Article
Energy & Fuels
Fuqing Gong, Naiwang Liu, Li Shi, Xuan Meng
Summary: It was found that treating MCM-22 zeolite with NaOH significantly enhanced its catalytic activity in the oligomerization of 1-decene. Increasing the NaOH treatment time resulted in higher conversion rate and dimer selectivity. After being treated with a 0.1 mol/L NaOH solution for 7 hours, the conversion increased from 68% to 76% and dimer selectivity increased from 49% to 61%. The NaOH-treated MCM-22 zeolite showed improved catalytic performance even after regeneration by roasting at 550 degrees C.
Article
Chemistry, Applied
Ahad Hanifpour, Naeimeh Bahri-Laleh, Mehdi Nekoomanesh-Haghighi, Albert Poater
Summary: A series of new titanium (IV) complexes with tetradentate diamine-diphenolates were synthesized, showing high activities in 1-decene oligomerization experiments. The oligomers obtained by Cat3 exhibited the highest isotacticity value. The molecular weight of the obtained oligomers was found to be closely related to the ligand structures.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Snunkhaem Echaroj, Channarong Asavatesanupap, Sumaeth Chavadej, Malee Santikunaporn
Summary: A promising production route for high-quality lubricant base stock involves oligomerizing high molecular-weight olefins in a high energy efficiency system. The study on oligomerization of 1-decene over a HY zeolite catalyst in a microwave-assisted system showed that higher reaction temperatures resulted in increased formation of dimers and trimers. Kinetic models were formulated for the dimerization and trimerization reactions, with apparent activation energies of 70.8 ± 0.8 and 83.6 ± 0.9 kJ/mol, respectively.
Article
Chemistry, Multidisciplinary
Cunhui Zhou, Wenqian Li, Minghuang Qiu, Wanting Li, Honglei Liu, Hongjiang Liu, Kun Zhang, Xinqing Chen
Summary: A series of heterogeneous mesoporous catalysts with different acidity were successfully synthesized by in situ incorporation of aluminum in mesoporous silica channels, showing high catalytic activity and selectivity in oligomerization of 1-decene to polyalphaolefin. The catalyst exhibited excellent performance with high conversion and oligomer selectivity, and could be regenerated and maintain catalytic activity after cycles.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Applied
Yue Lou, Yuxiang Chen, Yang Zhao, Cheng Qian, Cheng Niu, Hao Jiang, Chuanlei Liu, Kongguo Wu, Benxian Shen, Jian Long, Yiming Wang, Hui Sun, Jigang Zhao, Jichang Liu, Hao Ling, Di Wu, Yujun Tong
Summary: This study highlights the crucial role of the compositions and structures of supports in the catalytic performance of Lewis acid catalysts. Experimental and computational analysis demonstrate that the NiO-Al2O3-SiO2 composite exhibits the best catalytic activity and stability as a support for AlCl3.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Energy & Fuels
Mingjie Liao, Xin Ning, Junwen Chen, Jiajun Zheng, Wenlin Li, Ruifeng Li
Summary: The synthesized mesoporous ZSM-5 zeolites showed better stability and higher initial activity in 1-hexene oligomerization compared to common ZSM-5 zeolite. The catalytic activity was closely related to the number and distribution of acid sites, with fewer and moderate strength of Bronsted acid sites inhibiting cracking and coke formation.
Article
Polymer Science
Ahad Hanifpour, Naeimeh Bahri-Laleh, Mehdi Nekoomanesh-Haghighi
Summary: The cooligomerization of 1-decene with 9-decene-1-ol using a Ti amine bis-phenolate catalyst resulted in the synthesis of a light-curable adhesive with high thermal stability and strong adhesion to various substrates.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Energy & Fuels
Leilei He, Shuo Su, Yi Zhao, Bing Xu, Jun Long
Summary: The active catalysts and product distribution of the BF3/n-C4H9OH-catalyzed 1-decene oligomerization reaction were investigated using molecular simulation. The results showed that (BF3)(2)center dot n-C4H9OH had higher catalytic activity compared to BF3 center dot n- C4H9OH, which was the most active substance in the catalyst system. The calculation results of reaction energy barriers and heats of reaction revealed the product distribution, with trimer, tetramer, pentamer, and dimer being the main oligomerization products. These results were consistent with the experimental findings.
