Article
Nanoscience & Nanotechnology
Xiangyang Ji, Yue Ma, Xiao Sun, Shaojia Song, Kun Yang, Weixin Huang, Chunming Xu, Bohan Feng, Jian Liu, Weiyu Song
Summary: In this work, an efficient photothermal synergy approach for promoting propane dehydrogenation was described. It was found that V/TiO2 nanoscale catalysts could achieve a 9.2% increase in propylene production rate under UV-vis light radiation. The enhanced acidity of the V/TiO2 catalysts induced by the photothermal synergy effect was shown to promote propane activation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Applied
Jiachen Sun, Sai Chen, Donglong Fu, Wei Wang, Xianhui Wang, Guodong Sun, Chunlei Pei, Zhi-Jian Zhao, Jinlong Gong
Summary: This paper presents an experimental study on the effect of bulk oxygen transfer and surface reaction in Ce1-xZrxO2 supported VOx redox catalysts for the chemical looping oxidative propane dehydrogenation reaction. The results show that the reaction performance of the redox catalyst is influenced by the introduction of Zr, which modulates the bulk oxygen transfer and surface reaction. Kinetic study reveals that the H-abstraction step in the surface reaction determines the instantaneous reduction rate of the redox catalyst.
CHINESE JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Applied
Peng Bai, Miaomiao Yang, Xuejiao Chen, Yonghui Liu, Wei Yang, Lianming Zhao, Pingping Wu, Chunzheng Wang, Svetlana Mintova, Zifeng Yan
Summary: In this study, the VOX/Al2O3 catalyst was modified by boric acid, which significantly improved its stability and reduced coke deposition. The boron decreased the polymerization degree of VOX species, generating a high proportion of isolated vanadium species, thereby enhancing the stability of the catalyst. Boron interacted with Al and V, reducing the amounts of acid sites and alleviating coke deposition rate. The presence of boron promoted the desorption of propylene, improving the selectivity and stability of the catalyst.
Article
Energy & Fuels
Huanling Zhang, Huixia Ma, Feng Zhou, Xiaolin Zhu, Guowei Wang, Chunyi Li
Summary: The study demonstrates that using ZSM-5 as a carrier of the Sn-based catalyst leads to high conversion of propane but poor selectivity. The addition of Sn species on the external and internal surfaces of the main channels improves the selectivity for propane dehydrogenation to propene. Furthermore, introducing Na enhances the selectivity of propene.
Article
Materials Science, Multidisciplinary
Guangjian Wang, Ning Song, Kai Lu, Qinqin Zhang, Haitao Fu, Liancheng Bing, Fang Wang, Fengzhong Wang, Dezhi Han
Summary: Low-carbon olefins are important chemical building blocks and novel PtSn-based catalysts prepared on TiO2-Al2O3 composite supports exhibited improved catalytic performance in propane dehydrogenation reaction. The catalyst with 20 wt.% TiO2-Al2O3 composite support showed stable and highest propylene selectivity (>88%) during the investigation time.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Energy & Fuels
Ankit Agrawal, Omvir Singh, Ashok Kumar Yadav, Shailendra Tripathi, Anjan Ray, Vivek Pawar, Bipul Sarkar
Summary: On-purpose dehydrogenation technologies are gaining attention for the production of light olefins. Our study on a Mo-based bi-metallic catalyst, MoSn/Y, provides insights into the interatomic interactions between metals. This catalyst exhibits high selectivity, activity, and stability for the direct dehydrogenation of propane to propylene.
Article
Engineering, Chemical
Wenkai Chen, Kuiyi You, Yanan Wei, Fangfang Zhao, Zhenpan Chen, Jian Wu, Qiuhong Ai, He'an Luo
Summary: A low-polymeric VOx/SG catalyst has been developed for highly selective propane dehydrogenation (PDH) to propylene, showing high selectivity, good conversion, and excellent regenerability, with promising industrial application prospects.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Energy & Fuels
Shailesh Dangwal, Anil Ronte, Ghader Mahmodi, Payam Zarrintaj, Jong Suk Lee, Mohammad Reza Saeb, Heather Gappa-Fahlenkamp, Seok-Jhin Kim
Summary: Using a silicalite membrane reactor for propane dehydrogenation (PDH) reaction can achieve high propane conversion and propylene selectivity. Controlling operating conditions, such as increasing reaction temperature and pressure, can effectively enhance reaction performance and reduce the formation of by-products.
