Article
Polymer Science
Ivan V. V. Nazarov, Danil P. P. Zarezin, Ivan A. A. Solomatov, Anastasya A. A. Danshina, Yulia V. V. Nelyubina, Igor R. R. Ilyasov, Maxim V. V. Bermeshev
Summary: This study successfully prepared a series of new optically active polymers by combining norbornene chemistry with chiral natural terpenes. These polymers exhibit high thermal stability and good film-forming properties, making them suitable for enantioselective membrane separation and chiral stationary phases for chromatography.
Review
Energy & Fuels
S. J. Suryawanshi, V. C. Shewale, R. S. Thakare, R. B. Yarasu
Summary: Biomass gasification is a promising method for energy generation, with huge potential due to the renewable nature of biomass. Different types of biomass feedstock materials can be tested and analyzed in downdraft gasifiers, with various parameters affecting the gasification process. This review paper focuses on the parametric study of different types of biomass feedstock materials used in downdraft gasifiers.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Thermodynamics
Guoqiang Wei, Lifang Deng, Haoran Yuan, Xixian Yang, Zhen Huang, Anqing Zheng, Li Xu
Summary: Under the background of fossil fuel consumption and global climate change, an enhanced chemical looping gasification of biomass coupled with CO2 splitting (CLGCS) was proposed using Fe-based mixed oxygen carriers (OCs). The experimental results showed that the NiO modified sample exhibited excellent reaction behavior in CLGCS.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
C. W. Forsberg, B. E. Dale, D. S. Jones, T. Hossain, A. R. C. Morais, L. M. Wendt
Summary: Biofuels can replace liquid fossil fuels in transportation and energy supply, while also reducing carbon dioxide emissions and improving soil fertility. Large-scale biorefineries and external low-carbon energy sources are crucial for the successful competition with fossil fuels.
Article
Chemistry, Multidisciplinary
Florian Lebendig, Michael Mueller
Summary: Biomass chemical looping gasification (BCLG) is a promising technology for carbon neutral liquid biofuel production, but ash-related issues need to be addressed. In this study, lab-scale investigations and thermodynamic calculations were conducted to understand the influence of biomass pre-treatment methods on the release of volatile inorganics and ash melting behavior. The results suggest that different pre-treatment technologies can improve and solve ash-related problems during thermochemical conversions.
Review
Engineering, Chemical
Jun Sheng Teh, Yew Heng Teoh, Heoy Geok How, Farooq Sher
Summary: An effective analytical technique is crucial for biomass utilisation in energy production. Various thermal conversion methods such as torrefaction, pyrolysis, combustion, hydrothermal liquefaction, and gasification have been widely used to improve biomass processing. Key parameters of biomass feedstock can be examined using GC and TG in combination with other analytical techniques to increase productivity of energy crops. Furthermore, optimal ratios for combining different biomass materials during co-pyrolysis and co-gasification can be determined for achieving the best synergetic relationship.
Article
Thermodynamics
Haochen Sun, Zhiqing Wang, Yitian Fang, Zheyu Liu, Libo Dong, Xing Zhou, Zhongliang Yu, Xiangyu Li, Jin Bai, Jiejie Huang
Summary: The study proposed a novel Fe-based CO2-gasification process for biomass, finding that CO2 has opposite effects on oxygen transfer capacity and carbon conversion rate, with an inflection point at around 20% concentration. Additionally, CO2 and oxygen carrier synergistically enhance tar cracking.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Yanchen Wu, Huazhong Fan, Siyi Shan, Siqi Wang, Zhongzheng Cai, Jian-Bo Zhu
Summary: Two bio-based seven-membered cyclic carbonate monomers M1 and M2 were successfully synthesized from myrcene, and polycarbonates were obtained through ring-opening polymerization using metal or organic catalysts. The functionalizable olefin moieties in the resulting polycarbonates allowed post-polymerization modifications via radical cross-linking and hydrogenation, leading to polymers with tunable thermal properties. Importantly, chemical recycling of P(M)s was achieved through monomer-polymer-dimer, providing a platform for the synthesis of chemically recyclable biobased polycarbonates.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2023)
Article
Chemistry, Multidisciplinary
Zhiwei Zhao, Zhongliao Wang, Jinfeng Zhang, Chunfeng Shao, Kai Dai, Ke Fan, Changhao Liang
Summary: In this study, an In-O-Cd bond-modulated S-scheme heterojunction of In2O3/CdSe-DETA was synthesized, which accelerated the photogenerated electron transfer. The oxygen vacancies (Vo) of In2O3 were found to have an electron capture effect. The synergistic effect of this structure extracted and rapidly transferred electrons to surface-active sites, improving the electronic coupling of CO2. This research provides new insights into photocatalytic CO2 reduction by precisely adjusting the electron transfer pathway and shortening the electron transfer distance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Gabriel Lopez, Dominik Keiner, Mahdi Fasihi, Tuomas Koiranen, Christian Breyer
Summary: The global chemical industry is poised to become the largest consumer of fossil fuels, posing challenges to defossilize its production. New green carbon feedstocks like electricity-based methanol and biomass-based methanol need to be developed. Increased plastic recycling can also reduce the demand for primary feedstock. The study suggests that an e-chemical transition pathway may be the most economically competitive route to defossilize the chemical industry.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Thermodynamics
Guoqiang Wei, Huan Zhou, Zhen Huang, Anqing Zheng, Kun Zhao, Yan Lin, Guozhang Chang, Zengli Zhao, Haibin Li, Yitian Fang
Summary: Hematite enhanced by CeO2 in chemical looping reforming (CLR) showed a promotion in oxygen mobility and creation of oxygen vacancies, contributing to high quality synthesis gas production and CO2 conversion into CO. Adjustment of reaction parameters can enhance CO productivity, and the mixed oxygen carrier maintained stability after 15 cycles of reaction.
