Abstract:Syngas conversion by Fischer-Tropsch synthesis (FTS) is characterized by aw ide distribution of hydrocarbon products ranging from one to af ew carbon atoms.R eported here is that the product selectivity is effectively steered toward ethylene by employing the oxide-zeolite (OX-ZEO) catalyst concept with ZnCrO x -mordenite (MOR). The selectivity of ethylene alone reaches as high as 73 %a mong other hydrocarbons at a2 6% CO conversion. This selectivity is significantly higher than those obtained in any other dire… Show more
“…It is more attractive that the CO 2 selectivity is less than 2% throughout the whole process, and the byproducts are mainly ethylene and CO, which are both valuable feedstocks for a vast array of chemicals. 51,52 Weight hourly space velocity (WHSV) affects the propane conversion and propylene selectivity as well (Figure S17a), and the reaction order of reaction gas (2.23 for propane and 0.77 for O 2 , Figure S17b) is in good agreement with the previous reports. 16,18 The long-term stability of SS-BNNSs for ODHP was conducted at 490 °C for 100 h (Figure 5c).…”
The assembly of two-dimensional (2D) nanosheets into three-dimensional (3D) well-organized superstructures is one of the key topics in materials chemistry and physics, due to their potential applications in various fields. Herein, starting from the crystalline metal−organic framework (MOF) particles, a spherical superstructure consisting of metal−organic framework nanosheets (SS-MOFNSs) is synthesized via a simple solvothermal transformation process. After pyrolysis and nitrogenization in ammonia, the SS-MOFNSs are further transformed into the spherical superstructure consisting of boron nitride nanosheets (SS-BNNSs), which preserve the original spherical superstructure morphology. Taking advantage of this unique superstructure, the resulting SS-BNNSs exhibit excellent catalytic activity for selective oxidative dehydrogenation of propane to produce propylene and ethylene. The results of this work provide a novel synthetic strategy to fabricate 3D spherical superstructures consisting of 2D nanosheets for highperformance applications in catalysis, energy storage, as well as other related fields.
“…It is more attractive that the CO 2 selectivity is less than 2% throughout the whole process, and the byproducts are mainly ethylene and CO, which are both valuable feedstocks for a vast array of chemicals. 51,52 Weight hourly space velocity (WHSV) affects the propane conversion and propylene selectivity as well (Figure S17a), and the reaction order of reaction gas (2.23 for propane and 0.77 for O 2 , Figure S17b) is in good agreement with the previous reports. 16,18 The long-term stability of SS-BNNSs for ODHP was conducted at 490 °C for 100 h (Figure 5c).…”
The assembly of two-dimensional (2D) nanosheets into three-dimensional (3D) well-organized superstructures is one of the key topics in materials chemistry and physics, due to their potential applications in various fields. Herein, starting from the crystalline metal−organic framework (MOF) particles, a spherical superstructure consisting of metal−organic framework nanosheets (SS-MOFNSs) is synthesized via a simple solvothermal transformation process. After pyrolysis and nitrogenization in ammonia, the SS-MOFNSs are further transformed into the spherical superstructure consisting of boron nitride nanosheets (SS-BNNSs), which preserve the original spherical superstructure morphology. Taking advantage of this unique superstructure, the resulting SS-BNNSs exhibit excellent catalytic activity for selective oxidative dehydrogenation of propane to produce propylene and ethylene. The results of this work provide a novel synthetic strategy to fabricate 3D spherical superstructures consisting of 2D nanosheets for highperformance applications in catalysis, energy storage, as well as other related fields.
“…13 , we believe that CO 2 hydrogenation cannot proceed over H-ZSM-5. Some evidences were put forward by Jiao et al 14 , 17 , 20 to support the ketene intermediate mechanism for STO or STA reactions over oxides/zeolites composite catalysts, however, we consider that this mechanism does not work in CO 2 hydrogenation over ZnAlO x &H-ZSM-5 due to very low concentration of CO in the reaction process. Fig.…”
Transformation of greenhouse gas CO2 and renewable H2 into fuels and commodity chemicals is recognized as a promising route to store fluctuating renewable energy. Although several C1 chemicals, olefins, and gasoline have been successfully synthesized by CO2 hydrogenation, selective conversion of CO2 and H2 into aromatics is still challenging due to the high unsaturation degree and complex structures of aromatics. Here we report a composite catalyst of ZnAlOx and H-ZSM-5 which yields high aromatics selectivity (73.9%) with extremely low CH4 selectivity (0.4%) among the carbon products without CO. Methanol and dimethyl ether, which are synthesized by hydrogenation of formate species formed on ZnAlOx surface, are transmitted to H-ZSM-5 and subsequently converted into olefins and finally aromatics. Furthermore, 58.1% p-xylene in xylenes is achieved over the composite catalyst containing Si-H-ZSM-5. ZnAlOx&H-ZSM-5 suggests a promising application in manufacturing aromatics from CO2 and H2.
Cost analysis model for catalytic conversion of syngas in to light hydrocarbon gases Information Processing in Agriculture 2, 37 (2015); Facile biphasic catalytic process for conversion of monoterpenoids to tricyclic hydrocarbon biofuels Journal of Energy Chemistry 49, 42 (2020); Erratum to: Recent advances for the production of hydrocarbon biofuel via deoxygenation progress Science Bulletin 61, 263 (2016); Research advances and direction of hydrocarbon accumulation in the superimposed basins, China: Take the Tarim Basin as an example
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