Abstract: A catalyst for synthesizing liquefied petroleum gas according to the present invention includes: a Cu—Zn-based catalytic material; and an MFI-type zeolite catalytic material supporting Pt, in which a ratio of the molar number of SiO2 to the molar number of Al2O3 contained in the MFI-type zeolite catalytic material (molar number of SiO2/molar number of Al2O3) is 20 or more and 60 or less.

Abstract: A catalyst for synthesizing liquefied petroleum gas according to the present invention includes: a Cu—Zn-based catalytic material; and an MFI-type zeolite catalytic material supporting a noble metal, in which the MFI-type zeolite catalytic material contains P, and a ratio of mass (MP) of P in the MFI-type zeolite catalytic material to mass (M2) of the MFI-type zeolite catalytic material is more than 0 mass % and less than 4.5 mass %.

Abstract: Provided are a useful hydrocarbon production method and a useful hydrocarbon production device using methane-containing hydrocarbon and carbon dioxide which are easily obtainable source materials and can efficient produce over a long period. The present invention provides a useful hydrocarbon on 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 of generating a second gas containing a useful hydrocarbon from the carbon monoxide and the hydrogen in the first gas; and a recycling step of separating a carbon dioxide-containing gas from the second gas and supplying the carbon dioxide-containing gas to the dry reforming step.

Abstract: A catalyst structure for synthesis gas production is used to produce a synthesis gas that includes carbon monoxide and hydrogen. The structure includes a carrier with a porous structure that comprises a zeolite-type compound; first catalyst particles that contain at least one iron-group element selected from the group consisting of nickel, iron, and cobalt; and a second catalyst that contains at least one transition metal element with redox capacity. The carrier includes, inside thereof, mutually communicating passages; the first catalyst particles are present at least in the passages of the carrier; and the second catalyst is present at least in the interior or on an outer surface of the carrier.

Abstract: A flux containing an organic acid, a water-soluble base agent, and a solvent, but not containing water is adopted. In this flux, the organic acid includes 1,2,3-propanetricarboxylic acid. The water-soluble base agent is one or more selected from the group consisting of a nonionic surfactant and a weak cationic surfactant. The content of the 1,2,3-propanetricarboxylic acid is 1% by mass or more and 15% by mass or less with respect to the total amount of the entire flux, the total content of the water-soluble base agent is 30% by mass or more and 65% by mass or less with respect to the total amount of the entire flux, and the total content of the solvent is 30% by mass or more and 65% by mass or less with respect to the total amount of the entire flux. According to this flux, the wettability of solder can be enhanced and ball missing after reflow and flux residue washing is suppressed.

Abstract: A diamond crystal substrate has a substrate surface that is one crystal plane among (100), (111), and (110) and that has atomic steps and terraces structure at an off-angle of 7° or less excluding 0°.

Abstract: A diamond crystal substrate has a substrate surface that is one crystal plane among (100), (111), and (110) and that has atomic steps and terraces structure at an off-angle of 7° or less excluding 0°.