-dimensional gas chromatography method for the resolution and quantification of 27 amino acids. The method combines derivatization and enantioselective gas chromatography to accurately determine enantiomeric excess.
JOURNAL OF SEPARATION SCIENCE
(2022)
Article
Chemistry, Analytical
Takuya Fujiwara, Takashi Funatsu, Makoto Tsunoda
Summary: A rapid quantitative analytical method using pillar array columns was developed for the analysis of branched-chain alpha-keto acids (BCKAs). The method showed rapid, sensitive, and precise analysis of BCKAs, suitable for clinical diagnosis.
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2021)
Review
Chemistry, Analytical
John Mommers, Sjoerd van der Wal
Summary: Developing methods for comprehensive two-dimensional gas chromatography (GC x GC) is more complex compared to one-dimensional gas chromatography due to the need to make more method development choices and the complex interplay of primary and secondary parameters. The larger internal diameter of the primary column than the secondary column complicates optimization and leads to sub-optimal flow settings.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2021)
Article
Biochemical Research Methods
Andrea Hochegger, Sebastiano Panto, Nick Jones, Erich Leitner
Summary: In September 2022, the European Commission released a new regulation allowing the use of novel technologies to generate data for establishing regulatory processes on recycled plastic materials for food contact. This study compared different analytical approaches for screening commercially purchased post-consumer recycled polypropylene buckets. The results highlight the importance of detailed characterization and the advantages and disadvantages of using conventional gas chromatography and comprehensive two-dimensional gas chromatography with mass spectrometry.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Ednardo Moreira Santos, Debora de Almeida Azevedo
Summary: The study evaluated the impact of light-duty vehicles emissions on tropospheric ozone formation in the Rio de Janeiro Metropolitan Area, highlighting the significance of propane as the main contributor to ozone formation due to the prevalence of flex-fuel cars in the area.
AIR QUALITY ATMOSPHERE AND HEALTH
(2021)
Article
Energy & Fuels
Nathalia S. Pontes, Raquel V. S. Silva, Vitor L. Ximenes, Andrea R. Pinho, Debora A. Azevedo
Summary: The study focused on the pentane solvent deasphalting (SDA) process using a blend of petroleum vacuum residue (VR) and bio-oil (BO) or solely bio-oil as raw material to produce deasphalted oil (DAO) and asphaltic residue (AR). Chemical speciation of the fractions was analyzed using GC x GC-TOFMS and ESI (+/-)-Orbitrap HRMS techniques. The results showed successful insertion of renewable molecules into the SDA fractions for potential application in refining processes like catalytic cracking. Additionally, satisfactory outcomes were achieved in bench-scale catalytic cracking and promising results were obtained in asphalt aging tests with the AR fraction used as an asphalt cement additive.
Article
Geochemistry & Geophysics
Thamara A. Barra, Clarisse L. Torres, Marco Aurelio Dal Sasso, Vinicius B. Pereira, Eugenio Santos Neto, Debora A. Azevedo
Summary: The Campos, Santos and Espirito Santo Basins in Brazil contain significant pre-salt reserves. By analyzing oils from these basins using advanced techniques, researchers concluded that the oils mainly originated from lacustrine environments, providing valuable insights into the prolific petroleum systems of SEOBB.
ORGANIC GEOCHEMISTRY
(2021)
Article
Energy & Fuels
Daniela Franca, Dayane M. Coutinho, Thamara A. Barra, Rafael S. Xavier, Debora A. Azevedo
Summary: This study aimed to characterize the substances present in Brazilian pre-salt oils using high-resolution analytical techniques, showing that these oils are mainly composed of alkanes, naphthenes, and naphthenes. Phenolic compounds were also detected in the oils.
Article
Geochemistry & Geophysics
Alexander A. Lopes, Vinicius B. Pereira, Leonardo Amora-Nogueira, Humberto Marotta, Luciane S. Moreira, Renato C. Cordeiro, Gabriela Vanini, Debora A. Azevedo
Summary: Different types of water in the Amazon rivers and flooded areas have a significant influence on the composition of sedimentary organic matter (SOM). Through geochemical assessment of floodplain lakes, it was found that black and clear water lakes are mainly influenced by terrigenous organic matter, while white water lakes are dominated by aquatic organisms. Water types also affect the production and degradation processes of organic matter.
ORGANIC GEOCHEMISTRY
(2021)
Article
Chemistry, Physical
Eduardo Falabella Sousa-Aguiar, Carolina Zanon Costa, Maria Antonieta Peixoto Gimenes Couto, Debora de Almeida Azevedo, Jose Faustino Souza de Carvalho Filho
Summary: This study demonstrates the thermal deoxygenation of palm residue under sub- and supercritical water conditions using Raney nickel catalyst, which showed high selectivity for bio-kerosene and diesel without the need for external hydrogen supply. The best results were achieved at 390 degrees C, 10wt.% catalyst load, and 3.5 hours of reaction time. The Raney nickel catalyst promoted decarboxylation and/or decarbonylation reactions over hydrodeoxygenation reaction.
