Article
Energy & Fuels
Kristaps Malins
Summary: Screening tests were carried out on various monometallic and bimetallic catalysts synthesized by different impregnation methods to evaluate their performance and selectivity for hydrocarbon production from vegetable oil feedstock with high FFA content. Among them, the Mo-promoted Ni17Mo3DP catalyst exhibited great performance and selectivity, achieving a higher hydrocarbon yield and demonstrating potential for producing renewable hydrocarbons from fatty acid containing raw materials.
Article
Energy & Fuels
E. N. Vlasova, A. A. Porsin, P. Aleksandrov, A. L. Nuzhdin, G. A. Bukhtiyarova
Summary: The co-hydroprocessing of SRGO and RSO mixture over the stacked bed sulfide catalytic system showed that temperature and pressure had a significant impact on product quality and n-C18H38 conversion. Increasing temperature from 350°C to 380°C led to a decrease in cloud point due to higher n-C18H38 conversion, while increasing pressure from 4.0 MPa to 7.0 MPa decreased n-C18H38 conversion. The presence of NH3 was found to inhibit hydrocracking/hydroisomerization reactions in the co-processing of RSO-SRGO mixtures.
Article
Nanoscience & Nanotechnology
Azina Rahmani, Maksim A. Sultanov, Kemah Kamiru-White, Lorianne R. Shultz-Johnson, Brian E. Butkus, Shaohua Xie, Fudong Liu, Diep T. H. Nguyen, Noeimie Wilson-Faubert, Ali Nazemi, Parag Banerjee, Lei Zhai, Massimiliano Delferro, Jianguo Wen, Titel Jurca
Summary: Galvanic exchange and atomic layer deposition techniques were used to prepare ultralow loading Pt catalysts with high stability and recyclability. The catalysts showed high activity towards various functionalized styrenes and excellent tolerance towards substituents.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Energy & Fuels
A. Iusovskii, R. Boldushevskii, A. Mozhaev, O. Shmelkova, A. Guseva, E. Chernysheva, V Kapustin, I Pronchenkov, P. Nikulshin
Summary: This study synthesized and studied NiMo/Al2O3 catalysts with different surface loading of molybdenum for secondary middle distillates hydrodearomatization. The results showed that increasing the molybdenum load decreased the dispersion of the active phase particles and significantly changed the catalytic properties. The hydrogenation and hydrodesulfurization rates decreased with the increase of the mass fraction of active metals. The catalyst with a Mo loading of 4.4 at/nm demonstrated the highest specific depth of hydrogenation.
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
(2022)
Article
Chemistry, Physical
Paola Riani, Ioannis Valsamakis, Tullio Cavattoni, Vicente Sanchez Escribano, Guido Busca, Gabriella Garbarino
Summary: Ni-based catalysts with enhanced thermal stability and catalytic performance for CO2 methanation have been synthesized, and it was found that La2O3 plays a promoting role in the reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Qi Zhao, Wenhao Yang, Jingjie Luo, Changhai Liang
Summary: Understanding the roles of adiponitrile hydrogenation is crucial in designing nickel catalysts. Different Ni/Al2O3 catalysts were synthesized and characterized, showing that the use of different precipitators can modulate the catalyst's chemical structure and performance, ultimately affecting the selectivity and yield of adiponitrile hydrogenation.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zexu Fang, Ying Gu, Xinran Dong, Gen Zhang, Lin Li, Xiaoguang Zhou, Chungui Tian
Summary: This study reports the design of two-dimensional porous Ni-Ni3N-NiMoN heterojunction sheets for efficient catalytic hydrogenation of aromatic nitro-compounds. The heterojunction interfaces provide plentiful active sites to improve the catalyst's ability in activating the reactants. The 2D porous structure facilitates contact with reactants, mass transfer, and diffusion, which accelerates the hydrogenation process.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Kun Sun, Ge Yang, Jiaxin Han, Yongming Chai, Yanpeng Li, Chunzheng Wang, Svetlana Mintova, Chenguang Liu, Hailing Guo
Summary: A composite catalyst consisting of sulfur-tolerant Ni/Al2O3@SOD and MoS2/Al2O3 was developed for the hydrodesulfurization of dibenzothiophene. The catalyst showed high catalytic activity and selectivity, making it a promising option for desulfurization applications.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Energy & Fuels
Kaixuan Yang, Yueyue Li, Ruonan Wang, Qing Li, Bowen Huang, Xiaoling Guo, Zhiguo Zhu, Ting Su, Hongying Lue
Summary: A NiIn0.2/MgO-Al2O3 catalyst was successfully prepared for efficient hydrogenation of furfural to furfuryl alcohol, showing excellent catalytic performance and stability in other unsaturated aldehydes reactions. The metal-IMCs dual-active-sites mechanism provides an effective strategy for synthesizing efficient hydrogenation catalysts.