Article
Chemistry, Physical
Bohan Feng, Dong Li, Jing Xiong, Yuechang Wei, Yuanfeng Li, Zhen Zhao, Weiyu Song, Xiangyang Ji, Jian Liu, Chunming Xu
Summary: Nano-catalysts of vanadium oxides (VOx) deposited on an Al2O3 support were synthesized by impregnation. The VOx/Al2O3 catalysts exhibited superior catalytic performances in photothermal propane nonoxidative dehydrogenation (PDH) reaction, with the catalytic activity depending strongly on the surface states of the supported VOx. In-situ structure characterizations revealed that V2O5 on the support's surface was transformed into mono-layer dispersed VOx during photothermal PDH, which could further be reconstructed into highly dispersed V2O3 nanocrystals under the reaction conditions. Experimental and theoretical calculations showed that the in-situ formed V2O3 played a crucial role, as its unique 3D structure induced the localized surface plasmon resonance effect and enhanced visible light absorption, thereby promoting C-H breaking in C3H8 molecules.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Hiroya Ito, Kazumasa Oshima, Tsuyoshi Yamamoto, Kah Wei Ting, Takashi Toyao, Takeharu Sugiyama, Yuzuru Kato, Kentaro Morita, Asuka Ohashi, Masahiro Kishida
Summary: The addition of selenium (Se) improves the stability and catalytic activity of Pt catalysts, promoting the desorption of products and suppressing catalyst deterioration through an electron donation effect.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Chen Song, Jiarui Wang, Simin Wang, Jian Wen
Summary: The catalytic propane dehydrogenation reaction was studied in a bench-scale fluidized bed using experimental and computational methods. The effects of catalyst packing temperature, propane weight hourly space velocity, and catalyst composition on propane conversion were investigated. Results showed that temperature and velocity significantly influenced conversion rates, and the CrOx-based catalyst exhibited higher conversions compared to the Pt-based catalyst.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Yuming Li, Xuezhi Yu, Qiyang Zhang, Vita A. Kondratenko, Yajun Wang, Guoqing Cui, Mingxia Zhou, Chunming Xu, Evgenii V. Kondratenko, Guiyuan Jiang
Summary: Vanadium-based catalysts supported on hexagonal mesoporous SiO2 (HMS) were prepared and their catalytic performance in the non-oxidative propane dehydrogenation to propylene (PDH) was investigated. The structure and catalytic activity of VOx species, as well as the reaction mechanism, were studied. The results showed that low-polyvanadate exhibited high catalytic activity and stability.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Majid Lasisi Balogun, Sagir Adamu, Mohammed S. Ba-Shammakh, Mohammad M. Hossain
Summary: The study investigated the CO2-assisted oxidative dehydrogenation of propane to propylene over fluidizable mesoporous VOx/La2O3-gamma-Al2O3 catalysts, with the La and gamma-Al2O3 mixed oxide catalysts exhibiting desired properties and significant enhancement in performance under CO2 assistance. Among the catalysts tested, the VOx/gamma-Al2O3 catalyst showed the highest propylene yield at 550 degrees Celsius.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Huan Yan, Kun He, Izabela A. Samek, Dian Jing, Macy G. Nanda, Peter C. Stair, Justin M. Notestein
Summary: The study demonstrated that growing In2O3 over Pt/Al2O3 using atomic layer deposition results in a nanostructure that kinetically couples domains through surface hydrogen atom transfer, improving the selective oxidative dehydrogenation of propane. In contrast, other nanostructures, such as Pt on In2O3 or Pt mixed with In2O3, were unable to organize the reactions effectively, resulting in more propane combustion.
Article
Chemistry, Multidisciplinary
Martin Ek, Logi Arnarson, Poul Georg Moses, Soren B. Rasmussen, Magnus Skoglundh, Eva Olsson, Stig Helveg
Summary: The research found that there are differences in the redox properties of vanadium oxide nanoparticles on different crystal facets, with vanadium ions on {001} facets maintaining higher oxidation states than on {10l} facets. This sensitivity to surface structure in redox processes opens up new possibilities for tailoring oxide nanoparticles for enhanced catalytic functionalities.
Article
Engineering, Environmental
Chems Eddine Gherdaoui, Zohra Bouberka, Jean-Philippe Delbarre, Olivier Hutin, Roger Sansano, Laurent Leclercq, Philippe Supiot, Ulrich Maschke
Summary: Polychlorinated biphenyls (PCBs) were widely used as electrical insulators in transformers and power capacitors due to their unique chemical properties. Accurately identifying and quantifying their presence in dielectric fluids is an important challenge.
