Article
Energy & Fuels
Lianlian Xu, Zhongwen Xu, Feng Zhang, Yinmei Yuan, Bin Cheng, Chuang Zhang, Ping Chen, Xiangyong Huang, Yuyu Lin, Mingyan Gu
Summary: This study investigated the synergistic effects of CaO/Al2O3 and three potassium phosphates on the regulation of pyrolysis products in the rice straw pyrolysis. The results showed that the co-catalysis increased the contents of phenols, aldehydes, acids, and ketones, and was suitable for the production of ketone-rich and acid-low bio-oil.
BIOENERGY RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Tae Uk Khang, Min-Jae Kim, Jee In Yoo, Yu Jung Sohn, Sang Goo Jeon, Si Jae Park, Jeong-Geol Na
Summary: This study developed an analysis method using Py-GC/MS to determine PHA contents and monomer composition in microbial cells, providing a rapid and reliable approach for such analysis.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Thermodynamics
Yuan Jiang, Peijie Zong, Bin Tian, Xue Ming, Fanfan Xu, Yuanyu Tian, Yingyun Qiao, Dawei Li, Qingshuo Song, Qiankun Yu
Summary: Studying the pyrolysis behavior of the saturate component in coal, which mainly consists of volatile substances, through the combined utilization of TG-FTIR and Py-GC/MS revealed a free radical reaction mechanism. The research provides a methodological model for exploring other group components and reveals specific details about the pyrolysis of coal.
Article
Biotechnology & Applied Microbiology
Avnish Kumar, Bijoy Biswas, Ramandeep Kaur, Bhavya B. Krishna, Bhaskar Thallada
Summary: Utilization of biomass for energy production has gained attention for its environmental importance. In Loktak lake in India, the growth of paragrass, phumdi, and water hyacinth has a negative impact on ecological stability, prompting the need for effective conversion processes. Analysis showed that the pyrolysis of water hyacinth and paragrass mixture yielded the highest carbonyls, while phumdi had the highest amount of heterocyclic compounds and phenolics.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Weijie Xu, Jingyong Liu, Ziyi Ding, Jiawei Fu, Fatih Evrendilek, Wuming Xie, Yao He
Summary: This study characterized and verified the pyrolysis mechanisms and volatiles products of medical mask belts, mask faces, and infusion tubes. The results are important for the treatment of medical wastes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Applied
Jiaxing Song, Kai Sun, Qunxing Huang
Summary: This study investigated the influence of thermal aging on the pyrolysis oil fuel components of typical waste plastics, showing that the impact varies depending on the type of plastic. After thermal aging, PE and PP exhibited more significant changes in heavy oil fraction compared to light oil and diesel oil fractions, while PVC samples showed structural defects and a color change.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Fangfang Lou, Jun Wang, Chen Sun, Jiaxing Song, Wanli Wang, Yuhan Pan, Qunxing Huang, Jianhua Yan
Summary: Accurate identification and quantification of microplastics (MPs) is challenging yet crucial. This study used pyrolysis gas chromatography mass spectrometry (Py-GC/MS) to detect five common types of MPs and investigated the thermochemical interactions during co-pyrolysis of different plastics. The results showed that previous indicators for quantitative analysis may lead to high uncertainty, but new indicators were proposed in this study to improve accuracy. The maximum quantification uncertainties of PE, PP, and PS were successfully reduced.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Thermodynamics
Ryan D. Merckel, Mike D. Heydenrych, Bruce B. Sithole
Summary: The study presents an advancement in Py-GC/MS with EGA-MS, allowing prediction of elemental composition and calorific content of pyrolysis products. It reduces the need for other analytical methods and demonstrates the impact of various catalysts on pyrolysis oil. Different dominant mechanisms, changes in elemental composition, and effects on calorific value were observed.
Article
Energy & Fuels
Qiang Song, Hongyu Zhao, Qingxiang Ma, Li Yang, Li Ma, Yan Wu, Peng Zhang
Summary: This study investigated the catalytic upgrading of rapid coal pyrolysis using waste hematite. The performances, kinetic parameters, and volatile composition of coal pyrolysis with Fe2O3 and hematite were compared using TG-FTIR and Py-GC/MS. The results showed that iron-based catalysts increased the weight loss rate of coal pyrolysis and reduced the apparent activation energy. The presence of Fe2O3 and hematite also led to a reduction in polycyclic aromatic hydrocarbons and oxygenates in the coal.
Article
Materials Science, Multidisciplinary
Jun Gil Yang, Joo Ho Park, Ji Yeon Kang, Hyun Sik Park, Joo Hyun Park
Summary: The study found that gold solubility in the CaO-SiO2-Al2O3-Fe2O3 slag system increases with increasing slag basicity, while the influence of Fe2O3 and Al2O3 on gold solubility is minimal. Gold is stabilized as the aurate complex ion, and its dissolution reaction into the slag was proposed.
