Hydrogen production at room temperature from liquid methanol has been conducted using corona discharge. The content of water in methanol solution has a significant effect on this production. When water concentration...Hydrogen production at room temperature from liquid methanol has been conducted using corona discharge. The content of water in methanol solution has a significant effect on this production. When water concentration increases from 1.0% to 16.7%,the methanol conversion rate changes from 0.196 to 0.284 mol/h. An important finding in this investigation is the formation of ethylene glycol as a major by-product. The yield of ethylene glycol is ranged from 0.0045 to 0.0075 mol/h based on the water content.展开更多
In this investigation, a clean, atomic economic and direct synthesis of oxygenates (methanol, ethanol) form water and methane via dielectric-barrier discharge was developed at room temperature and under atmospheric pr...In this investigation, a clean, atomic economic and direct synthesis of oxygenates (methanol, ethanol) form water and methane via dielectric-barrier discharge was developed at room temperature and under atmospheric pressure. The effect of discharge voltage on this process was studied. The results showed that the conversion of water can be as high as 7%, the selectivity of methanol and ethanol can be as high as 100%.展开更多
The direct conversion of methane to methanol has attracted a great deal ofattention for nearly a century since it was first found possible in 1902, and it is still achallenging task. This review article describes rece...The direct conversion of methane to methanol has attracted a great deal ofattention for nearly a century since it was first found possible in 1902, and it is still achallenging task. This review article describes recent advancements in the direct partial oxidationof methane to methanol. The history of direct oxidation of methane and the difficulties encounteredin the partial oxidation of methane to methanol are briefly summarized. Recently reporteddevelopments in gas-phase homogeneous oxidation, heterogeneous catalytic oxidation and liquid phasehomogeneous catalytic oxidation of methane are reviewed.展开更多
CO2 is converted to methanol through an enzymatic approach using formate dehydro- genase (FateDH), formaldehyde dehydrogenase (FaldDH) and alcohol dehydrogenase (ADH) co- encapsulated in silica gel prepared by modifie...CO2 is converted to methanol through an enzymatic approach using formate dehydro- genase (FateDH), formaldehyde dehydrogenase (FaldDH) and alcohol dehydrogenase (ADH) co- encapsulated in silica gel prepared by modified sol-gel process as catalysts, TEOS as precursor, NADH as an electron donor. The highest yield of methanol was up to 92.1% under 37C, pH7.0 and 0.3Mpa.展开更多
High surface area Nafion/SiO2 nanocomposites with nano-sized Nafion resin particles entrapped and dispersed within the highly porous silica matrix exhibited significantly enhanced activity, high selectivity and long-t...High surface area Nafion/SiO2 nanocomposites with nano-sized Nafion resin particles entrapped and dispersed within the highly porous silica matrix exhibited significantly enhanced activity, high selectivity and long-term stability for the alkylation of benzene with linear C9-C13 alkenes owing to the increased accessibility of Nafion resin-based acid sites to reactants.展开更多
Superfine Mo/ZrO_2 catalysts were prepared for partial oxidation of methane to HCHO and characterized by BET, XRD, LRS, H2-TPR and XPS. Mo existed mainly in the form of Zr(MoO4)2, and the catalytic performance and phy...Superfine Mo/ZrO_2 catalysts were prepared for partial oxidation of methane to HCHO and characterized by BET, XRD, LRS, H2-TPR and XPS. Mo existed mainly in the form of Zr(MoO4)2, and the catalytic performance and physicochemical properties of the Mo/ZrO2 catalysts were closely related to this species.展开更多
The dynamic structure of Mo-O species in Ag-Mo-P-O catalyst was studied by in situ confocal microprobe laser Raman spectroscopy (LRS) and catalytic test. The results indicate Mo-O species of MoO3 transformed to Mo-O ...The dynamic structure of Mo-O species in Ag-Mo-P-O catalyst was studied by in situ confocal microprobe laser Raman spectroscopy (LRS) and catalytic test. The results indicate Mo-O species of MoO3 transformed to Mo-O species of AgMoO2PO4 in C3H8/O2/N2 (3/1/4) flow at 773 K. This behavior is closely relative to oxidative dehydrogenation of propane and intrinsic properties of Mo-O species. The Mo-O species of AgMoO2PO4 may be active species for oxidative dehydrogenation of propane.展开更多
基金Supports from the Key Fundamental Research Project of Ministry of Science and Technology of China(973,G1999022402)and ABB Switzerland are very appreciated.
文摘Hydrogen production at room temperature from liquid methanol has been conducted using corona discharge. The content of water in methanol solution has a significant effect on this production. When water concentration increases from 1.0% to 16.7%,the methanol conversion rate changes from 0.196 to 0.284 mol/h. An important finding in this investigation is the formation of ethylene glycol as a major by-product. The yield of ethylene glycol is ranged from 0.0045 to 0.0075 mol/h based on the water content.
文摘In this investigation, a clean, atomic economic and direct synthesis of oxygenates (methanol, ethanol) form water and methane via dielectric-barrier discharge was developed at room temperature and under atmospheric pressure. The effect of discharge voltage on this process was studied. The results showed that the conversion of water can be as high as 7%, the selectivity of methanol and ethanol can be as high as 100%.
文摘The direct conversion of methane to methanol has attracted a great deal ofattention for nearly a century since it was first found possible in 1902, and it is still achallenging task. This review article describes recent advancements in the direct partial oxidationof methane to methanol. The history of direct oxidation of methane and the difficulties encounteredin the partial oxidation of methane to methanol are briefly summarized. Recently reporteddevelopments in gas-phase homogeneous oxidation, heterogeneous catalytic oxidation and liquid phasehomogeneous catalytic oxidation of methane are reviewed.
基金The financial support from the National Natural Science Foundation of China (No.20176039) was greatly acknowledged.
文摘CO2 is converted to methanol through an enzymatic approach using formate dehydro- genase (FateDH), formaldehyde dehydrogenase (FaldDH) and alcohol dehydrogenase (ADH) co- encapsulated in silica gel prepared by modified sol-gel process as catalysts, TEOS as precursor, NADH as an electron donor. The highest yield of methanol was up to 92.1% under 37C, pH7.0 and 0.3Mpa.
文摘High surface area Nafion/SiO2 nanocomposites with nano-sized Nafion resin particles entrapped and dispersed within the highly porous silica matrix exhibited significantly enhanced activity, high selectivity and long-term stability for the alkylation of benzene with linear C9-C13 alkenes owing to the increased accessibility of Nafion resin-based acid sites to reactants.
基金This work is supported by the Ministry of Science and Technology(G199902240-06)
文摘Superfine Mo/ZrO_2 catalysts were prepared for partial oxidation of methane to HCHO and characterized by BET, XRD, LRS, H2-TPR and XPS. Mo existed mainly in the form of Zr(MoO4)2, and the catalytic performance and physicochemical properties of the Mo/ZrO2 catalysts were closely related to this species.
文摘The dynamic structure of Mo-O species in Ag-Mo-P-O catalyst was studied by in situ confocal microprobe laser Raman spectroscopy (LRS) and catalytic test. The results indicate Mo-O species of MoO3 transformed to Mo-O species of AgMoO2PO4 in C3H8/O2/N2 (3/1/4) flow at 773 K. This behavior is closely relative to oxidative dehydrogenation of propane and intrinsic properties of Mo-O species. The Mo-O species of AgMoO2PO4 may be active species for oxidative dehydrogenation of propane.