CHINA PETROLEUM PROCESSING & PETROCHEMICAL TECHNOLOGY
(2023)
Article
Engineering, Chemical
Alexey A. Sadovnikov, Olga Arapova, Vincenzo Russo, Anton L. Maximov, Dmitry Yu Murzin, Evgeny R. Naranov
Summary: Tuning the morphology of heterogeneous catalysts is essential for the design of efficient processes. This study synthesized four micro-/mesoporous composites with different morphologies using a dual-templating method, and demonstrated that the catalyst nature has a significant impact on selectivity in solid-acid alkylation. The results also showed that the morphology of catalysts plays a crucial role in this process.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Kamila Pyra, Karolina A. Tarach, Kinga Gora-Marek
Summary: This study explored the production of high olefins yield from plastic waste without losing gasoline fraction, by comparing different properties of commercial FAU zeolites and mesoporous materials. A polypropylene (PP) cracking catalyst suitable for low-temperature operation was found. Advanced characterization techniques and analysis methods provided insights into the active species during cracking reaction and the nature of coke deposit formed after reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Energy & Fuels
Hong-Tao Liu, Jiu-Jiang Wang, Fang-Ming Xie, Yun-Chuang Li, Hai-Yan Li, Hai-Yan Liu, Yuan-Yuan Yue, Xiao-Tong Mi, Xiong-Hou Gao, Hong-Hai Liu
Summary: Well-ordered aluminosilicates (MAs) were prepared and applied in an industrial fluid catalytic cracking unit for the first time. The MAs showed increased surface area and improved catalytic cracking properties compared to the incumbent equilibrium catalyst. The industrial results demonstrated excellent hydrothermal stability and promising future use in industrial units.
Article
Polymer Science
Jing-jing Ruan, Han-dou Zheng, Yan Jiang, Li-bo Wang, Si-han Wang, Hai-yang Gao
Summary: The study investigated the activity of α-diimine nickel and palladium complexes in the oligomerization of decene mixture, with nickel-based catalyst showing better oligomerization activity. The resulting polyolefins had high branching degree and low molecular weight, with excellent lubricant properties.
ACTA POLYMERICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Dongyoon Woo, Minkyeong Ban, Jisung Lee, Cheol-Young Park, Jinuk Kim, Seongseop Kim, Jinwoo Lee
Summary: Anisotropic lens-shaped nitrogen-doped carbon material with unidirectionally aligned mesopores was successfully synthesized through perpendicular block copolymer self-assembly at the polymer interface. This novel material shows great potential as a potassium-ion battery anode material, making it a promising candidate for the next-generation battery systems.
CHEMICAL COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Kevin C. Courtney, Jason D. Vevea, Yueqi Li, Zhenyong Wu, Zhao Zhang, Edwin R. Chapman
Summary: Studies on Synaptotagmin 1 (syt1) have shown that it plays a crucial role in synaptic vesicle exocytosis, with its self-assembling multimers being enhanced by Ca2+ and dependent on anionic phospholipids. Additionally, the juxtamembrane linker of syt1 plays a key role in exocytosis by mediating multimerization.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Chemistry, Multidisciplinary
Florent Dubray, Vladimir Paunovic, Marco Ranocchiari, Jeroen A. van Bokhoven
Summary: This study investigates the oligomerization of pentene and hexene mixtures using an acidic mesoporous Al-SBA-15 catalyst. The results show that the catalyst exhibits high selectivity to jet-fuel range products (>98%) at low-to-moderate conversions (<50%). Higher conversions result in lower selectivities. It is also found that adjusting the conversion is the primary way to control the selectivity of the catalyst.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Applied
V. O. Samoilov, M. U. Sultanova, R. S. Borisov, A. A. Kozhevnikov, V. A. Lavrentyev, A. Sh. Utepbergenova, A. L. Maximov
Summary: A technological concept for producing a hydrocarbon LOHC prototype from LCO was proposed through experimental studies. The LCO was converted into an alkyldecalin fraction via a distillation-hydrogenation approach. The obtained LOHC showed the potential for hydrogen storage and release.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Organic
V. A. Yarchak, L. A. Kulikov, A. L. Maximov, E. A. Karakhanov
Summary: Porous aromatic framework PAF-30 was modified by introducing complexing groups to synthesize catalyst supports PAF-30-dpa-Mo, PAF-30-dpcl-Mo, and PAF-30-AA-Mo. Various analytical methods were used to characterize the materials, and the catalytic activity was tested in the epoxidation of cyclohexene, 1-hexene, 1-octene, and styrene. The reusability of the catalysts was assessed using cyclohexene epoxidation.