Article
Chemistry, Physical
Lei Zhao, Caiyun Wang, Jixiang Chen, Ziyang Nie, Jiyan Zhang, Xuebin Lu
Summary: A series of highly active Ni/Al2O3, Ni/K2O-Al2O3, and Ni/La2O3-K2O-Al2O3 catalysts were successfully synthesized for the partial hydrogenation of adiponitrile to 6-aminocapronitrile. The addition of potassium oxide and lanthana significantly enhanced the catalytic activity. The physicochemical properties of the catalysts were characterized using various techniques, and it was found that the addition of La2O3 resulted in Ni-0 particles with higher dispersion. Compared to the Ni/Al2O3 catalyst, the Ni/La2O3-K2O-Al2O3 catalyst with an appropriate amount of promoter exhibited higher catalyst surface alkalescence, enhanced electronic density and dispersion of nickel, and showed higher activity and selectivity towards 6-aminocapronitrile during the hydrogenation of adiponitrile in the absence of ammonia, indicating that K2O and La2O3 improved the performance of the nickel-based catalyst.
Article
Chemistry, Multidisciplinary
Zhuang Ma, Vishwas G. Chandrashekhar, Bei Zhou, Asma M. Alenad, Nils Rockstroh, Stephan Bartling, Matthias Beller, Rajenahally Jagadeesh
Summary: Silica supported ultrasmall Ni-nanoparticles can efficiently convert nitriles to primary amines under mild conditions, offering broad applicability and good stability.
Article
Chemistry, Multidisciplinary
Yang Jiang, Qian Li, Xi Li, Xinyi Wang, Sen Dong, Jianhua Li, Li Hou, Tifeng Jiao, Yatao Wang, Faming Gao
Summary: This study successfully prepared three-dimensional network Pd-Ni bimetallic catalysts, which exhibited high conversion rate and selectivity for the hydrogenation of nitrobenzene at low temperature and normal pressure. The catalysts showed significant catalytic efficiency and recyclability even after 10 cycles, providing important theoretical basis and technical support for the preparation of low-cost, highly efficient catalysts.
Article
Chemistry, Multidisciplinary
Ryan M. Claydon, Luis A. Roman-Ramirez, Joseph Wood
Summary: The study shows that the Mo-MMO catalyst exhibits comparable reaction rates to Pd-2%/Al2O3 catalyst and significant advantage in cis-decalin production, offering the opportunity for generating more alkyl naphthenes in subsequent hydrodecyclization reactions. On the other hand, Pd catalysts supported on Al2O3 tend to preferentially produce trans-decalin due to the electronic properties of Pd catalysts influencing octalin intermediate orientations on the catalyst surface.
Article
Chemistry, Multidisciplinary
Wenlong Mo, Xingxiang Wang, Meng Zou, Xianjin Huang, Fengyun Ma, Jianzhang Zhao, Tiansheng Zhao
Summary: Three Ni-Al2O3 catalysts were prepared using a mechanochemical method, with Ni(NO3)(2)center dot 6H(2)O as the precursor showing good Ni dispersibility and a small Ni grain size. Among the three catalysts, Ni-NO showed higher resistance to carbon deposition, leading to higher CO conversion and yield.