WASTE MANAGEMENT & RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Rafik Benrabaa, Martine Trentesaux, Pascal Roussel, Annick Rubbens, Rose-Noelle Vannier, Axel Lofberg
Summary: NiAlxFe2_xO4 was synthesized and evaluated in methane reforming without pretreatment. The precursor nature significantly influenced the structural, textural, and reactivity properties. The aluminum compound exhibited high catalytic activity, while NiFe2O4 showed poor activity. Powders prepared with chlorides were more active at low temperatures, but this trend diminished at high temperatures. NiAl2O4 from nitrate precursors showed the best catalytic performance.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Multidisciplinary
Itzhak I. Maor, Svetlana Heyte, Oren Elishav, Meirav Mann-Lahav, Joelle Thuriot-Roukos, Sebastien Paul, Gideon S. Grader
Summary: A new architecture of Cu- and Cu/Zn-based catalysts supported on electrospun alumina nanofibers was synthesized for the synthesis of methanol and DME from CO2 and green hydrogen. The hierarchical fibrous structure of the catalyst played a crucial role in the reaction activity and selectivity. The Cu or Cu/ZnO formed a unique nanosheet structure, providing a large surface area for the reaction. The catalysts containing 7% wt. Cu/Zn with a weight ratio of 2.3 Zn to Cu achieved maximal production of methanol and DME.
Article
Crystallography
Zohra Taibi, Kahina Bentaleb, Zohra Bouberka, Christel Pierlot, Maxence Vandewalle, Christophe Volkringer, Philippe Supiot, Ulrich Maschke
Summary: This report investigates the modification of a bentonite clay to enhance its adsorption capacity for the removal of azo dyes. The clay was purified and modified through acid activation and intercalation with a cationic surfactant. The modified clays showed significantly increased surface area and pore volume compared to the original clay. The modified clay with the highest adsorption capacity was found to be a promising low-cost material for the removal of azo dyes.
Article
Chemistry, Multidisciplinary
Rafik Benrabaa, Annick Rubbens, Axel Lofberg, Rose-Noelle Vannier
Summary: The surface properties of ferrite spinel nanoparticles were investigated by catalytic conversion of isopropanol and ammonia Temperature Programmed Reduction (NH3-TPD). The synthesized oxide exhibited a mixed phase structure, with NiFe2O4 as the major phase and alpha-Fe2O3 as an additional phase. The surface acidity increased dramatically with temperature, and both acidic and redox/basic sites were present during the catalytic conversion of isopropanol.
Article
Chemistry, Physical
Amanda Sfeir, Camila A. Teles, Carmen Ciotonea, G. N. Manjunatha Reddy, Maya Marinova, Jeremy Dhainaut, Axel Lofberg, Jean-Philippe Dacquin, Sebastien Royer, Said Laassiri
Summary: In this study, the catalytic activity of Co3Mo3N was improved by dispersing it into a high surface area silica-based support (SBA-15). SBA-15 demonstrated good thermal and chemical stability, and supported CoMo-N/SBA-15 catalysts exhibited enhanced catalytic activity in ammonia synthesis compared to the classical Co3Mo3N catalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
M. El Doukkali, S. Paul, F. Dumeignil
Summary: This study proposes a rationalized approach to develop catalysts for glycerol-to-propylene routes. The use of hydrophobic-inert silica supports protects reactive Mo particles against leaching and sintering. Carburizing MoOx nanoparticles to beta-Mo2C leads to an extremely efficient HDO catalyst with high propylene yield.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Carmen Ciotonea, Yaqian Wei, Adrian Ungureanu, Cezar Catrinescu, Olivier Gardol, Anne-Sophie Mamede, Franck Dumeignil, Sebastien Paul, Louise Jalowiecki-Duhamel, Sebastien Royer
Summary: This study investigates the use of nickel-based materials in the dry reforming of methane, an important process for producing hydrogen and syngas. Ni nanoparticles are formed from porous phyllosilicates under reducing conditions. The nanoparticles are highly dispersed even at high metal loadings, and show excellent resistance to sintering and carbon formation. The results demonstrate the potential of these materials for DRM applications.
Article
Biochemistry & Molecular Biology
Hussam Aldoori, Zohra Bouberka, Herve Feuchter, Skander Khelifi, Franck Poutch, Loic Brison, Fouad Laoutid, Stijn Steuperaert, Corinne Foissac, Philippe Supiot, Christian Malas, Ulrich Maschke
Summary: This report investigated the photodegradation of the brominated flame retardant Decabromodiphenyl ether (DBDE or BDE-209) in commercially available Poly(acrylonitrile-butadiene-styrene) (ABS) and Poly(carbonate) (PC) using a low-pressure reactor and UV-visible light. The study aimed to decompose the BFR in plastic waste from electrical and electronic equipment (EEE) while maintaining the specifications of the polymer materials for recycling. The results showed that DBDE underwent rapid photodegradation, reaching degradation yields above 90% after 15 minutes of irradiation. The evaluation of polymer properties revealed superficial crosslinking effects, slightly accelerated by the presence of DBDE, but the overall thermal and structural properties of the virgin polymers were maintained.