PETROLEUM CHEMISTRY
(2023)
Article
Engineering, Chemical
Zareta M. Matieva, Natalia Kolesnichenko, Yulia M. Snatenkova, Alexander A. Panin, Anton L. Maximov, A. V. Topchiev
Summary: This study demonstrated the direct conversion of CO2 to liquid hydrocarbons using a combination of CuZnAl/Al2O3 and Zn-HZSM-5 catalysts. The best performance was achieved with a CuZnAl-Al2O3/Zn-HZSM-5 physical mixture catalyst in a 1:1 weight ratio. Under specific experimental conditions, the CO2 conversion rate was 20%, with a selectivity of 47% for C5+ hydrocarbons (78% based on total hydrocarbons), and a selectivity of methane below 2%.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Review
Chemistry, Organic
M. V. Kulikova, A. Yu. Krylova, K. O. Krysanova, A. B. Kulikov, A. L. Maximov
Summary: Torrefaction and hydrothermal carbonization are low-temperature thermochemical procedures that convert biomass into biocoal, which is a carbon-neutral alternative to fossil coal. Biocoals have hydrophobic properties, increased energy density, and similar calorific value to brown coals compared to untreated biomass. The formation mechanisms of biocoal differ between the two processes due to the presence of a large amount of water in hydrothermal carbonization. This review focuses on papers discussing specific features of low-temperature heat treatment of biomass and the conversion trends of biomass structural components (cellulose, hemicellulose, lignin) during torrefaction and hydrothermal carbonization.
PETROLEUM CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
A. L. Maximov, A. V. Zolotukhina, E. R. Naranov
Summary: A water-soluble catalyst based on ruthenium(0) nanoparticles stabilized with a copolymer of β-cyclodextrin and epichlorohydrin was synthesized and characterized. The catalyst showed activity in the hydrogenation of aromatic and unsaturated compounds, phenols, levulinic acid and its esters. The activity of the catalyst depended on the polarity and size of the substrate, and the β-cyclodextrin moieties acted as protecting groups.
RUSSIAN CHEMICAL BULLETIN
(2023)
Article
Polymer Science
Maria Golubeva, Mariyam Mukhtarova, Alexey Sadovnikov, Anton Maximov
Summary: The annual production of plastic waste is a serious environmental problem, causing significant pollution. This paper proposes recycling polyethylene terephthalate waste bottles into benzene-toluene-xylene fraction using a nickel phosphide catalyst formed during the recycling process. The catalyst was characterized and shown to contain a Ni2P phase. Its activity was studied at various temperatures and pressures, with the highest selectivity at 93%.
Article
Biochemistry & Molecular Biology
Anton Lvovich Maximov, Mayya V. Kulikova, Alexey E. Kuz'min, Mikhail I. Ivantsov
Summary: This study investigated the homogeneous acetic acid synthesis-type Ru-Co-Li/N-methylpyrrolidone catalyst for CO and H-2 transformations at moderately high pressures. Different reaction conditions were examined and the selectivity of products such as acetic acid, methyl acetate, aldehydes, ethyl acetate, long-chain hydrocarbons, and alcohols were observed. The formation of different product groups and the influence of Ru-Co cluster size on hydrocarbon chain growth were discussed.
Article
Chemistry, Organic
I. G. Baigildin, E. A. Izergina, M. Yu. Talanova, E. A. Karakhanov, A. L. Maximov, A. V. Vutolkina
Summary: This study investigated the hydrogenation of aromatics using unsupported NiMoS catalysts synthesized in situ. The catalyst was found to be active for the hydrogenation reactions of naphthalene and its derivatives, and the reaction was influenced by temperature, pressure, reaction time, and water gas shift reaction conditions.
