Article
Chemistry, Physical
Hanxiang Chen, Shuting Hou, Haoyuan Cui, Chao Wang, Ming Zhang, Hongping Li, Hui Xu, Jiqing Wu, Wenshuai Zhu
Summary: The interfacial properties and active site distribution of catalysts have a significant impact on catalytic oxidative desulfurization activity, which has been a research focus in recent years. In this study, an amphiphilic and polyoxometalate poly(ionic liquids) were prepared through cross-linking copolymerization and ion exchange reaction for desulfurization in fuel. The resulting sample, p-C2VIM-DVB-2-PMo, exhibited enhanced desulfurization performance and good thermal stability, meeting the requirements for deep desulfurization. Density functional theory calculations were also utilized to investigate the adsorption strength and interaction nature between the cation and sulfide compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Huifang Liu, Chengpeng Liu, Ni Zhen, Jing Dong, Yingnan Chi, Changwen Hu
Summary: A straightforward emulsion assisted assembly strategy has been developed to fabricate amphiphilic polyoxoniobates (PONbs) composite, which can effectively catalyze oxidative desulfurization under mild conditions and enable automatic separation and recycle of products and catalysts for consecutive use.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Xiao-Xiao Xing, Hui -Li Guo, Tong Feng, Tian-Meng He, Wen-Shuai Zhu, Hua-Ming Li, Jing-Yu Pang, Yan Bai, Dong-Bin Dang
Summary: In this study, a series of catalysts [Cnmim]5VW12O40Br (CnVW12) with different alkyl chain lengths were used for the catalytic oxidation of dibenzothiophene (DBT) and its derivatives at room temperature. The impact of catalyst amount, oxidant, and temperature on the reaction process were investigated. Among them, C16VW12 exhibited higher catalytic performance, achieving 100% conversion and selectivity in 50 minutes with only 10 mg of catalyst. The mechanism study revealed that the hydroxyl radical played a crucial role in the reaction. Furthermore, the use of a polarity strategy resulted in the accumulation of sulfone products with a yield of approximately 84% and 100% purity after 23 cycles in the C16VW12 system.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
A. V. Akopyan, A. O. Shlenova, P. D. Polikarpova, A. V. Vutolkina
Summary: A new heterogeneous catalyst with two types of active sites has been synthesized and shown to efficiently convert dibenzothiophene under specific conditions. The catalyst is stable under oxidation conditions and retains its activity after multiple cycles.
PETROLEUM CHEMISTRY
(2022)
Article
Engineering, Chemical
Dinara Muktaly, Argam Akopyan, Zhannur Myltykbaeva, Yerzhan Imanbayev
Summary: This study presents the results of the oxidative desulfurization process, which demonstrates the possibility of obtaining a gasoline fraction with ultra-low sulfur content through oxidation and rectification of gas condensate. Optimum conditions for sulfur compound oxidation and subsequent gas condensate rectification have been determined.
Article
Materials Science, Multidisciplinary
Kunyue Leng, Zheng Han, Dingding Li, Xiaolin Li, Yi Wang, Hang Zhao
Summary: Ti-containing porous materials are extensively studied for liquid-phase oxidative desulfurization, showing excellent performance with organic oxidants but relatively poor affinity with H2O2. However, a Ti-MIL-101 catalyst was developed to improve efficiency in oxidative reactions with H2O2, reducing sulfur content and increasing TOF value.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Organic
A. Akopyan, E. A. Eseva, N. Arzyaeva, M. Yu Talanova, P. D. Polikarpova
Summary: This study investigated the oxidative desulfurization of straight-run naphtha fraction using a heterogeneous catalyst containing two active sites. By combining an acid component and a transition metal, the catalyst HPMo-NA-SBA-15 with SBA-15 support demonstrated high performance. The binding of nicotinic acid fragments to the support and phosphomolybdic acid anion prevented the loss of the active phase, leading to stable catalyst performance in multiple oxidation/regeneration cycles. Under optimized conditions, a naphtha fraction with ultralow sulfur content (5 ppm) was obtained.