Article
Chemistry, Physical
Sabrina Maria Gericke, Jenny Rissler, Marie Bermeo, Harald Wallander, Hanna Karlsson, Linnea Kollberg, Mattia Scardamaglia, Robert Temperton, Suyun Zhu, Kajsa G. V. Sigfridsson Clauss, Christian Hulteberg, Andrey Shavorskiy, Lindsay Richard Merte, Maria Elise Messing, Johan Zetterberg, Sara Blomberg
Summary: Nickel-promoted molybdenum-based catalysts undergo oxidation-reduction reactions under high-pressure H-2 and elevated temperatures. The mixing of nickel and molybdenum lowers the reduction temperature of the oxide. The reduction process of the supported catalysts is more gradual compared to foils, indicating a strong interaction between the catalyst and the alumina support.
Article
Chemistry, Physical
Arina R. Potylitsyna, Yuliya V. Rudneva, Yury I. Bauman, Pavel E. Plyusnin, Vladimir O. Stoyanovskii, Evgeny Y. Gerasimov, Aleksey A. Vedyagin, Yury V. Shubin, Ilya V. Mishakov
Summary: The catalytic utilization of chlorine-organic wastes is important for ecological reasons. This study focused on the catalytic decomposition of trichloroethylene over 100Ni and 96Ni-4W catalysts, resulting in the formation of carbon nanofibers. The optimal activity of the catalysts was observed at specific temperature ranges, and the 96Ni-4W catalyst showed better longevity compared to pure Ni catalyst.
Article
Chemistry, Physical
Lyubov Isupova, Evgeny Gerasimov, Igor Prosvirin, Vladimir Rogov
Summary: LaFe0.4Ni0.6O3/CeO2 (1:1) two-phase composite materials were prepared by mechanochemical and Pechini routes. The catalytic properties of the composites in methane and CO oxidation reactions strongly depend on their preparation conditions. In low-temperature catalytic CO oxidation, the composites demonstrate higher activity compared with LaFe0.4Ni0.6O3 perovskite, with the highest activity observed for the composite prepared by mechanical treatment of perovskite and fluorite precursors. In high-temperature catalytic methane oxidation, the activity correlates with the reducibility of the samples, with the highest activity observed for the composite prepared by the one-pot Pechini route with higher reducibility up to 600 degrees C.
Article
Chemistry, Physical
Daria V. V. Yurpalova, Tatyana N. N. Afonasenko, Igor P. P. Prosvirin, Andrey V. V. Bukhtiyarov, Maxim A. A. Panafidin, Zakhar S. S. Vinokurov, Mikhail V. V. Trenikhin, Evgeny Yu. Gerasimov, Tatyana I. I. Gulyaeva, Larisa M. M. Kovtunova, Dmitry A. A. Shlyapin
Summary: Novel bimetallic Pd-Co catalysts supported on Sibunit carbon material were synthesized and used for selective acetylene hydrogenation to produce ethylene. Increasing the Pd:Co molar ratio from 1:0 to 1:2 in 0.5%Pd-Co/C catalysts, treated at 500 degrees C under hydrogen, led to an increase in ethylene selectivity from 60 to 67% (T = 45 degrees C). The catalysts were characterized using various methods and it was found that the optimal catalytic properties were observed in catalysts with a Pd:Co molar ratio of 1:2-1:4.
Article
Chemistry, Inorganic & Nuclear
Ksenia A. Nadeina, Sergey V. Budukva, Yuliya V. Vatutina, Polina P. Mukhacheva, Evgeniy Yu. Gerasimov, Vera P. Pakharukova, Igor P. Prosvirin, Tatyana V. Larina, Oleg V. Klimov, Aleksandr S. Noskov, Victor V. Atuchin
Summary: Among the known synthesis procedures and reagents for unsupported Ni-Mo-W catalysts, there is no consensus about optimal preparation conditions. In this study, Ni-Mo-W precursors were prepared via three different techniques and characterized. The catalytic activity was found to be significantly higher when all active metals are available in a mixed phase. The catalyst prepared by the spray drying method showed the highest activity.