PETROLEUM CHEMISTRY
(2023)
Article
Chemistry, Organic
E. A. Roldugina, M. P. Boronoev, I. I. Shakirov, Yu. S. Kardasheva, S. V. Kardashev, A. L. Maximov, E. A. Karakhanov
Summary: The paper investigates the performance of ruthenium and nickel catalysts supported on aluminum-modified SBA-15 mesoporous silicate in aqueous-phase furfural hydrogenation. Increasing the reaction temperature and hydrogen pressure enhances the selectivity towards methyltetrahydrofuran. The ruthenium catalyst shows higher activity than the nickel catalyst under 250°C and 5 MPa H2 conditions.
PETROLEUM CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Maxim N. Temnikov, Ilya N. Krizhanovskiy, Anton A. Anisimov, Stanislav P. Bedenko, Konstantin I. Dementiev, Irina V. Krylova, Sergey A. Milenin, Anton L. Maksimov, Mikhail P. Egorov, Aziz M. Muzafarov
Summary: This review examines the current state of direct synthesis of alkoxysilanes (DSA), highlighting the main approaches, challenges, and prospects. The plausible reaction mechanism is considered, along with influential factors such as temperature, catalyst type and concentration, promoter additives, and method of carrying out the process. The bibliography includes 232 references.
RUSSIAN CHEMICAL REVIEWS
(2023)
Article
Chemistry, Organic
S. A. Svidersky, O. S. Dement'eva, M. I. Ivantsov, A. A. Grabchak, M. V. Kulikova, A. L. Maximov
Summary: The study investigates the hydrogenation of CO2 using catalysts supported on biochar. Bimetallic iron-cobalt catalysts were found to have better catalytic performance compared to monometallic iron and cobalt catalysts. The optimal performance was achieved with an iron to cobalt ratio of 3:1. The composition and genesis of the active phase in the bimetallic catalyst were identified, and a CO2 hydrogenation mechanism was proposed for the iron-dominated bimetallic catalyst. The use of biochar as a support was found to promote the formation of an active phase favorable for CO2 hydrogenation.
PETROLEUM CHEMISTRY
(2023)
Correction
Chemistry, Organic
V. A. Yarchak, L. A. Kulikov, A. L. Maximov, E. A. Karakhanov
PETROLEUM CHEMISTRY
(2023)
Article
Energy & Fuels
A. N. Karpov, V. V. Fadeev, K. B. Rudyak, A. L. Maksimov, A. V. Tarasov, E. V. Dutlov, P. S. Ivanov, D. V. Borisanov
Summary: This study demonstrates the relationship between mercaptan content in straight-run jet fuel and the operation conditions of column C-1 in the primary oil refining plant. Increasing the temperature at the bottom of column C-1 leads to the decomposition of unstable sulfur compounds, resulting in the removal of mercaptans and hydrogen sulfide with the gasoline fraction in column C-1. This reduces the mercaptan content in straight-run kerosene. A comparison of mercaptan contents in narrow oil fractions and straight-run jet fuel reveals that the latter has higher mercaptan content, which can originate from both the oil itself and the decomposition of unstable sulfur compounds, primarily disulfides.
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
(2023)
Review
Chemistry, Organic
N. N. Petrukhina, A. L. Maximov
Summary: The prospects of using DME for oil recovery are analyzed based on laboratory and mathematical modeling results. The mechanism and influential factors of DME injection for oil extraction and recovery are discussed. The benefits of injecting DME prior to hydrocarbon gases and carbon dioxide are revealed. Combined technologies involving DME, carbon dioxide, polymer solutions, and steam are analyzed for enhancing oil recovery. The possibility of using DME for oily sludge separation is briefly discussed.
PETROLEUM CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Vadim Samoilov, Vladimir Lavrentev, Madina Sultanova, Dzhamalutdin Ramazanov, Andrey Kozhevnikov, Georgiy Shandryuk, Mariia Kniazeva, Anton Maximov
Summary: The study investigates the potential use of lower alkyl ethers of glycerol as components for low-melting technical fluids. The aqueous solutions of glycerol ethers were found to have a wide temperature range of usability (-114 to 150 degrees C) and exhibited higher efficiency in low-temperature applications compared to glycerol- or propylene glycol-based fluids due to their lower viscosities and favorable environmental properties.
