摘要:
A process for producing aromatic hydrocarbons and hydrogen, in which a lower hydrocarbons-containing feedstock gas is reformed by being supplied to and being brought into contact with a catalyst under high temperature conditions thereby forming aromatic hydrocarbons and hydrogen. The method includes the steps of (a) supplying a hydrogen gas together with the feedstock gas during a supply of the feedstock gas; and (b) suspending the supply of the feedstock gas for a certain period of time while keeping a condition of a supply of the hydrogen gas. The catalyst is exemplified by a metallo-silicate carrying molybdenum and a metallo-silicate carrying molybdenum and rhodium. An amount of the hydrogen gas supplied together with the feedstock gas is set to be preferably larger than 2% and smaller than 10%, more preferably within a range of from 4 to 8%, much more preferably 8%. As a pretreatment for a reforming reaction by which aromatic hydrocarbons and hydrogen are formed, the catalyst is increased in temperature and kept at the temperature for a certain period of time while a gas containing methane and hydrogen is supplied thereto.
摘要:
An aromatic compound, particularly benzene, is stably produced in the presence of a catalyst from a lower hydrocarbon having 2 or more carbon atoms, particularly from an ethane-containing gas composition such as ethane gas and natural gas. Disclosed is a process for producing an aromatic compound by reacting ethane or an ethane-containing raw gas in the presence of a catalyst. The catalyst may comprise molybdenum carried on metallosilicate such as H-type ZSM-5H or H-type MCM-22. In the reaction, the temperature is from 550 to 750° C., preferably not lower than 600° C. and not higher than 680° C. Additionally, the raw gas further contains methane and hydrogen is added thereto, thereby improving the production efficiency and stability.
摘要:
The efficiency of dehydrogenation and that of hydrogenation are improved. A hydrogen generator for generating hydrogen by dehydrogenation of organic hydrides in the presence of a catalyst is characterized by comprising a reactor vessel (10) of a multi-tubular structure having a region (12) for supplying fuel to generate heat necessary for dehydrogenation, the region containing a combustion catalyst for combusting fuel, and a region (11) containing a dehydrogenation catalyst necessary for dehydrogenation, the regions being arranged radially side by side with a wall separating them. A hydrogenation apparatus which synthesizes organic hydrides by way of hydrogenation of unsaturated hydrocarbons in the presence of a catalyst is characterized by comprising a reactor vessel (10) of a multi-tubular structure having a region (12) for removing the heat generated by hydrogenation and a region (11) containing a hydrogenation catalyst necessary for hydrogenation, the regions being arranged radially side by side with a wall separating them.
摘要:
The present cluster-included material characterized by utilizing a porous host material for clusters having a pore larger in size than that of zeolite. The cluster-included material is obtained by forming a cluster in a pore of a mesoporous material having a pore size of 1.3 to 10 nm. When the mesoporous material is particularly a mesoporous material having a pore volume of not less than 60% of a total pore volume within a pore size range of -40 to +40% of a pore size which shows a maximum peak in a pore size distribution curve, a granular cluster having a uniform particle size or a fine-linear cluster having a uniform diameter is obtained. The cluster-included material performs the various quantum effects.
摘要:
A method for producing ethanol by which ethanol can be synthesized from less fermentable biomass materials such as plant-derived materials and rice straws and industrial waste biomass materials such as wooden building materials and pulp and which can therefore broaden the range of raw materials for the production of ethanol. Specifically, a method for producing ethanol including reacting a raw material gas obtained by a thermochemical gasification reaction of biomass in the presence of a catalyst containing rhodium, at least one transition metal, and at least one element selected from lithium, magnesium and zinc.
摘要:
A catalyst structure 1 used for hydrogenation reaction or dehydrogenation reaction is characterized by the inclusion of a first coiled catalytic wire body 4 formed by coiling a catalytic wire in which a catalytic material is supported on the surface of a metallic core material, and a second catalytic member 5 disposed on the inner surface side and/or outer surface side of the coiled catalytic wire body 4.
摘要:
A data transmission server can cause identification information of a user who sent data and identification information of the user contained in the data to correspond to each other on one-to-one basis so as to prevent a person from transmitting data by pretending to be others. A memory stores client identification information for identifying the client and user identification information for identifying a user who operates the client, the client identification information and the user identification information being stored in correspondence to each other. The data received from the client is transmitted to the destination only when the client identification information of the client which transmits the data and the user identification information of the user contained in a header part and a data part of the data are stored in the memory in correspondence to each other.
摘要:
A data transmission server can cause identification information of a user who sent data and identification information of the user contained in the data to correspond to each other on one-to-one basis so as to prevent a person from transmitting data by pretending to be others. A memory stores client identification information for identifying the client and user identification information for identifying a user who operates the client, the client identification information and the user identification information being stored in correspondence to each other. The data received from the client is transmitted to the destination only when the client identification information of the client which transmits the data and the user identification information of the user contained in a header part and a data part of the data are stored in the memory in correspondence to each other.
摘要:
A catalyst for producing higher carbon number hydrocarbons, e.g., benzene from low carbon number hydrocarbons such as methane has been developed. The catalyst comprises a porous support such as ZSM-5 which has dispersed thereon rhenium and a promoter metal such as iron, cobalt, vanadium, manganese, molybdenum, tungsten and mixtures thereof. A process for preparing the catalyst and a process for converting low carbon number aliphatic hydrocarbons to higher number hydrocarbons in the presence of CO or CO2 at on conditions are also described.
摘要:
This specification discloses a spectacle frame of titanium or titanium alloy having at least one location a brazed portion of titanium or titanium alloy joined with titanium or titanium alloy, or of titanium or titanium alloy joined with other metal, characterized in that silver-zinc alloy comprising 70-95% by weight of silver and 5-30% by weight of zinc is used as the brazing filler metal material for brazing.