Article
Chemistry, Analytical
L. L. Z. Cueva, G. J. Griffin, L. P. Ward, S. Madapusi, K. Shah, R. Parthasarathy
Summary: This study investigates the pre-treatment of rice straw with chemical additives for biochar production. The optimized conditions result in increased biochar yield, higher heating value, and lower ash content.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Green & Sustainable Science & Technology
Touhidur Rahaman, Subhadeep Biswas, Shubhankar Ghorai, Sudeshna Bera, Sonali Dey, Suman Guha, Debabrata Maity, Sukanta De, Jhuma Ganguly, Malay Das
Summary: The study systematically assessed the lignocellulosic biomass of six grass species and found that Saccharum spontaneum and Arundo donax have high potential for bioethanol production, while Sorghum bicolor and Coix lacryma-jobi have lower lignin content and higher glucose yield.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Green & Sustainable Science & Technology
Emanuele Moioli, Tilman Schildhauer
Summary: This review presents the available technologies for the flexible utilization of biomass and explores the potential of coupling bioenergy production with the electrical grid to convert excess electricity into storable chemical molecules. The flexible use of biomass can be an essential part of future CO2-free energy systems, providing year-round energy carriers and carbon-neutral carbon for synthetic fuel production.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Biotechnology & Applied Microbiology
B. B. Cardias, M. Barcelo-Villalobos, T. Lafarga, F. G. Acien Fernandez, M. G. Morais, J. A. V. Costa
Summary: This study evaluated the CO2 demand of microalgae cultures in raceways throughout the year under different environmental conditions. The results showed that CO2 demand depends on biomass productivity, which is influenced by light availability and temperature. The research highlights the importance of optimizing CO2 supply in raceways to minimize biomass production costs.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Chemistry, Multidisciplinary
Marie Kobylarski, Jean-Claude Berthet, Thibault Cantat
Summary: Homogeneous reductive depolymerization of polyesters and polycarbonates with hydroboranes can be achieved using f-metal complex catalysts, resulting in the transformation of these polymeric materials into valuable alcohol compounds with high selectivity.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Gabriel Durin, Jean-Claude Berthet, Emmanuel Nicolas, Pierre Thuery, Thibault Cantat
Summary: This study reports the catalytic hydrogenolysis of R3SiOTf species to R3SiH in the presence of a base using hydride complexes. The mechanisms of these reactions were examined using DFT studies, revealing different active species for the reduction of Si-OTf and Si-Cl bonds.
Article
Chemistry, Physical
Caroline Genre, Idir Benaissa, Timothe Godou, Mathieu Pinault, Thibault Cantat
Summary: Formic acid is used as the only source of carbon and hydrogen in the methylation of aromatic and aliphatic amines to methylamines. The reaction proceeds over a solid Pd/In2O3 catalyst via a formylation/transfer hydrogenation pathway without the need for any additive.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Gabriel Durin, Albane Fontaine, Jean-Claude Berthet, Emmanuel Nicolas, Pierre Thuery, Thibault Cantat
Summary: The metal-free catalytic hydrogenolysis of silyl triflates and halides to hydrosilanes is achieved using arylborane Lewis acids as catalysts. The catalyst acts as a Frustrated Lewis Pair and is able to split H-2 and generate a boron hydride intermediate capable of reducing (pseudo)halosilanes. This metal-free organocatalytic system competes with metal-based catalysts and enables the formation of a variety of hydrosilanes at room temperature in high yields under low hydrogen pressure.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Liam J. Donnelly, Jean-Claude Berthet, Thibault Cantat
Summary: This study describes a zirconium-catalyzed synthesis of imines through the reductive deoxygenation of secondary amides, achieving high yields and excellent chemoselectivity. The reaction utilizes Schwartz's reagent and (EtO)(3)SiH as a mild stoichiometric reductant, with stoichiometric mechanistic investigations suggesting the regeneration of the active catalyst through the metathesis of Si-H and Zr-OR sigma-bonds.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Etienne Crochet, Lucile Anthore-Dalion, Thibault Cantat
Summary: Investigation was conducted on the reactivity of alkyl formates as novel transfer hydroalkylation reagents in the transfer hydroalkylation of imines. By using a ruthenium-based catalyst and LiI as promoter to cleave the C-O sigma-bond of the formate scaffold, tertiary amines were produced with divergent regioselectivity compared to previously reported strategies.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Baptiste Neil, Lamine Saadi, Louis Fensterbank, Clement Chauvier