PETROLEUM CHEMISTRY
(2022)
Article
Engineering, Environmental
Jasim I. Humadi, Saba A. Gheni, Safaa M. R. Ahmed, Ghassan H. Abdullah, Anh N. Phan, Adam P. Harvey
Summary: This study developed a highly efficient, rapid oxidative desulfurization (ODS) process for continuous removal of sulfur contaminants in diesel fuels. By optimizing the operating conditions, up to 94% of DBT could be removed in a short amount of time without the need for further extraction.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Materials Science, Multidisciplinary
Qikai Tian, Jing Zhang, Jing Yan, Shaobin Zhang, Ziyi Yu
Summary: Pickering interfacial biocatalysis has gained significant attention due to the need for cleaner and more efficient chemical industry. The crucial step in this process is the preparation of enzyme-loaded particles, which often involves complex modification and functionalization processes. This study presents a one-step method to generate polymer nanoparticles with innate carboxyl functional groups, offering adjustable wettability and excellent reusability and storage stability for the immobilized enzymes.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Environmental Sciences
Anjali A. Ingle, Shahid Z. Ansari, Diwakar Z. Shende, Kailas L. Wasewar, Aniruddha B. Pandit
Summary: This paper reviews the improvement and application of catalytic hydrogenation in the production of hydrogen peroxide. The study found that supported metal catalysts exhibited better catalytic performance in terms of activity and selectivity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Linghao Li, Wei Wang, Jian Huang, Rongmin Dun, Bowen Lu, Yiwei Liu, Jingxian Wu, Siyu Yang, Zile Hua
Summary: Based on additional freeze-drying of gel precursors and routine steam assisted crystallization (SAC) treatment, submicrometer-sized hierarchical TS-1 aggregates, named as aggTS-1, were synthesized and showed high crystallinity, abundant stacked mesopores, and preferential surface distribution of active titanium sites. These aggTS-1 materials exhibited easy isolation, high activity, and recyclability in catalytic oxidative desulfurization reactions of fuel oils. Moreover, the study confirmed the critical effect of water concentration on the particle morphology and formation process of nanozeolite aggregates.
Article
Chemistry, Physical
Keyang Qin, Wenxiang Zhu, Meng Wang, Jie Wu, Mengjie Ma, Jinxin Chen, Fan Liao, Zhenhui Kang, Mingwang Shao
Summary: This study successfully prepared one-dimensional iridium nanowires with compressive stress combined with carbon dots as an electrocatalyst for hydrogen evolution/oxidation reactions. The optimal catalyst showed high catalytic activity and excellent anti-CO toxicity ability. The enhanced catalytic activity of the catalyst is attributed to the modulation of hydrogen intermediate binding energy and improved proton/electron transfer kinetics through the application of compressive stress and optimization of surface structure.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Biochemistry & Molecular Biology
Dinis F. Silva, Alexandre M. Viana, Isabel Santos-Vieira, Salete S. Balula, Luis Cunha-Silva
Summary: An effective and sustainable process capable of simultaneously desulfurizing and denitrogenating fuels is essential in the refinery industry. A novel heterogeneous catalyst was developed using imidazolium-based polyoxometalate encapsulated in a ZIF-8 framework, exhibiting exceptional efficiency in removing sulfur and nitrogen compounds from multicomponent model fuels.
Article
Biochemistry & Molecular Biology
Fatima Mirante, Ricardo F. Mendes, Rui G. Faria, Luis Cunha-Silva, Filipe A. Almeida Paz, Salete S. Balula
Summary: The application of a catalytic membrane in the oxidative desulfurization process showed significant advantages over traditional powdered catalysts in terms of ease of handling and cost-efficiency. The catalytic membrane allowed for near complete desulfurization under sustainable conditions and could be successfully recycled for multiple desulfurization cycles without the need for washing and drying procedures.
Article
Biochemistry & Molecular Biology
Jie Zhao, Bingquan Wang, Rui Wang, Ivan V. Kozhevnikov, Korchak Vladimir
Summary: Amphiphilic hybrid catalysts were prepared by modifying [SMo12O40](2-) with tetrabutylammonium bromide (TBAB), 1-butyl-3-methylimidazole bromide (BMIMBr), and octadecyl trimethyl ammonium bromide (ODAB). The catalysts were characterized by various techniques and showed favorable activity for removing sulfur compounds at room temperature in model oil and actual diesel. Different catalysts exhibited varying levels of removal effect, with [TBA](2)SMo12O40 catalyst showing the best performance.
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.