期刊文献+
共找到7篇文章
< 1 >
每页显示 20 50 100
Influence of support properties on selective oxidation of 2-methylnaphthalene on vanadia-molybdena based catalyst
1
作者 Yi Yu Fanfan Li +3 位作者 Xiaocong Li Guoji Liu Li Xu Xingchuan Yang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第12期106-116,共11页
In this work,the catalytic performance of vanadia-molybdena loaded on TiO_(2),MgO,ZSM-5,NaY and Mordenite was investigated in the selective oxidation of 2-methylnaphthalene(2-MN)to 2-naphthaldehyde(2-NA).Results show ... In this work,the catalytic performance of vanadia-molybdena loaded on TiO_(2),MgO,ZSM-5,NaY and Mordenite was investigated in the selective oxidation of 2-methylnaphthalene(2-MN)to 2-naphthaldehyde(2-NA).Results show that strong interactions between supports(TiO2,ZSM-5)and active components can promote the dispersion of active component.Monolayer VOx and MoOx are the main form on the catalyst surface,which is beneficial to the 2-NA selectivity.However,the corresponding weak interactions between Mordenite and active components may lead to the production of oxide crystals and the separation of active components,thus reducing the 2-NA selectivity.Due to the high Na content,new crystal NaVMoO6 forms on the NaY surface,which is inactive in the reaction.For V-Mo/TiO2,V and Mo can be inserted into the TiO2 lattice,changing the electronic structures of active components and support and improving the activity of surface oxygen species.This investigation highlights an important consideration on supports properties when designing supported catalysts. 展开更多
关键词 2-methylnaphthalene Catalysis Partial oxidation SUPPORT Interactions
下载PDF
Methylation of 2-Methylnaphthalene with Methanol over NH_4 F and Pt Modified HZSM-5 Catalysts 被引量:7
2
作者 赵亮 郭新闻 +2 位作者 刘民 王祥生 宋春山 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第5期742-749,共8页
Shape-selective methylation of 2-methylnaphthalene (2-MN) was carried out over NH 4 F and Pt modified HZSM-5 (SiO 2 /Al 2 O 3 = 83) catalysts in a fixed-bed down-flow reactor using methanol as methylating agent and 1,... Shape-selective methylation of 2-methylnaphthalene (2-MN) was carried out over NH 4 F and Pt modified HZSM-5 (SiO 2 /Al 2 O 3 = 83) catalysts in a fixed-bed down-flow reactor using methanol as methylating agent and 1,3,5-trimethylbenzene (1,3,5-TMB) as a solvent. Pt promoted HZSM-5 catalysts showed low concentration of coke-like polycondensed aromatics, NH 4 F modification decreased non-shape-selective acid sites. After Pt and NH 4 F co-modification, both conversion of 2-MN and selectivity to 2,6-DMN were improved. 6%NH 4 F/0.5%Pt/HZSM-5 catalyst exhibited 13.8% of 2-MN conversion with 6.2% of 2,6-DMN yield after 7 h time on stream (TOS), and 2,6-/2,7-DMN ratio of 1.7 after 10 h of TOS. 展开更多
关键词 2-methylnaphthalene METHYLATION HZSM-5 2 6-dimethylnaphthalene NH 4 F/Pt/HZSM-5
下载PDF
The effect of operating conditions on acylation of 2-methylnaphthalene in a microchannel reactor 被引量:3
3
作者 Wenpeng Li Suohe Yang +2 位作者 Xiaoyan Guo Guangxiang He Haibo Jin 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第6期1307-1311,共5页
Acylation of 2-methylnaphthalene(2-MN) is a very important reaction in organic synthesis,and the effiency of the continuous reactor is more than one of the batch reactor.Considering that the Friedel–Crafts acylation ... Acylation of 2-methylnaphthalene(2-MN) is a very important reaction in organic synthesis,and the effiency of the continuous reactor is more than one of the batch reactor.Considering that the Friedel–Crafts acylation is a rapid exothermic reaction,in this study,we perform the acylation of 2-MN in a stainless steel microchannel flow reactor,which is characterized by high mass and heat transfer rates.The effect of reactant ratio,mixing temperature,reaction temperature,and reaction time on product yield and selectivity were investigated.Under the optimal conditions,2-methyl-6-propionylnaphthalene(2,6-MPN) was obtained in 85.8% yield with 87.5% selectivity.Compared with the conventional batch system,the continuous flow microchannel reactor provides a more efficient method for the synthesis of 2,6-MPN. 展开更多
关键词 ACYLATION Microchannel reactor 2-methylnaphthalene 2-Methyl-6-propionylnaphthalene
下载PDF
Effect of Ammonia on the Performance of Catalysts for Selective Hydrogenation of 1-Methylnaphthalene 被引量:4
4
作者 Ge Panzhu Ren Liang +1 位作者 Gao Xiaodong Li Dadong 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2015年第4期1-7,共7页
The effect of ammonia on the catalytic performance for 1-methylnaphthalene(1-MN) selective hydrogenation saturation was studied with Co-Mo/γ-Al_2O_3, Ni-W/γ-Al_2O_3, Ni-Mo/γ-Al_2O_3, and Ni-Mo-W/γ-Al_2O_3 catalyst... The effect of ammonia on the catalytic performance for 1-methylnaphthalene(1-MN) selective hydrogenation saturation was studied with Co-Mo/γ-Al_2O_3, Ni-W/γ-Al_2O_3, Ni-Mo/γ-Al_2O_3, and Ni-Mo-W/γ-Al_2O_3 catalysts. The results indicated that Ni-Mo-W/γ-Al_2O_3 catalyst exhibited the best performance for saturation of 1-MN. The introduction of NH3 remarkably inhibited the hydrogenation of 1-MN in the dynamic control area, but it had no effect in the thermodynamic control area. Besides, the mono-aromatics selectivity on the Ni-Mo-W and Ni-Mo catalysts was enhanced. However, it had little effect on the Ni-W and Co-Mo catalysts. 展开更多
