Article
Chemistry, Analytical
M. Safa-Gamal, N. Asikin-Mijan, Mahashanon Arumugam, Wan Nor Adira Wan Khalit, I. Nur Azreena, Fatma S. Hafez, Y. H. Taufiq-Yap
Summary: Activated carbon-supported Co-Ag catalysts showed high deoxygenation efficiency and conversion of fatty acids to hydrocarbon liquid products, with a synergistic effect between the active metals and activated carbon support significantly facilitating the selective deoxygenation pathway.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2021)
Article
Chemistry, Multidisciplinary
Mahashanon Arumugam, Chee Keong Goh, Zulkarnain Zainal, Sugeng Triwahyono, Adam F. Lee, Karen Wilson, Yun Hin Taufiq-Yap
Summary: This study presents the synthesis and application of hierarchical HZSM-5 (h-HZSM-5) catalyst with mesoporous structure, which significantly increases the yield of diesel range hydrocarbons obtained from waste oil-derived fatty acid cracking. The introduction of mesopores through silanization treatment of pre-crystallized zeolite seeds improves the accessibility of acid sites within the hierarchical network, leading to enhanced catalytic performance.
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
Food Science & Technology
Ana Guimaraes, Armando Venancio
Summary: Fatty acids have antifungal abilities and can be used as antifungal agents, inhibiting the growth of fungi and the production of mycotoxins. Being natural and environmentally friendly compounds, fatty acids are also easily used as food additives, meeting consumer demands.
Article
Chemistry, Physical
Lei Liu, Yin-Qing Yao, Xiao-Chao Chen, Lin Guo, Yong Lu, Xiao-Li Zhao, Ye Liu
Summary: The hydrocarboxylation of terminal alkynes with formic acid was achieved using a multifunctional ligand modified Pd-catalyst. The multifunctional ligand played a crucial role in activating the substrates and ensuring high yields with regioselectivity.
JOURNAL OF CATALYSIS
(2022)
Review
Chemistry, Multidisciplinary
Ursula Biermann, Uwe T. Bornscheuer, Ivo Feussner, Michael A. R. Meier, Juergen O. Metzger
Summary: Oils and fats of vegetable and animal origin are important renewable feedstock for the chemical industry, with their industrial use increasing significantly in the past decade. Remarkable achievements in oleochemistry include reduction of fatty esters, selective oxidation of double bonds, synthesis of alkyl-branched compounds, and applications in the synthesis of polymeric materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
Andres Garcia-Viada, Celia Sanchez-Gonzalez, Mario Martinez-Mingo, Ines Alonso, Nuria Rodriguez, Juan C. Carretero
Summary: Here, a protocol for the selective delta-thiolation of aliphatic alpha-amino acids catalyzed by a Pd(II)/Ag(I) system is reported. This method utilizes disulfides as thiolating agents and N-COPy as a directing group, providing valuable non-proteinogenic amino acid derivatives with moderate to good diastereoselectivities and yields. Remarkably, this method is also applicable for the late-stage functionalization of a dipeptide. Experimental and DFT studies have shed light on the mechanism and factors controlling the selectivity of the process, highlighting the crucial role of the silver salt.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Applied
Santiago Arias, Juan Felipe Gonzalez, Lenivaldo Sousa, Celmy B. M. Barbosa, Antonio Osimar S. Silva, Roger Frety, Jose Geraldo A. Pacheco
Summary: Residual lipids with high fatty acid content can be converted into biodiesel via esterification and are a significant source of raw material for renewable biofuels. This study investigated the influence of Ni/Al ratio on the properties of unsupported mixed oxides as catalysts for the fast pyrolysis of myristic acid, showing that the catalyst with Ni/Al = 1 exhibited the best performance in terms of conversion rate, deoxygenation degree, and aromatic compound yield.
Article
Chemistry, Multidisciplinary
Ankit Agrawal, Neha Bansal, Himanshu Raghav, Arijit Jana, Reena Goyal, Debashish Ghosh, Thallada Bhaskar, Bipul Sarkar
Summary: The increasing demand for sustainable energy and chemicals, along with the declining fossil fuel reserves, has led to the search for alternative feedstocks and processes. Short-chain olefins are important for the polyolefin industry and require an alternative process to meet future demands. This study demonstrates that single-cell oil (SCO) derived from the oleaginous yeast Rhodotorula mucilaginosa IIPL32 could be used as a renewable feedstock for olefin production. A PtSn/alumina catalyst showed high selectivity to C2-C4 olefins, which can be attributed to the selective catalytic cracking of long-chain lipid molecules over nanosized PtSn/alumina and the synergy between surface acidic sites and reducible Pt species.