Article
Green & Sustainable Science & Technology
Avnish Kumar, Bijoy Biswas, Komal Saini, Adarsh Kumar, Jitendra Kumar, Bhavya B. Krishna, Thallada Bhaskar
Summary: In the current study, Py-GC/MS analysis was used to characterize the structure and composition of evolving gas from prot lignin. Different catalysts showed significant impact on the type and yield of pyrolysis products, with Co/CeO2 promoting the formation of S-type phenolics at 300 degrees C and Co/TiO2 enhancing the production of H-type phenolics at 600 degrees C.
Article
Chemistry, Analytical
Salman Raza Naqvi, Muhammad Naqvi, Abrar Inayat, Paula Blanco-Sanchez
Summary: This study investigates the impact of synthetic zeolites with different shapes and properties on the products of microalgae pyrolysis, showing that delaminated zeolites can more effectively promote deoxygenation reactions to produce aromatic compounds.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Agricultural Engineering
Douglas Hungwe, Saleem Ullah, Petri Kilpelainen, Sarut Theppitak, Lu Ding, Fumitake Takahashi
Summary: The study found that consecutive hydrothermal treatment and water washing of coconut fibers can effectively remove water-soluble and exchangeable potassium. This pretreatment approach can produce bio-oils that are inorganic-free, thermally stable, and chemically stable.
BIOMASS & BIOENERGY
(2021)
Article
Chemistry, Multidisciplinary
Yan Yang, Shin Ying Foong, Peter Nai Yuh Yek, Abdallah A. A. Mohammed, Meenaksi Verma, Hui Suan Ng, Sang-Chul Jung, Yifeng He, Wanxi Peng, Su Shiung Lam
Summary: This study aims to convert and reuse shellfish waste (SW) by performing pyrolysis to transform it into value-added products. The findings indicate that SW is not suitable for direct use as fuel due to its low high calorific value, but can be transformed into valuable chemicals through pyrolysis. These findings are significant for advancing sustainable waste management strategies and utilizing waste materials in various industries.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Thermodynamics
Qingru Shen, Zewu Fu, Rui Li, Yulong Wu
Summary: In this study, a lignin β-O-4 type dimer model compound was chosen and analyzed using density functional theory (DFT) method combined with Py-GC/MS to investigate its pyrolysis behavior. 9 reasonable reaction paths were studied by DFT, revealing that the main products of the lignin dimer model compound pyrolysis are 2-methoxy-4-vinylphenol and 2-methoxyphenol.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Agricultural Engineering
Nikolay V. Gromov, Tatiana B. Medvedeva, Yulia A. Rodikova, Maria N. Timofeeva, Valentina N. Panchenko, Oxana P. Taran, Ivan V. Kozhevnikov, Valentin N. Parmon
Summary: This study investigated the one-pot synthesis of sorbitol using Ru-containing composites based on H3PW12O40 supported on ZrO2 and Nb2O5 as catalysts. The results showed that Ru-PW/ZrO2 systems were more active than Ru-PW/Nb2O5, with the highest sorbitol yield observed under certain specific reaction conditions. The catalyst showed good stability for multiple reaction cycles without loss of activity.
BIORESOURCE TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ebrahim Gozali, Lars Jarnstrom, Konstantinos Papadikis, Alamin Idris
Summary: This study utilized computational fluid dynamics simulations to evaluate the performance of four different models in a bio-based coating material short-dwell coater. The results showed that viscoelastic models were highly dependent on flow Deborah number for vortex formations, while the shear-thinning phenomena predicted by the Giesekus model tended to relax stress development, contrasting with the Oldroyd-B model.
Article
Chemistry, Physical
Augusto L. P. de Meireles, Kelly A. da Silva Rocha, Elena F. Kozhevnikova, Ivan V. Kozhevnikov, Elena V. Gusevskaya
Summary: The H3PW12O40 heteropoly acid supported on SiO2 as a catalyst and its bulk acidic cesium salt Cs2.5H0.5PW12O40 have been demonstrated to be highly active and recyclable for the Prins cyclization reaction, leading to the efficient synthesis of the valuable floral odorant Florol? from isoprenol and isovaleraldehyde. The use of dimethylcarbonate or diethylcarbonate as green reaction media, along with low catalyst loadings and moderate conditions, contribute to the sustainability of the method.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Physical
Jyoti Gupta, Konstantinos Papadikis, Elena Yu Konysheva, Yi Lin, Ivan Kozhevnikov, Jingjing Li
Summary: The study found that at 500 degrees Celsius, CaO has an impact on oakwood pyrolysis, with CaOOH promoting ketonisation of carboxylic acids and reducing the formation of ether compounds, accelerating hydrogen generation and the multi-step conversion of furfural to cyclopentanone.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Civil
Mengzhu Chen, Konstantinos Papadikis, Changhyun Jun
Summary: The study finds that non-stationary models using rainfall-related covariates perform best for the vast majority of stations, indicating that changes in rainfall patterns remain the dominant driver for flooding changes. Additionally, atmospheric circulation patterns such as NAO and the East Atlantic Pattern are closely related to the non-stationarity of flooding at many stations. Moreover, using multiple covariates can provide a better non-stationary model than using a single covariate for the majority of stations (70%).
