Article
Energy & Fuels
Hao Xu, Yang Song, Yanyan Zhang, Hua Song
Summary: The better utilization of low-quality oil resources is crucial for sustainable development, and the direct use of methane demonstrates unique advantages for upgrading vacuum residue, leading to reduced operational cost and CO2 emission. The novel technology with high feasibility, stability and applicability shows huge commercial potential in heavy oil valorization in the oil & gas industries.
Article
Chemistry, Physical
Xiangyang Zhu, Dong Qiao, Liangrong Yang, Qinling Bi, Huifang Xing, Shan Ni, Menglei Yuan, Huizhou Liu, Luhai Wang, An Ma
Summary: A novel hybrid material of carbon covered Fe3O4 nanoparticles and MoS2 nanoflower (FCM) was prepared by micelle-assisted hydrothermal methods. Characterization techniques including XRD, HRTEM, and XPS were used to show that FCM has superior catalytic hydrocracking activity and easy recovery by external magnetic field.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Energy & Fuels
Ravindra Prajapati, Kirtika Kohli, Samir K. Maity
Summary: Slurry hydrocracking is an emerging technology for upgrading residues and producing valuable distillate products. A study has shown that a hydrothermally synthesized nanoflower molybdenum sulfide catalyst exhibits higher hydrocracking and hydrotreating activities due to its highly active defect structure and abundant hydrogenation sites.
Article
Environmental Sciences
Chen Hong, Yifei Li, Yanxiao Si, Zaixing Li, Yi Xing, Xiaonan Chang, Zixuan Zheng, Jiashuo Hu, Xiumei Zhao
Summary: Catalytic removal of nitrogen and oxygen from antibiotic fermentation residue (AR) bio-oil was studied under fast pyrolysis conditions using various metal catalysts. The results showed that the metal catalysts effectively reduced nitrogen and oxygen content in the bio-oil, leading to an improvement in its quality.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Sandeep Kumar, Abhishek Kumar, Tania Malhotra, Sakshi Verma
Summary: Pure and silver doped α-Fe2O3 semiconductor nanoparticles were synthesized and characterized in terms of their structural, optical, and surface electronic properties. The study found that silver doping had a marginal effect on the crystal structure and bandgap of the nanoparticles, and improved the dye degradation efficiency of the iron oxide nanocatalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Ahmad Nasir Pulungan, Ronn Goei, Agus Kembaren, Nurfajriani Nurfajriani, Junifa Layla Sihombing, Saharman Gea, Hana Ria Wong, Muhammad Irvan Hasibuan, Rahayu Rahayu, Alfred Iing Yoong Tok
Summary: The quality of bio-oil produced from oil palm fronds was enhanced through esterification pre-treatment and hydrodeoxygenation reaction. The catalyst used in the reaction was mixed metal oxide anchored within zeolite mordenite. The presence of metal oxides on the catalyst's surface increased its activity in producing liquid products and reducing coke formation. Upgrading the bio-oil improved its physicochemical properties compared to the one-stage upgrading process.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Zarrin Nasri
Summary: This study investigated the effects of operational conditions on SARA fractions during the upgrading of vacuum residue using microwave irradiation. The results showed that under the optimal conditions, the chemical composition of the feedstock was substantially improved.
PETROLEUM SCIENCE AND TECHNOLOGY
(2021)
Article
Energy & Fuels
Weiwei Feng, Bin Zheng, Qingyan Cui, Tinghai Wang, Pei Yuan, Haibo Zhu, Yuanyuan Yue, Xiaojun Bao
Summary: It was found that the Mo/ASA-4 catalyst exhibited the highest exposure of Mo active sites and hydrogenation activity, resulting in higher hydrocracking yields and inhibition of over cracking of intermediate products.
Article
Energy & Fuels
Qing-Yan Cui, Hao-Bin Zhang, Ting-Hai Wang, Chao Yan, Yan-Ning Cao, Yuan-Yuan Yue, Li-Long Jiang, Xiao-Jun Bao
Summary: The study focused on the preparation and performance of rectorite-supported catalysts, revealing that the calcination of rectorite helped improve the yields of naphtha and middle distillates in slurry-phase hydrocracking of vacuum residue.
