Provided are a useful-hydrocarbon production method and a useful-hydrocarbon production device that employ a methane-containing hydrocarbon and carbon dioxide, which are easily obtained raw materials, to enable efficient production over a long period of time. The present invention provides a useful-hydrocarbon production method including: a dry reforming step for generating a first gas containing carbon monoxide and hydrogen from a mixed gas containing a methane-containing hydrocarbon and carbon dioxide; a useful-hydrocarbon generating step for generating a second gas containing a useful-hydrocarbon from the carbon monoxide and the hydrogen in the first gas; and a recycling step for separating a carbon dioxide-containing gas from the second gas and supplying said gas to the dry reforming step.
C01B 3/38 - Production of hydrogen or of gaseous mixtures containing hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
C07C 1/04 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of carbon from carbon monoxide with hydrogen
C07C 9/02 - Acyclic saturated hydrocarbons with one to four carbon atoms
2.
STRUCTURE FOR ATTACHING GRATING LID ONTO RESIN TROUGH BODY; TROUGH TRACK; TROUGH TRACK FORMING METHOD; AND GRATING LID
This resin trough body 3 has an approximately U-shape cross-sectional shape comprising a bottom section 9 and side sections 7 on the two sides. Vertical reinforcement ribs 11 are formed at a prescribed interval on the outer surface of both side sections 7 of a trough body 3 of a prescribed length. Further, near the front and back ends of the trough body 3, horizontal ribs 13 are formed so as to link two vertical ribs 11. An accommodation space for accommodating a grating lid 5 is formed by a pair of L-shape members 23 being fixed with bolts to a fixing jig 93 that has been attached to the horizontal ribs 13. The grating lid 5 is accommodated in said accommodation space, and the grating lid 5 is fixed to a bolt fixing section, which is an attachment hole 25b formed in the horizontal plane of the L-shape members 23.
The present invention provides a cathode electrode on which a catalytic reaction for producing an olefin-type hydrocarbon such as ethylene or an alcohol such as ethanol through a carbon dioxide reduction reaction can be sustained stably for a long period.?A cathode electrode for reducing carbon dioxide electrically, comprising cuprous oxide, copper and at least one other metal element selected from the group consisting of silver, gold, zinc and cadmium.
C25B 11/04 - Electrodes; Manufacture thereof not otherwise provided for characterised by the material
B01J 23/80 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with zinc, cadmium or mercury
B01J 37/02 - Impregnation, coating or precipitation
The welding method according to the present invention comprises a step of irradiating a workpiece with a laser beam while moving the laser beam and the workpiece relative to one another, and scanning the laser beam over the workpiece while melting and welding the irradiated portion of the workpiece. The laser beam is constituted by a main power region and a secondary power region that is at least partially on the scanning direction side of the main power region. The power density of the main power region is equal to or greater than the power density of the secondary power region, and is of a power density that is at least capable of generating keyholes.
This welding method comprises: composing an object to be processed by overlapping plated sheet materials having a plated layer formed on a surface of a base material; arranging the object to be processed in a region irradiated with laser light; irradiating a surface of the object to be processed with a plurality of beams with the positions thereof being dispersed such that the respective centers of the plurality of beams do not overlap each other in a predetermined region on the surface; causing the plurality of beams and the object to be processed to be moved relatively while performing the irradiating; melting irradiated portions of the object to be processed and performing welding while sweeping the plurality of beams over the object to be processed; and setting the distances at which the plurality of beams are irradiated so that molten pools formed on the object to be processed by irradiation with each of the plurality of beams overlap each other.
The present invention includes a step for placing an object to be processed in an area which is irradiated with a laser beam from a laser device, relatively moving the laser beam and the object to be processed while the object to be processed is irradiated with the laser beam from the laser device, sweeping the laser beam on the object to be processed, and melting the irradiated portion of the object to be processed and perform welding thereon. The laser beam is formed of a main beam and a side beam having at least a part thereof forward in a sweep direction, and the power density of the main beam is not less than the power density of the side beam.
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