Article
Chemistry, Inorganic & Nuclear
Pavel V. Markov, Galina O. Bragina, Nadezhda S. Smirnova, Galina N. Baeva, Igor S. Mashkovsky, Evgeny Y. Gerasimov, Andrey V. Bukhtiyarov, Yan. V. Zubavichus, Alexander Y. Stakheev
Summary: The effect of support on the performance of Pd1Ag10/Al2O3 and Pd1Ag10/CeO2-ZrO2 catalysts in the selective hydrogenation of diphenylacetylene (DPA) was investigated. The use of CeO2-ZrO2 as a carrier increased the activity of the Pd1Ag10 catalyst by three times without sacrificing selectivity compared to Pd1Ag10/Al2O3. The high selectivity of Pd1Ag10/CeO2-ZrO2 can be attributed to the stability of the structure of isolated Pd-1 sites on the surface of SAA Pd1Ag10/CeO2-ZrO2.
Article
Chemistry, Inorganic & Nuclear
Maxim D. Mikhnenko, Svetlana V. Cherepanova, Evgeny Yu Gerasimov, Alena A. Pochtar, Maria V. Alekseeva (Bykova), Roman G. Kukushkin, Vadim A. Yakovlev, Olga A. Bulavchenko
Summary: The structural features of NiO-SiO2 nanocrystalline catalyst synthesized by sol-gel method were investigated. XRD, TEM, and DD were used to study the structure. XRD simulations based on conventional Rietveld analysis and statistical models of 1D disordered crystals were conducted to extract structural information. The results showed the presence of two NiO-like oxides with different lattice constants and different average sizes in NiO-SiO2 catalyst.
Article
Energy & Fuels
O. V. Klimov, K. A. Nadeina, O. V. Potapenko, Yu. V. Vatutina, A. V. Saiko, V. A. Koveza, P. P. Mukhacheva, V. S. Krestyaninova, A. S. Yurtaeva, T. S. Bogomolova, A. A. Salomatina, E. Yu. Gerasimov, I. P. Prosvirin, A. S. Noskov
Summary: This study focuses on the refining of thermolysis oil containing 2.24% chlorine. Hydrotreating of the mixture of thermolysis oil and SR VGO with NiMo supported catalysts was conducted, followed by FCC treatment. The results showed that the optimal hydrotreating temperature was 360℃, and the best catalyst used was NiMoP/Al2O3.
Article
Chemistry, Physical
Aleksey N. Chernov, Svetlana V. Cherepanova, Evgeny Yu. Gerasimov, Igor P. Prosvirin, Galina A. Zenkovets, Alexei A. Shutilov, Anna S. Gorbunova, Konstantin Yu. Koltunov, Vladimir I. Sobolev
Summary: Non-oxidative propane dehydrogenation (PDH) is an important method for propylene production. Recent studies have shown that cobalt-containing catalysts have great potential in this process and can achieve efficiencies comparable to platinum- and chromium-based catalytic systems. This study investigated the active sites of cobalt aluminates (CoAl2O4-Al2O3) responsible for PDH and found that cobalt oxide forms tightly covering alumina or embedded in the spinel structure are the most likely catalytic sites for this reaction. Further research is needed to understand the role of surface oxygen vacancies in enhancing the catalytic activity.
Article
Chemistry, Multidisciplinary
Angelina V. V. Zhurenok, Danila B. B. Vasichenko, Semen N. N. Berdyugin, Evgeny Yu. Gerasimov, Andrey A. A. Saraev, Svetlana V. V. Cherepanova, Ekaterina A. A. Kozlova
Summary: Photocatalysts based on graphite-like carbon nitride with a low content of noble metals (Pd, Rh) were proposed for hydrogen evolution under visible light. Reduction of precursor complexes [Rh-2(H2O)(8)(& mu;-OH)(2)](NO3)(4)& BULL;4H(2)O and (Et4N)(2)[Pd(NO3)(4)] at 400 & DEG;C gave metallic particles. The synthesized photocatalysts were characterized and tested for hydrogen evolution, showing high activity for the 0.01-0.5% Rh/g-C3N4 series and the most efficient use of metal particles in the 0.1% Rh/g-C3N4 photocatalyst.