Article
Engineering, Chemical
Weixiang Lin, Yinglong Wu, Gangchuan Su, Juan Xiao, Simin Wang
Summary: Ultrasound irradiation was used to treat vacuum residue (VR) in this study. The results showed that acoustic cavitation caused the evaporation of light aliphatic components, breaking of alkyl side chains on aromatic rings or aliphatic chains, and relaxation or disaggregation of macroaromatic cores. Furthermore, ultrasound treatment increased the light fraction productivity of VR.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Vijay Tripathi, Panyala Linga Reddy, Pankaj E. Hande, Dharmendra S. Vishwakarma, Dipak J. Fartade, Leela S. Panchakarla, Santosh J. Gharpure
Summary: Designed CoNi bimetallic catalysts on various supports were synthesized and tested for selective hydrogenation reactions. Amongst these, the newly developed CoNi@gC(3)N(4) nanocatalyst demonstrated a unique reactivity profile, showing high efficiency in selective hydrogenation of various chalcone derivatives and nitroarenes in the presence of other reducible functional groups. The prepared bimetallic catalyst has advantages over the reported methods in terms of catalytic activity under mild conditions, selectivity, and reusability.
Article
Chemistry, Physical
Changchang Ma, Jeongwoo Lee, Youjoong Kim, Won Cheol Seo, Hyun Jung, Woochul Yang
Summary: The Z-scheme BiVO4/alpha-Fe2O3 photocatalyst, synthesized by a simple hydrothermal method, showed improved photocatalytic activity in the photodegradation of tetracycline hydrochloride compared to pure BiVO4 and alpha-Fe2O3 nanocubes under visible light irradiation. The study revealed that the formation of a Z-scheme heterojunction between BiVO4 and alpha-Fe2O3 increased the specific surface area and promoted the separation of photoinduced carriers, leading to enhanced photocatalytic performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Jinhuan Yao, Hongyu Li, Yanwei Li, Jianwen Yang, Botian Liu
Summary: In this study, alpha-Fe2O3 electrode materials were synthesized using three kinds of iron simulation solution systems. The microstructure and lithium storage performance of the materials were systematically studied. Results showed that samples prepared from sulfate solutions exhibited high lithium storage activity but experienced capacity fluctuation, while samples from FeCl3 solution demonstrated better cycling stability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Applied
M. Maya Pai, Basappa C. Yallur, Sheetal Batakurki, Pravin Kendrekar
Summary: Two films of Chitosan-ZnO-alpha-Fe2O3 nanocatalyst were synthesized and characterized in this study. The results indicated that the synthesized catalysts were efficient in reducing nitro groups.
TOPICS IN CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Sepideh Gholizadeh Khasevani, Mandana Taheri, Mohammad Reza Gholami
Summary: The study introduced the production and performance evaluation of environmentally friendly catalyst and photocatalyst based on Ag, Pt, and Ag-Pt nanoparticles loaded on the γ-Fe2O3/CuO nanocomposite. The results showed that AgPt@γ-Fe2O3/CuO exhibited outstanding catalytic and photocatalytic performance, with high electron transfer and acceptance capacity, demonstrating fast charge carrier transfer and high synergistic effect.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Automation & Control Systems
Mohammad Fakhroleslam, Ramin Bozorgmehry Boozarjomehry, Shohreh Fatemi, Elena De Santis, Maria Domenica Di Benedetto, Giordano Pola
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
(2019)
Article
Chemistry, Multidisciplinary
Hadi Rezvani, Shohreh Fatemi
SEPARATION SCIENCE AND TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Samira Mehravar, Shohreh Fatemi, Masaharu Komiyama
DIAMOND AND RELATED MATERIALS
(2020)
Article
Energy & Fuels
Marjan Razavian, Shohreh Fatemi
Article
Energy & Fuels
Samira Mehravar, Shohreh Fatemi, Masaharu Komiyama
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2020)
Article
Chemistry, Physical
Samira Mehravar, Shohreh Fatemi, Masaharu Komiyama
SURFACE AND INTERFACE ANALYSIS
(2020)
Article
Chemistry, Analytical
Marjan Razavian, Shohreh Fatemi
Summary: The study investigated the use of MOF catalysts in upgrading heavy fuel oil, enhancing catalytic performance through element doping for improved upgrading results. Mo-doped MAF-6 showed higher yields of light and middle distillates, increased asphaltene conversion, and greater viscosity reduction compared to thermal upgrading.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Physical
Fatemeh Nasr Azadani, Shohreh Fatemi, Narges Salehi Ardali