Article
Chemistry, Organic
Bo-Sheng Zhang, Sheng-Yan Zhao, Shun-Xi Li, Wan-Yuan Jia, Yu-Xi Yang, Yi-Ming Wang, Xue-Ya Gou, Yong-Min Liang, Xi-Cun Wang, Zheng-Jun Quan
Summary: This report presents a one-step synthesis of C4-aminated carbazoles and their derivatives through a series reaction of C-H amination and arylation. The substrate scope is wide, allowing for the synthesis of C4-amino carbazoles substituted by C2, C6, C7, and C8 methyl groups, as well as carbazole derivatives of fused rings, pyridine, and dibenzofuran.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Yunchong Zhang, Lv Chen, Yunyun Gui, Lijun Liu
Summary: The study utilized Pd nanoparticles anchored on layered Ti3C2 MXene for catalyzing the CTH of nitrobenzene, resulting in the production of active H* atoms while inhibiting the HER, outperforming most current catalysts.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Ruiping Wei, Lixiang Zhang, Mengyuan Tian, Zhaotian Cai, Zhenyu Shao, Lijing Gao, Jin Zhang, Xiaoxuan Guo, Guomin Xiao
Summary: The properties of the support have a significant impact on the catalytic performance of the supported catalyst. In this study, a series of NiMo bimetallic catalysts supported on niobium phosphate supports with different structures were prepared using the impregnation method. Various characterization techniques were employed to investigate the effects of the support's acidity and porosity on the dispersity and valence state of metal components, as well as the synergistic interaction between Ni and Mo. The catalytic performance of the catalysts was evaluated in the hydrodeoxygenation of oleic acid.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
James D. Kammert, Ashwin Chemburkar, Naomi Miyake, Matthew Neurock, Robert J. Davis
Summary: Different catalysts were investigated for the catalytic reduction of propionic acid to form propanal and propanol, revealing insights into the reaction mechanisms and the individual roles of Pd and Re. Experimental and theoretical results elucidated the reaction pathways and the interaction between Pd and ReOx, supporting the proposed mechanism.
Article
Chemistry, Physical
Qiang Deng, Jialuo Lu, Guan Sheng, Yong-Chao Zhang, Jun Wang, Zheling Zeng, Tatchamapan Yoskamtorn, Shik Chi Edman Tsang
Summary: This study demonstrates the ultraselective hydrodehydroxylation of C-OH groups and excellent catalytic performance in hydrogenative ring-opening reactions using partially sulfur-poisoned Pd catalysts. The elucidation of the catalytic mechanism reveals the heterolytic activation of H-2 on Pd-S and the promotion of bifunctional catalytic reactions.
Article
Chemistry, Physical
Kin Wai Cheah, Suzana Yusup, Adrian Chun Minh Loy, Bing Shen How, Vasiliki Skoulou, Martin J. Taylor
Summary: This review summarizes the research progress in the past decade on upgrading plant oils and fatty acids to diesel-like hydrocarbons using catalytic deoxygenation (CDO) technologies. It focuses on the fundamental chemistry, reaction mechanism, and kinetic modeling, and discusses the key process parameters that may affect the product yields/selectivity. The review also addresses the technical barriers, challenges, and prospects of CDO technologies.
MOLECULAR CATALYSIS
(2022)
Review
Chemistry, Physical
Paivi Maki-Arvela, Irina L. Simakova, Dmitry Yu. Murzin
Summary: This review summarizes recent studies on the synthesis of secondary amines by one-pot amination of aldehydes and ketones over heterogeneous catalysts. Amines are key intermediates in the chemical industry and are widely used for the synthesis of various commodities. The review discusses the direct catalytic reductive amination of carbonyl compounds, the synthesis of secondary amines from carbonyl compounds and in situ generated amines, and the application of alternative hydrogen sources. It also addresses the scope of the amination reaction, the effect of solvent, reaction conditions, and catalyst properties, as well as catalyst regeneration and reuse, kinetic regularities, and kinetic modeling.