Summary: Benzylsilanes are widely used as stable synthetic intermediates in organic synthesis, but are mainly produced by stoichiometric procedures. Catalytic alternatives for silylation of benzylic C(sp(3))-H bonds are scarce due to the need for specialized directing groups and catalytic systems to compete with the kinetically-favored silylation of C(sp(2))-H bonds. In this study, we report the first general and catalytic-in-metal undirected silylation of benzylic C(sp(3))-H bonds under ambient, transition metal-free conditions using stable tert-butyl-substituted silyldiazenes (tBu-N=N-SiR3) as silicon source. The high activity and selectivity of the catalytic system is attributed to the facile generation of organopotassium reagents, including tert-butylpotassium.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Marie-Helene Pietraru, Nicolas Lentz, Louise Ponsard, Emmanuel Nicolas, Thibault Cantat
Summary: In order to reduce our reliance on fossil feedstock, alternative sources for polymeric materials have been sought in recent years. This study presents a new approach to the formation of a useful monomer for polyesters, succinic anhydride, through the catalytic carbonylation of bio-sourced acrylic acid. The use of an Earth-abundant metal catalyst, [Co-2(CO)(8)], along with a bidentate ligand, 1,2-bis(dicyclohexylphosphino)ethane (dcpe), and H-2, successfully tackles the challenging carbonylation of unsaturated carboxylic acids.
Article
Chemistry, Physical
Alexandre Porcheron, Omar Sadek, Salem Ba Sowid, Nathalie Bridonneau, Laura Hippolyte, Dimitri Mercier, Philippe Marcus, Lukmonjon Mutalliev, Clement Chauvier, Corinne Chaneac, Louis Fensterbank, Francois Ribot
Summary: Significant progress has been made in stabilizing and functionalizing gold nanoparticles (AuNPs) using thiols and imidazolylidene N-heterocyclic carbene-capping ligands. This study introduces mesoionic carbene (MIC) ligands based on the 1,2,3-triazol-5-ylidene scaffold, which enables the efficient preparation of highly stable AuNPs through a simple one-pot protocol. The size of the AuNPs can be controlled by adjusting the Au/ligand ratio and the nature of the triazolium salts, facilitated by the easy synthesis of MIC precursors through click chemistry. Characterization using C-13 solid-state NMR and X-ray photoelectron spectroscopy confirms the presence of MICs exclusively on the surface of Au(0) nanoparticles.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xin Liu, Marie Kobylarski, Jean-Claude Berthet, Thibault Cantat
Summary: This study reports the catalyst-free depolymerization of polycaprolactone with iodosilanes, leading to the formation of valuable functionalized monomer derivatives.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xin Liu, Marie Kobylarski, Jean-Claude Berthet, Thibault Cantat
Summary: Catalyst-free depolymerization of polycaprolactone with iodosilanes (Me3SiI and SiH2I2) can generate valuable functionalized monomer derivatives.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Alexia Ohleier, Antoine Sallustrau, Bouchaib Mouhsine, Fabien Caille, Davide Audisio, Thibault Cantat
Summary: This study reports a method for synthesizing high-value building blocks from carbon dioxide. By using a new nucleophilic labeled source, methoxyborane, a catalytic methoxylation reaction on aryl halides can be achieved directly, leading to the successful labeling of a series of substrates.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Marie Kobylarski, Liam J. Donnelly, Jean-Claude Berthet, Thibault Cantat
Summary: Cp2Zr(H)Cl has been used as a stoichiometric reagent for the reduction of unsaturated organic molecules. Recently, it has been developed as a catalyst by turnover of the [Zr]-X intermediates formed upon reaction with an organic substrate, using hydride reagents. In this study, a new catalytic pathway for the reduction of esters using Cp2Zr(H)Cl as the catalyst and a bench-stable silane, Me(OMe)(2)SiH (DMMS), as a mild stoichiometric reductant is reported. The methodology showed high yields of alcohols and proved effective for the depolymerisation of polyesters found in household plastic waste.
Article
Chemistry, Multidisciplinary
R. Martin Romero, Neethu Thyagarajan, Nora Hellou, Clement Chauvier, Timothe Godou, Lucile Anthore-Dalion, Thibault Cantat
Summary: This article presents a transfer hydrosilylation of ketones using silyl formates as hydrosilane surrogates under mild conditions. A total of 24 examples of ketones were successfully converted to their corresponding silyl ethers with yields ranging from 61% to 99% in the presence of a (PNP)-P-H-based ruthenium catalyst and silyl formate reagent. The crucial role of the ligand in the transformation was demonstrated.
CHEMICAL COMMUNICATIONS
(2022)