Summary: A kinetic model was proposed for the benzene alkylation with ethane reaction over PtH-ZSM-5 catalyst, which accurately predicted experimental data and optimized reaction conditions to improve ethylbenzene yield.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Engineering, Chemical
Mehraneh Fakheri, Shohreh Fatemi, Reza Rahimi Kakolaki
Summary: In this study, nitrogen-doped carbon quantum dots (N-CQDs), N-F codoped carbon quantum dots (CQDs), and N-S codoped CQDs were synthesized using three different methods, including electrochemical, solvothermal, and pyrolysis, with monoethanolamine and citric acid precursors. Ammonium fluoride and/or thiourea were used as the precursors for the second dopant. Factors affecting the synthesis parameters were examined to optimize the absorption edge and reduce the band gap in UV-visible spectroscopy. The best results were obtained with the pyrolysis method, which yielded N-F/CQDs with the highest absorption edge of 650 nm, a band gap of 1.91 eV, and a particle size of 24 +/- 7 nm. X-ray photoelectron spectroscopy (XPS) analysis confirmed the simultaneous doping of F and N atoms in the CQDs structure, and photoluminescence (PL) analysis revealed excitation-dependent properties suitable for optical sensor and solar cell applications.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Mehraneh Fakheri, Shohreh Fatemi
Summary: Nitrogen-fluorine codoped graphene quantum dots (N, F-GQDs) were synthesized through a one-pot hydrothermal method using glucose and ammonium fluoride (AF). The composition of nitrogen and fluorine with GQDs by AF was optimized to approach the highest light absorption edge in UV- visible spectroscopy and receive upconversion properties in photoluminescence (PL) analysis. The best cell with N, F-GQD0.07/TiO2/ FTO photoanode improved the efficiency, open circuit voltage, and short circuit current density, from 0.07 to 0.51, 370 to 699 mV, and 0.3 to 1.2 mA/cm2, respectively, compared to the cell fabricated by the blank TiO2/FTO photoanode.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Analytical
Shabnam Gharibi, Shohreh Fatemi, Farouk S. Mjalli, Rashid Al-Hajri
Summary: In this study, non-catalytic co-pyrolysis of petroleum vacuum residue (VR) and polypropylene (PP) was conducted in a batch condition under CO2 and/or steam atmospheres. Statistical analysis showed that CO2 + steam environment was more effective in reducing asphaltene formation and suppressing coke formation. The addition of PP improved the yield and quality of the liquid product and reduced the coke content. Optimum conditions for the pyrolysis reaction were determined, resulting in high maltene yield, reduction of asphaltene and coke, and improved quality of the upgraded oil. The pyrolysis of VR with PP in the CO2 + steam environment was considered an economically viable and environmentally friendly technique for transforming low-grade VR feedstocks to valuable liquid fuels without using catalysts.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Physical
Faeze Sadat Hosseini, Shohreh Fatemi, Amideddin Nouralishahi
Summary: Mesoporous carbon-nitrogen doped ZnO powders were synthesized from ZIF-8 through thermal decomposition under nitrogen and air atmospheres. The prepared material exhibited significant photocatalytic activity for acetaldehyde degradation under visible light irradiation. The optical and morphological properties of the samples were characterized, and the results showed that the absorption edge of the prepared samples was shifted to the visible range. The photocatalytic activity of the samples was much higher than that of the bare ZIF-8 and commercial ZnO powder. The sample prepared by N2 thermal decomposition of ZIF-8 at 600 degrees C for 120 min, followed by air annealing at 450 degrees C for 90 min, achieved a removal rate of about 90% for acetaldehyde.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Engineering, Environmental
Marjan Razavian, Shohreh Fatemi, Ali Taheri Najafabadi
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)
Article
Chemistry, Physical
Masomeh Ezati, Shohreh Fatemi, Maede Salmasi
IRANIAN JOURNAL OF CATALYSIS
(2019)
Article
Engineering, Environmental
Hadi Rezvani, Shohreh Fatemi, Javad Tamnanloo
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)
Article
Chemistry, Physical
P. Belmonte, J. M. Garcia-Vargas, J. F. Rodriguez, I. Garrido, M. T. Garcia, M. J. Ramos
Summary: In this study, four polythiourethane films with different types of polyols and isocyanates were synthesized, characterized, and foamed. The results showed that the type of isocyanate greatly influenced the crystallinity and stiffness of the polymers, while the type of polyol modified the FT-IR spectra and the decomposition curve of the material with temperature. Furthermore, the choice of isocyanate also affected the properties of the foams obtained from the polymeric material.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Xutao Zhu, Jianguo Yan, Shouchun Liu, Fengling Zhu