Article
Energy & Fuels
Dayane M. Coutinho, Daniela Franca, Gabriela Vanini, Alexandre O. Gomes, Debora A. Azevedo
Summary: This article discusses the complexity of petroleum and the use of comprehensive assessment methods for crude oil distillation cuts. By utilizing advanced analytical techniques, the chemical compositions of different petroleum samples were analyzed in detail, providing valuable information for prediction and prevention in the oil industry.
Article
Chemistry, Applied
Gleicielle Tozzi Wurzler, Victor Teixeira da Silva, Debora de Almeida Azevedo, Ayla Sant' Ana da Silva, Fabio Bellot Noronha
Summary: This study investigated the fractionation of sugarcane bagasse using Organosolv treatment and different catalysts. The results showed that the catalysts had different effects on the delignification and product distribution. Mo2C/AC and Mo2C/Al2O3 catalysts showed higher bio-oil yield and a solid residue that was more easily hydrolyzed by cellulases.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Gleicielle Tozzi Wurzler, Thamara Andrade Barra, Vinicius Barreto Pereira, Rodolpho Caeiro dos Santos, Alexandre de Oliveira Gomes, Gabriela Vanini, Debora de Almeida Azevedo
Summary: This study characterized naphthenic acids in Brazilian crude oils using high-resolution mass spectrometry and comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry. The results showed variations in the types and concentrations of naphthenic acids in different crude oil samples, indicating that TAN values cannot accurately represent the actual quantification of acids.
Article
Geochemistry & Geophysics
Vinicius B. Pereira, Alexander A. Lopes, Marco Aurelio Dal Sasso, Leonardo Amora-Nogueira, Thairiny Fonseca, Humberto Marotta, Renato C. Cordeiro, Debora A. Azevedo
Summary: This study investigates the sediment composition and methanogenesis in a clearwater floodplain lake in the Brazilian Amazon. The findings suggest that the biomass stocks in these lakes may be sensitive to global warming due to the predominance of terrestrial organic matter and intense microbial contribution.
APPLIED GEOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Leandro Alves de Souza, Priscilla Magalhaes de Souza, Gleicielle Tozzi Wurzler, Victor Teixeira da Silva, Debora A. Azevedo, Robert Wojcieszak, Fabio Bellot Noronha
Summary: This study investigated the depolymerization reactions of cellulose and hemicellulose during the fractionation of lignocellulosic biomass using an isopropyl alcohol/water mixture and the Raney-Ni catalyst. Model molecules and the fractionation of sugar cane bagasse were used to understand the role of the catalyst and propose reaction pathways. The results showed that the selectivity to desired products could be tuned by balancing hydrogenation and hydro-genolysis capacity, and the support of the catalyst played an important role in product distribution.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Environmental Sciences
Priscila Schroeder, Vinicius Barreto Pereira, Alexander Ventura, Juliana Andrade, Monique Kort-Kamp Figueiredo, Evelize Folly das Chagas, Debora de Almeida Azevedo, Gilberto Alves Romeiro, Raquel Vieira Santana da Silva
Summary: This work examines the valorization of passion fruit seed cake by slow pyrolysis, focusing on the organic compounds in the liquid bioproducts and their potential as biopesticides. The study finds that the aqueous phase of the pyrolysis process shows promising biopesticide activity, with a higher proportion of nitrogenous compounds. Furthermore, the presence of nitrogen derivatives and aromatic hydrocarbons in the bio-oil may contribute to its biopesticide effect.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Environmental Sciences
Barbara D. Lima, Laercio L. Martins, Vinicius B. Pereira, Danielle M. M. Franco, Ignes R. dos Santos, Jandyson M. Santos, Boniek G. Vaz, Debora A. Azevedo, Georgiana F. da Cruz
Summary: Through multiple analytical techniques on two samples collected in Pernambuco in 2019 and 2021, it was found that they have similar saturated biomarkers and triaromatic steroid ratios, indicating they are from the same spilled source. The degradation of n-alkanes, isoprenoids, and cycloalkanes was extensive due to evaporation, photooxidation, and/or biodegradation processes, while less alkylated PAHs were more biodegraded than the more alkylated ones. This was supported by the formation of mono and dicarboxylic acids assessed by GC x GC-TOFMS ESI(-) FT-ICR MS techniques. Three ratios were proposed based on ESI(-) FT-ICR MS results to evaluate the progress of the biodegradation process over time: Ox>2/O, SOx/SO, SOx/N.
MARINE POLLUTION BULLETIN
(2023)
Article
Engineering, Environmental
Vanessa O. Nunes, Adriano C. Fraga, Raquel V. S. Silva, Nathalia S. Pontes, Andrea R. Pinho, Eduardo F. Sousa-Aguiar, Debora A. Azevedo
Summary: The study found that the composition of bio-oil from sugarcane bagasse via hydrothermal liquefaction is influenced by temperature, residence time, catalyst use, and recycling. Operational parameters have different effects on the degrees of reactions, with processed water reuse benefiting reactions. Phenolic compounds formation is affected by temperature and catalyst use.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
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.