Article
Chemistry, Multidisciplinary
Anna Yu. Kurenkova, Andrey A. Saraev, Denis D. Mishchenko, Evgeny Yu. Gerasimov, Ekaterina A. Kozlova
Summary: In this study, graphitic carbon nitride g-C3N4 was modified using platinum and platinum oxide as catalysts for photocatalytic hydrogen production under visible light irradiation. The results showed that an optimal amount of platinum catalyst significantly enhanced the rate of hydrogen evolution and selectivity, while an excess of platinum led to an increase in the formation of by-products and a decrease in selectivity.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
E. A. Avdeenko, K. A. Nadeina, O. V. Klimov, T. V. Larina, E. Yu. Gerasimov, I. S. Golubev, A. S. Noskov
Summary: The influence of different alumina precursors (pseudoboehmites) on the catalytic activity of CoMo/ASA + Al2O3 catalysts in FCC gasoline hydrotreating has been studied. The choice of pseudoboehmite significantly affects the properties of the supports and catalysts, including texture, acidity, mechanical properties, and dispersion of the active phase. The type of pseudoboehmite also affects the amount of tetrahedral cobalt in the catalysts, thereby influencing the surface activity. Additionally, a linear relationship is found between the ratio of medium and weak acid sites and catalyst selectivity.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Marat R. Agliullin, Sergei S. Arzumanov, Evgeny Yu. Gerasimov, Nellya G. Grigorieva, Vera R. Bikbaeva, Dmitry V. Serebrennikov, Leonard M. Khalilov, Boris I. Kutepov
Summary: Using multiple techniques including XRD, Al-27 and P-31 MAS NMR, Raman spectroscopy, SEM, TEM, N-2 adsorption-desorption, and IR spectroscopy, the influence of aluminum source and gel aging temperature on the properties of intermediate phases and subsequent crystallization products in SAPO-11 molecular sieves was studied. It was found that by manipulating the aluminum source and gel aging temperature, various intermediate silicoaluminophosphates can be synthesized, and the morphology and size of the resulting crystals in the SAPO-11 molecular sieves can be controlled. The synthesized SAPO-11 nanoscale sample exhibited high stability and selectivity in the vapor-phase isomerization reaction of cyclohexanone oxime to caprolactam.
Article
Chemistry, Inorganic & Nuclear
Long M. Bui, Son T. Cam, Ivan V. Buryanenko, Valentin G. Semenov, Denis V. Nazarov, Pavel E. Kazin, Vladimir N. Nevedomskiy, Evgeny Y. Gerasimov, Vadim I. Popkov
Summary: A novel ultra-high-entropy rare earth orthoferrite (UHE REO) with high chemical and phase purity was successfully synthesized via a simple and efficient solution combustion approach. The presence of main and minor fractions of UHE REO nanoparticles with different sizes was confirmed by SEM and TEM. The unique magnetic behavior of the nanostructured UHE REO suggests its potential applications in various electronic devices.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Vasily V. Kaichev, Andrey A. Saraev, Aleksandr V. Fedorov, Evgeny Yu. Gerasimov, Bo Weng
Summary: It was found that Pd nanoparticles with smaller particle sizes showed higher activity in the low-temperature oxidation of CO. In contrast, larger Pd nanoparticles were stable and consisted mainly of metallic palladium, resulting in lower activity. The difference in activity is attributed to the oxidation of small Pd nanoparticles and the change in chemical composition, leading to a change in the reaction mechanism.
Article
Chemistry, Physical
Svetlana V. Cherepanova, Egor G. Koemets, Evgeny Yu. Gerasimov, Irina I. Simentsova, Olga A. Bulavchenko
Summary: The reduction and structural changes of Co-based oxides doped with Al3+ ions were studied using in situ XRD and TPR techniques. It was found that Al3+ cations dissolved in the Co3O4 lattice and their distribution depended on the calcination temperature. The reduction process and phase transformation were affected by the distribution of Al in the mixed oxides.