JOURNAL OF HYDROLOGY
(2021)
Article
Materials Science, Ceramics
Igor Kolbanev, Anna Shlyakhtina, Evgeniy N. Degtyarev, Elena Yu Konysheva, Nikolay Lyskov, Dmitriy N. Stolbov, Andrey N. Streletskii
Summary: The feasibility of room-temperature synthesis of R10Mo2O21 (R = La, Y, Er) molybdates via mechanochemical processing has been studied. MoO3 dissolution in R2O3 is the initial stage of synthesis. In Er and Y systems, starting oxides and synthesized molybdates have the same bixbyite structure, and the use of nanosized MoO3 has a slight impact on the synthesis process.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
A. Shlyakhtina, N. Lyskov, A. N. Shchegolikhin, I. Kolbanev, S. A. Chernyak, E. Yu Konysheva
Summary: The study indicates that in Ln(2)(Hf(2-x)Ln(x))O7-x/2 (Ln = Sm, Eu; x = 0.1) pyrochlores, Eu cations are most readily oxidized and reduced, and oxidation in air significantly reduces their conductivity. Additionally, changes in the oxygen sublattice near 800 degrees Celsius may result in anomalous low-frequency behavior of the dielectric constant.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Meigeng Gao, Elena Yu Konysheva, Jun Yang
Summary: LSCF ceramics with different porosities were fabricated through temperature variation, and the kinetics of Cr adsorption were studied. Different dominant mechanisms of Cr chemisorption were identified on ceramics with different porosities, indicating the importance of porosity in the Cr adsorption process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Mechanics
Han Zhang, Konstantinos Papadikis, Stephen J. Shaw
Summary: Immiscible displacements in porous media are significantly influenced by the topological features of the porous medium, affecting permeability and capillary pressure differently. Pore space connectivity strongly influences fluid phase distribution and fragmentation patterns, depending on the displacement process.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2022)
Article
Energy & Fuels
Adel Baimoldina, Konstantinos Papadikis, Elena Yu. Konysheva
Summary: The size variation of α-Fe2O3 catalysts has a substantial effect on the distribution of products in the catalytic upgrading of pinewood pyrolysis vapors. The FS221 catalyst shows the most potent effect on reducing phenols, while the FS054 catalyst has a stronger impact on the decrease of creosol and other phenols. Applying a dual-size mixture (FS054-FS221) has a synergetic effect in reducing the content of phenols, acids, and aldehydes.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Yuwei Zhang, Lulu Kong, Elena Yu. Konysheva, Xiaoxiang Xu
Summary: This study demonstrates the importance of heterogeneous interfaces in separating photocarriers, showing that excellent heterogeneous interfaces can be built in Ta3N5@CaTaO2N heterostructures, enabling rapid spatial photocarrier separation and enhancing photocatalytic activity. It highlights the potential of heterostructures for efficient solar water splitting.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Alexey Philippov, Nikolay Nesterov, Vera Pakharukova, Ivan Kozhevnikov, Oleg Martyanov
Summary: This study investigates the effect of Cu on the catalytic activity and selectivity of Ni-Cu catalysts in transfer hydrogenation, and finds that the addition of Cu leads to deactivation of the catalyst during the conversion of anisole.
Article
Mechanics
Han Zhang, Konstantinos Papadikis, Stephen J. Shaw
Summary: In this study, a multi-relaxation time lattice-Boltzmann model is used to investigate the dynamic evolution of two immiscible phases through a randomly generated porous structure. The impact of the morphological properties of the porous structure on a water-wet, oil-water two-phase flow is studied, and variations in pore space connectivity and topology are quantified. It is found that the wetting phase saturation and pore network homogeneity significantly affect the dynamic evolution of the non-wetting phase topology, and the macro-scale steady-state based on the velocity field does not imply temporal topological invariance of the displaced phases. The transient dynamics of the two-phase flow is monitored and quantified through hydrodynamic and topological parameters.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
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)
