Article
Energy & Fuels
Jianxun Wu, Chao Ma, Weilai Zhang, Weifeng Chang, Yahe Zhang, Quan Shi
Summary: In this study, molecular characterization of sulfur compounds in a whole crude oil was conducted using gas chromatography and mass spectrometry techniques. The crude oil was separated into different fractions and different sulfur compounds were identified and characterized. The study found that the type and content of sulfur compounds vary significantly among the different distillation fractions.
Article
Plant Sciences
Melissa Salinas, James Calva, Luis Cartuche, Eduardo Valarezo, Chabaco Armijos
Summary: The aim of this study was to extract and identify the chemical compounds of Diplosthephium juniperinum essential oil (EO) from Ecuador and to assess its anticholinesterase and antioxidant properties. The EO was found to have a moderate inhibitory effect on AChE and BuChE enzymes, as well as a lower antioxidant potential. This is the first report on the chemical composition and biological activities of the EO from D. juniperinum.
Article
Thermodynamics
Lu Yao, Jianhua Zhu, Shuyuan Li, Yue Ma, Changtao Yue
Summary: The experiments of rapid thermal pyrolysis and catalytic pyrolysis of high density polyethylene (HDPE) were conducted using Py-GC/MS. The distribution of products and the influence of catalyst on pyrolysate production were investigated. The results revealed the reaction paths and the effects of catalyst on product composition.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Agricultural Engineering
Hamid Ahadi, Majid Shokrpour, Reza Fatahi, Mohammad Reza Naghavi, Mohammad Hossein Mirjalili
Summary: The metabolic diversity of 24 Iranian Rosa damascena genotypes was studied, and major compounds and phytochemical markers were identified. This study provides valuable information for further commercial cultivation and production of essential oils, flavonoids, and anthocyanins.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Nutrition & Dietetics
Sookyoung Kim, Haeun Lee, Kwang-Geun Lee
Summary: In this study, furan analysis was conducted on dried red pepper powder treated by three cooking methods (boiling, roasting, and frying). The results showed that cooking with edible oil resulted in higher furan concentration compared to water-based cooking. Higher heating temperature and time also led to higher furan concentration.
FRONTIERS IN NUTRITION
(2022)
Article
Energy & Fuels
Jianxun Wu, Weilai Zhang, Yuanfeng Wang, Yahe Zhang, Quan Shi
Summary: A series of novel carotenoid-derived non-thiadiamondoids cage organic sulfur compounds (OSCs) were identified from crude oil. Non-polar sulfur compounds were isolated using the methylation/demethylation method and characterized using FT-ICR MS and GC-MS. The cage OSCs were tentatively identified as 2-thiatricyclo[4.4.0.0<3.8>]decanes. These novel OSCs were found to be generated by biological sulfate reduction, providing new clues for the preservation of hydrocarbons in geological environments through sulfurization. The cage OSCs have the potential to be biomarkers for studying sedimentary environments.
Article
Chemistry, Analytical
Purna K. Khatri, Mauro Paolini, Roberto Larcher, Luca Ziller, Dana Alina Magdas, Olivian Marincas, Alberto Roncone, Luana Bontempo
Summary: The combination of GC-MS/MS and GC-IRMS methods is effective to control false declaration in various food matrices, including lavender essential oil. The developed GC-MS/MS method allows for the determination of volatile organic compounds in lavender essential oil, while the GC-IRMS method characterizes the isotope ratios of carbon and hydrogen in the oil. Both methods have been validated and shown to be sensitive, precise, and accurate.
MICROCHEMICAL JOURNAL
(2023)
Article
Horticulture
Biljana Kiprovski, Tijana Zeremski, Ana Varga, Ivana Cabarkapa, Jelena Filipovic, Biljana Loncar, Milica Acimovic
Summary: The aim of this study was to test the quality and bioactivity of lavender and lavandin essential oils cultivated in Serbia. The results show that most of the essential oils meet the standard requirements for lavender essential oil composition and exhibit high antimicrobial and antioxidant activities. This preliminary research reveals the potential of lavender essential oils for medicinal and aromatic plant species production and agricultural diversification.
Article
Biochemistry & Molecular Biology
Giuseppe Micalizzi, Filippo Alibrando, Federica Vento, Emanuela Trovato, Mariosimone Zoccali, Paolo Guarnaccia, Paola Dugo, Luigi Mondello
Summary: An optimized microwave distillation method was developed for the extraction and isolation of cannabis essential oil, yielding a product rich in terpenes and terpenoid compounds. Characterization and absolute quantification of the distillate from different hemp cultivars were achieved using gas chromatography equipped with mass spectrometer and flame ionization detectors. Additionally, an enantio-GC-MS method was established to evaluate the enantiomeric distribution of chiral compounds.
Article
Biochemical Research Methods
Ming-Zhu Hou, Lin-Lin Chen, Cong Chang, Jun-Feng Zan, Shi-Ming Du
Summary: Artemisia argyi is used in traditional Chinese medicine to treat gynecological and respiratory diseases, with its essential oil considered as the major active ingredients. A study developed a rapid, sensitive, and selective method for quantifying the distribution of these volatile constituents in rat plasma and tissues. The results provide insight for guiding pharmacodynamic studies and clinical applications of this herbal medicine.
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
(2021)
Article
Chemistry, Applied
Junhua He, Xuehui Wu, Zhiliang Yu
Summary: This study investigated the characteristic volatile compounds and aroma activity of camellia seed oil (CSO) from microwaved seeds at different processing times using electronic nose, HS-SPME-GC-MS, and HS-GC-IMS. The results showed that the processing time had a significant impact on the volatile compounds and aroma profile of CSO, with different compounds being dominant at different processing times.
Article
Environmental Sciences
Andres Martinez, Jason B. X. Hua, Ezazul Haque, Keri C. Hornbuckle, Peter S. Thorne
Summary: This study reports the levels and distribution of polychlorinated biphenyls (PCBs) in residential soils in East Chicago, Indiana. The PCB concentrations were found to be relatively high and influenced by nearby contamination sites. The concentrations increased with the total organic carbon content and proximity to the contaminated area. Despite the higher concentrations compared to other locations, the samples were still below the current soil remediation goal.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Shuang Wang, Shuang Zhao, Xiaoxue Cheng, Lili Qian, Bahram Barati, Xun Gong, Bin Cao, Chuan Yuan
Summary: This study examined the conversion of Enteromorpha clathrata into bio-oil through hydrothermal liquefaction, finding that a two-step reaction method can increase bio-oil yield and improve quality.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Applied
Binsheng Luo, Ertan Kastrat, Taylan Morcol, Haiping Cheng, Edward Kennelly, Chunlin Long
Summary: Gaultheria longibracteolata has been traditionally used by different linguistic groups in Yunnan Province, China for various purposes. The essential oil from this plant contains methyl salicylate as the main component (> 90%) and exhibits antimicrobial activity. Further studies are needed to develop it as a natural wintergreen oil substitute.
Article
Chemistry, Analytical
Hector Hernando, Gema Gomez-Pozuelo, Juan A. Botas, David P. Serrano
Summary: Fractional pyrolysis of lignocellulosic biomass was assessed as a method to in-situ speciate bio-oil components, showing potential for extracting valuable compounds or for catalytic upgrading. Selecting operational temperatures of 350 and 700 degrees C, the fractional thermal treatment of wheat straw and pine woodchips led to reduced bio-oil yield but improved properties, with significant differences observed in the bio-oil composition obtained at the two steps.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(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.