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Andres F. Arroyo-Avirama, Sebastian Ormazabal-Latorre, Ramakrishna Jogi, Nicolas F. Gajardo-Parra, Cesar Pazo-Carballo, Moreno Ascani, Pasi Virtanen, Jose Matias Garrido, Christoph Held, Paivi Maki-Arvela, Roberto Canales
Summary: Bio-oil, derived from renewable sources, is a promising candidate to replace oil-derived products. This study investigates the extraction of guaiacol, an important lignin derivative, from alkanes using glycols and their eutectic mixtures. The results show that the eutectic mixtures have higher selectivity and larger miscibility gaps with the n-hexane phase than the studied glycols, making them more effective in extracting guaiacol.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Roman Barakov, Nataliya Shcherban, Paivi Maki-Arvela, Pavel Yaremov, Igor Bezverkhyy, Johan Warna, Dmitry Yu Murzin
Summary: In this study, hierarchical beta zeolites and micromesoporous materials were characterized and tested for a-pinene oxide isomerization. It was found that low crystalline micromesoporous materials favored the production of trans-carveol, while highly crystalline hierarchical beta zeolites favored the formation of campholenic aldehyde.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Atte Aho, Narendra Kumar, Kari Eranen, Paivi Maki-Arvela, Tapio Salmi, Markus Peurla, Ilari Angervo, Jukka Hietala, Dmitry Yu. Murzin
Summary: Methyl levulinate was selectively formed from glucose and methanol over a copper modified Beta zeolite bifunctional catalyst at 180 degrees C under argon atmosphere. The copper modification significantly changed the distribution of acid sites on the zeolite, leading to higher selectivity towards methyl levulinate. Metal modification of Beta zeolite with Sn and Zn did not perform as well as Cu in the formation of methyl levulinate during glucose transformation.
REACTION KINETICS MECHANISMS AND CATALYSIS
(2022)
Article
Chemistry, Physical
Somayeh Taghavi, Paivi Maki-Arvela, Zuzana Vajglova, Markus Peurla, Ilari Angervo, Kari Eranen, Elena Ghedini, Federica Menegazzo, Mojgan Zendehdel, Michela Signoretto, Dmitry Yu Murzin
Summary: Citronellal was converted to menthol using a Ni catalyst supported on H-Beta zeolite. The acidity and Ni loading of the catalyst significantly influenced the catalytic performance. The best results were obtained with a Ni loading of 15 wt.% on H-Beta-25, giving a yield of 36% menthols and 77% stereoselectivity. The catalyst could be successfully regenerated and reused with similar activity and selectivity.
Review
Chemistry, Physical
Paivi Maki-Arvela, Irina Simakova, Zuzana Vajglova, Dmitry Yu Murzin
Summary: This study summarized the one-pot synthesis of menthol from citronellal or citral, which can be conducted in both batch and continuous reactors. The reaction requires a bifunctional catalyst with Lewis acid sites for cyclisation of citronellal and metal particles for its hydrogenation. Different catalyst properties and reaction conditions can affect the yield and selectivity of the desired L-menthol. The study also investigated the performance of the catalyst in a trickle bed reactor and discussed the effect of metal location and synthesis method on catalyst performance.
CATALYSIS SURVEYS FROM ASIA
(2023)
Review
Chemistry, Physical
Paivi Maki-Arvela, Atte Aho, Irina Simakova, Dmitry Yu Murzin
Summary: Recent developments in the transformation of syngas to higher alcohols are critically summarized in this review. The production of jet fuel from alcohols has gained interest due to the urgent need for sustainable sources. Different pathways and catalysts are discussed, along with the challenges of increasing selectivity and suppressing the formation of unwanted byproducts.
Article
Engineering, Chemical
Irina L. Simakova, Paeivi Maeki-Arvela, Mark Martinez-Klimov, Joseph Muller, Zuzana Vajglova, Markus Peurla, Kari Eraenen, Dmitry Yu. Murzin
Summary: In this study, the one-pot synthesis of menthol from citral was investigated using different types of extrudates as catalysts. The catalyst consisting of Ni supported on H-Beta-38 and extruded with attapulgite showed the highest yield and excellent characteristics.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Applied
Atte Aho, Narendra Kumar, Kari Eranen, Robert Lassfolk, Paivi Maki-Arvela, Tapio Salmi, Markus Peurla, Ilari Angervo, Jukka Hietala, Dmitry Yu. Murzin
Summary: Sn-Al-Beta zeolite was prepared and modified with alkali and alkaline earth metals, which did not significantly change the properties of the catalyst. The catalysts were tested in the conversion of glucose to methyl lactate, and the results showed that suppressing Bronsted acidity can greatly increase the yield of methyl lactate.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Physical
Zuzana Vajglova, Bibesh Gauli, Paeivi Maeki-Arvela, Irina L. Simakova, Narendra Kumar, Kari Eraenen, Teija Tirri, Robert Lassfolk, Markus Peurla, Dmitry E. Doronkin, Dmitry Yu. Murzin
Summary: In this study, co-processing of n-hexadecane with lignin derived isoeugenol was investigated using low-cost mono- and bimetallic iron and nickel supported on H-Y-5.1 zeolite. Different Fe-Ni metal ratios in the catalyst led to different reaction rates and product distribution. Catalysts with smaller metal particle sizes were more efficient, and 2 wt% Fe - 8 wt% Ni/H-Y-5.1 catalysts exhibited extremely high activity in co-processing.