关键词 1-methylnaphthalene(1-MN) selectivity hydrogenation catalyst hydrogenation saturation
下载PDF
UV Light Induced Transformation of 1-Methylnaphthalene in the Presence of Air and Its Implications for Contaminants Research
5
作者 Yong-Lai Feng Jyoti P. Nandy +4 位作者 Yuqing Hou Francois Breton Ben Lau Jianshun Zhang Jiping Zhu 《Journal of Environmental Protection》 2012年第11期1519-1531,共13页
Understanding chemical transformations of contaminants and the resulting products is extremely important in devising proper monitoring methods for such contaminants and in assessing potential human exposure to the tra... Understanding chemical transformations of contaminants and the resulting products is extremely important in devising proper monitoring methods for such contaminants and in assessing potential human exposure to the transformation products in the environment. Ultraviolet (UV) light from the sun can induce various photochemical transformations of contaminants in the environment. Alkylnaphthalenes are light-molecular-weight polycyclic aromatic hydrocarbons (PAHs) which are one of the most widespread organic pollutants present in ambient air as a result of a variety of incomplete combustion sources. In this study, 1-methylnapthalene,a typical example of an alkylnaphthalene, was subjected to UV irradiation to investigate its transformation in the presence and absence of air. Twenty-one products were detected in the reaction mixtures. Some photo-oxidation products were identified, including both ring-opened and ring-retained oxygenated compounds, such as 1-naphthaldehyde, 1-naphthoic acid, 1-naphthalenemethanol and phthalic anhydride. Although dimeric products were observed in the presence of air, more were found in the presence of helium or argon gas, indicating a different photo-oxidation pathway from those commonly observed in other media, such as water. Under just 48 hours of exposure to the UV light in the presence of air, three major products were formed with a production yield of about 10% each. Compared to 1-methylnapthalene, the UV induced transformation products observed in this study are more volatile, acidic, water soluble or toxic. The formation of these products may significantly change our understanding of the risks assessed solely from the parent compound in contaminants research and supports the inclusion of airborne transformations of the parent compound in risk assessment. 展开更多
关键词 TRANSFORMATION Products 1-methylnaphthalene UV Light PHOTO-OXIDATION CONTAMINANTS RESEARCH
下载PDF
A Study on the Coking Sites ofγ-Alumina Surface Using 1-Methylnaphthalene as the Model Reactant
6
作者 Hu Anpeng Han Wei +3 位作者 Zhang Le Long Xiangyun Li Mingfeng Nie Hong 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2018年第4期37-43,共7页
The support γ-Al_2O_3 was treated with 1-methylnaphthalene as the model reactant by respectively using the chemical static adsorption method and the accelerated coking method to study the coking sites of γ-Al_2O_3 s... The support γ-Al_2O_3 was treated with 1-methylnaphthalene as the model reactant by respectively using the chemical static adsorption method and the accelerated coking method to study the coking sites of γ-Al_2O_3 surface. The carbon species formed on γ-Al_2O_3 surface were analyzed by CAT-CS, TG-MS, IR-OH, and Py-IR techniques. The results of characterization by CAT-CS and TG-MS techniques indicated that the carbon species formed during the chemical static adsorption process is mainly composed of the reversibly adsorbed coke precursors with a lowly-condensed state, while that formed after the accelerated coking process is probably related with the irreversibly adsorbed coke deposits with a highlycondensed state. The results of characterization by IR-OH and Py-IR techniques further implied that the formation of the two kinds of carbon species, i.e., coke precursors and coke deposits, are closely related with the basic hydroxyl groups and the strong Lewis acid sites on γ-Al_2O_3 surface. The results lead to a deep insight into the coking mechanism on the alumina surface. 展开更多
关键词 1-methylnaphthalene Γ-AL2O3 COKING SITES chemical static adsorption ACCELERATED COKING
下载PDF
Electron-transfer reactions between alkali metal and C_(60) mediated by 1-methylnaphthalene
7
作者 黄祖恩 陈键 +4 位作者 蔡瑞芳 邵倩芬 陈士明 耿鸿芝 叶红娟 《Chinese Science Bulletin》 SCIE EI CAS 1995年第15期1263-1266,共4页
Alkali metal fullerides (A<sub>n</sub>C<sub>60</sub>) are versatile reagents in synthetic chemistry ofbuckminsterfullerene, for example, controlled chemical functionalizations of buckminster-fu... Alkali metal fullerides (A<sub>n</sub>C<sub>60</sub>) are versatile reagents in synthetic chemistry ofbuckminsterfullerene, for example, controlled chemical functionalizations of buckminster-fullerene might be achieved by using precursors C<sub>60</sub><sup>n-</sup>M in a desired oxidation state.Vapor-transport technique was widely used to investigate the electron-transfer reactionsbetween C<sub>60</sub> and alkali metal. This method, however, required higher temperature condi-tions (200—400℃) and a longer period of reaction time (10—15 d). Direct reactions of C<sub>60</sub> 展开更多
关键词 C60 ALKALI metal 1-methylnaphthalene ELECTRON-TRANSFER reactions.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部