Summary: This study experimentally assessed the hydrodynamic characteristics of supercritical-pressure R134a in a horizontal circular tube. It was found that the hydrodynamic characteristic curve of R134a under supercritical pressure does not have a negative-slope region but a transition region. The transition region becomes more evident with increasing heat flux, while it weakens with increasing pressure and inlet temperature. Moreover, the onset of the transition region shifts in the direction of high mass flow rate with increasing heat flux.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Stefania Mottola, Iolanda De Marco
Summary: In this study, corticosteroids were micronized with cyclodextrin using Supercritical Assisted Atomization (SAA), resulting in spherical micrometric particles with improved dissolution time.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Honghai Liu, Yu Xie, Zhilan Li, Xiaokai Zhang
Summary: This study compared the effects of supercritical carbon dioxide dewatering (SCD) and conventional kiln drying (CKD) at a temperature of 55 degrees C on the dewatering rate, moisture transfer and distribution, shrinkage, and stress characteristics of bamboo strips. The results showed that SCD had a faster dewatering rate and lower shrinkage compared to CKD, but was less effective in reducing drying stress in bamboo.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Tahmasb Hatami, Ozan N. Ciftci
Summary: This study fills the gap in previous research by establishing a hierarchy of significance for factors affecting SFE profitability, providing a deeper understanding of how technical and economic factors impact profitability. The findings highlight that the SFE facility becomes profitable when the extractor capacity surpasses 42 L.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Tingshan Guo, Chuang He, Zhiyuan Liang, Qinxin Zhao
Summary: The initial oxidation behavior of Fe10Cr and Fe20Cr alloys in supercritical H2O and supercritical CO2 with O2 has been investigated. The results show that O2 has the highest adsorption energy on FeCr alloys and reacts faster than H2O and CO2.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Vikash Chandra Roy, Jin-Seok Park, Ahmed Redwan Haque, Md Sadek Ali, Hee-Jeong Lee, Byung-Soo Chun
Summary: This research aimed to valorize brewery spent grain (BSG) using subcritical water hydrolysis (SWH) modified by six different natural deep eutectic solvents (DES) and determining their bipotentialities. The findings showed that BSG hydrolysates obtained through DES-induced SWH contained high levels of sugars, proteins, flavonoids, phenolic compounds, and essential amino acids. The hydrolysates also demonstrated antimicrobial activities, and the presence of bioactive compounds was confirmed through FT-IR analysis. This comprehensive profiling of bioactive compounds from BSG using DES-mediated SWH can contribute to the efficient valorization of BSG for industrial purposes.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Kailiang Zhang, Hanyu Wang, Tong Liu, Zhu Wang, Lvxing Wang, Ping Fan, Feng Chen, Mingqiang Zhong, Bozhen Wu, Shanqiu Liu, Jintao Yang
Summary: This study investigates the influence of foam cell structure on the electromagnetic interference shielding performance of conductive polymer composite foam. The results suggest that foamed composites exhibit improved EMI shielding performance, and bimodal cell foams have higher electric conductivity but lower EMI shielding compared to uniform cell foams.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Jaromir Valtr, Petr Roztocil, David Dasek, Radek Musalek, Frantisek Lukac, Jakub Klecka, Marek Janata, Mariana Arnoult-Ruzickova, Eva Mistova, Ludek Jelinek, Petr Sajdl, Jan Macak
Summary: This paper focuses on the design of an experimental facility for in-situ electrochemical testing at supercritical water conditions, including the design of the electrode system and surface insulation coating for electrode leads.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)
Article
Chemistry, Physical
Richard Djimasbe, Mikhail A. Varfolomeev, Nailya M. Khasanova, Ameen A. Al-Muntaser, Rustam R. Davletshin, Muneer A. Suwaid, Gazinur Z. Mingazov
Summary: This study confirms the capability of supercritical water to generate active hydrogen that interacts with different fractions in unconventional feedstocks, leading to synthetic oil production during hydrothermal reactions. The findings suggest that a maximum yield of 16.78% can be achieved at a temperature of 380 oC and a reaction time of 1-12 hours.
JOURNAL OF SUPERCRITICAL FLUIDS
(2024)