Article
Cell Biology
Clement Philippe Delannoy, Egon Heuson, Adrien Herledan, Frederik Oger, Bryan Thiroux, Mickael Chevalier, Xavier Gromada, Laure Rolland, Philippe Froguel, Benoit Deprez, Sebastien Paul, Jean-Sebastien Annicotte
Summary: Type 2 diabetes is a metabolic disorder affecting over 537 million people worldwide, characterized by loss of pancreatic beta-cell function and insulin resistance. Long-term control of glycemia is challenging, highlighting the need for new drugs and targets to improve beta-cell function and insulin secretion. In this study, a high-throughput screening method using automated cellular assays and mass spectrometry was developed, identifying potential regulators of insulin secretion and synthesis among siRNA and chemical compounds.
Article
Chemistry, Physical
Leticia F. Sosa, Priscilla M. de Souza, Raphaela A. Rafael, Robert Wojcieszak, Valerie Briois, Lucas R. Francisco, Raimundo C. Rabelo-Neto, Eric Marceau, Sebastien Paul, Fabio S. Toniolo, Fabio B. Noronha
Summary: This study investigated the performance of Mo2C, Mo2C/SiO2, Ni-MoxCy/SiO2, and Cu-MoxCy/SiO(2 )catalysts for the hydrodeoxygenation of m-cresol at 300℃ and atmospheric pressure. The presence of a second metal promoted the first step of reduction but did not assist the carburizing step. All carbides were highly selective to toluene, indicating that Mo2C species is the active site responsible for the deoxygenation of m-cresol. The Mo2C/SiO2 catalyst carburized at 400℃ was inactive due to the lower oxophilicity of the oxycarbide species.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Review
Chemistry, Physical
Joelle Thuriot-Roukos, Camila Palombo Ferraz, Hisham K. Al Rawas, Svetlana Heyte, Sebastien Paul, Ivaldo Itabaiana Jr, Mariusz Pietrowski, Michal Zielinski, Mohammed N. Ghazzal, Franck Dumeignil, Robert Wojcieszak
Summary: Supported gold nanoparticles are effective catalysts for the base-free oxidation of furfural derived from biomass. The support preparation method and solution pH have been found to be crucial factors in determining the selectivity and yield of the oxidation reaction.
Article
Crystallography
Ana Barrera, Corinne Binet, Florence Danede, Jean-Francois Tahon, Baghdad Ouddane, Frederic Dubois, Philippe Supiot, Corinne Foissac, Ulrich Maschke
Summary: The chemical, structural, and thermal properties of recovered nematic Liquid Crystal (LC) mixtures were investigated using various analytical techniques. A large quantity of 65,700 End-Of-Life (EOL) Liquid Crystal Display (LCD) screens were used to extract these LC blends. The heterogeneous nature of the studied EOL-LCD screens, due to different brands, production years, and dimensions, was observed. The collected screens had an average diagonal size of 24 inches and exhibited typical chemical structures of LC molecules with aliphatic chains and aromatic and polar groups. POM observations showed Schlieren and marble-like textures, characteristic of nematic LCs, at room temperature. Thermal characterization and thermo-optical analysis revealed a broad nematic phase between -90°C and +70°C for these LC mixtures.
Article
Chemistry, Physical
Tianyu Gao, Kilaparthi Sravan Kumar, Zhen Yan, Maya Marinova, Martine Trentesaux, Mohammed A. Amin, Sabine Szunerits, Yong Zhou, Vlad Martin-Diaconescu, Sebastien Paul, Rabah Boukherroub, Vitaly Ordomsky
Summary: The hydrogen and oxygen evolution reactions (HER and OER) are crucial steps in electrochemical water splitting. Efficient electrocatalysts for both reactions under alkaline conditions are still a challenge. Currently, nitrogen-doped carbon stabilized single atom Ru and RuO2 are the preferred materials for HER and OER, respectively. This study proposes a strategy for preparing Ru embedded in a carbon nitride matrix for efficient HER and OER in KOH solution, demonstrating smaller overpotentials and high catalytic stability compared to benchmark catalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Organic
A. S. Fedotov, D. Yu. Grachev, R. A. Bagdatov, M. V. Tsodikov, V. I. Uvarov, R. D. Kapustin, S. Paul, F. Dumeignil
Summary: A series of tubular porous ceramic converters modified with mono- and bimetallic catalytic systems based on rhenium and tungsten were prepared using a combination of self-propagating high-temperature synthesis and the sol-gel method. These converters were tested in the dehydrogenation of ethylbenzene to styrene. Among the tested samples, a monometallic tungsten-containing converter showed the best performance, achieving the highest yield and productivity of styrene.
PETROLEUM CHEMISTRY
(2023)