JOURNAL OF CATALYSIS
(2023)
Article
Nanoscience & Nanotechnology
Zuzana Vajglova, Bibesh Gauli, Paivi Maki-Arvela, Narendra Kumar, Kari Eranen, Johan Warna, Robert Lassfolk, Irina L. Simakova, Igor P. Prosvirin, Markus Peurla, Johan Kaarle Mikael Linden, Hannu Huhtinen, Petriina Paturi, Dmitry E. Doronkin, Dmitry Yu. Murzin
Summary: A set of low-cost monometallic Fe, Ni, and bimetallicFe-Ni bifunctional H-Y-5.1 catalysts with different metal ratios were synthesized and characterized. The introduction of Fe led to a decrease in strong acid sites and an increase in medium Bronsted acid sites, while the introduction of Ni increased the number of Lewis acid sites. The particle size of iron was approximately 5 nm, while it was about fourfold higher for nickel. XPS demonstrated higher iron content on the catalyst surface compared to nickel. The results also showed strong Fe-Ni nanoparticle interactions, which affected the catalytic performance.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Chemical
Johan Michelson, Paivi Maki-Arvela, Pasi Rajala, Markus Hallapuro, Daniel Schmid, Oskar Karlstrom, Johan Warna, Dmitry Yu Murzin
Summary: Experiments on CO2 capture using alkaline solutions showed that higher NaOH content and CO2 concentrations resulted in higher removal efficiency. A mathematical model accurately predicted CO2 uptake at high OH- concentrations, but had lower accuracy for CO2 uptake at lower OH- concentrations.
CHEMICAL ENGINEERING COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Alua M. M. Manabayeva, Paivi Maki-Arvela, Zuzana Vajglova, Mark Martinez-Klimov, Teija Tirri, Tolkyn S. S. Baizhumanova, Valentina P. P. Grigor'eva, Manapkhan Zhumabek, Yermek A. A. Aubakirov, Irina L. L. Simakova, Dmitry Yu. Murzin, Svetlana A. A. Tungatarova
Summary: In this study, the performance of monometallic Ni and bimetallic Ni-Fe catalysts, synthesized by solution combustion synthesis (SCS), in dry reforming of methane (DRM) was investigated. The bimetallic 15Ni-5Fe-30Al catalyst with NiAl2O4 spinel and metallic Ni phases exhibited the highest hydrogen yield of 81%, along with high conversion rates of CH4 and CO2.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Alua Manabayeva, Pa''ivi Maki-Arvela, Zuzana Vajglova, Mark Martinez-Klimov, Olha Yevdokimova, Anssi Peuronen, Mika Lastusaari, Teija Tirri, Kaisar Kassymkan, Tolkyn S. Baizhumanova, Manapkhan Zhumabek, Rabiga O. Sarsenova, Zauresh T. Zheksenbaeva, Gulnar N. Kaumenova, Vincenzo Russo, Dmitry Yu. Murzin, Svetlana A. Tungatarova
Summary: This study investigated the dry reforming of methane using Ni-M oxide catalysts prepared by solution combustion synthesis. The results showed that catalysts prepared by this method exhibited better catalytic activity and stability compared to those prepared by impregnation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Physical
Mark E. Martinez-Klimov, Olha Yevdokimova, Paivi Maki-Arvela, Jennifer Cueto, Nataliya Shcherban, Zuzana Vajglova, Kari Eranen, Dmitry Yu. Murzin
Summary: A series of extrudates composed of platinum, zeolite H-Beta-25 and Bindzil as a binder were evaluated for the hydrodeoxygenation of isoeugenol. The results showed that platinum distributed on both zeolite and binder exhibited higher conversion and yield. At 150 degree celsius, high activity and yield were achieved.
SUSTAINABLE ENERGY & FUELS
(2023)
