Abstract: An ammonia synthesis catalyst, includes a composite oxide carrier in which at least one additive metal element selected from the group consisting of titanium (Ti), zirconium (Zr), hafnium (Hf), aluminum (Al), gallium (Ga), indium (In), silicon (Si), germanium (Ge), and tin (Sn) is solid-solutionized in a composite oxide containing cerium (Ce) and a lanthanide other than Ce and having a composition represented by the following formula: CexA1-x-yByOd (in the formula, A represents a lanthanide other than Ce, B represents the additive metal element, x represents a molar fraction of Ce, y represents a molar fraction of the additive metal element, 1?x?y represents a molar fraction of a lanthanide other than Ce, x and y satisfy 0.1?x?0.9, 0.01?y?0.3, and 0.11?x+y?0.91, d represents a molar ratio of oxygen atoms, and 1.5?d?2 is satisfied); and ruthenium (Ru) supported on the composite oxide carrier.

Abstract: Provided is a catalyst that is free from catalyst deactivation caused by reaction of the support and exhibits good catalytic activity in an ammonia synthesis reaction in a low-temperature, low-pressure process. The present invention relates to an ammonia synthesis catalyst having a structure in which at least one of ruthenium or an oxide of ruthenium is loaded on a titanium suboxide support represented by the composition formula TiOx where x represents a number satisfying 1.5<x<2.0.

Abstract: An ammonia synthesis catalyst, includes a composite oxide carrier in which at least one additive metal element selected from the group consisting of titanium (Ti), zirconium (Zr), hafnium (Hf), aluminum (Al), gallium (Ga), indium (In), silicon (Si), germanium (Ge), and tin (Sn) is solid-solutionized in a composite oxide containing cerium (Ce) and a lanthanide other than Ce and having a composition represented by the following formula: CexA1?x?yByOd (in the formula, A represents a lanthanide other than Ce, B represents the additive metal element, x represents a molar fraction of Ce, y represents a molar fraction of the additive metal element, 1?x?y represents a molar fraction of a lanthanide other than Ce, x and y satisfy 0.1?x?0.9, 0.01?y?0.3, and 0.11?x+y?0.91, d represents a molar ratio of oxygen atoms, and 1.5?d?2 is satisfied); and ruthenium (Ru) supported on the composite oxide carrier.

Abstract: The present disclosure provides an ammonia synthesis catalyst including a composite oxide support containing cerium and praseodymium; and ruthenium supported on the composite oxide support, wherein a molar ratio of cerium to praseodymium ([cerium]/[praseodymium]) contained in the composite oxide support is 20/80 to 90/10.

Abstract: A ceramic filter includes a porous ceramic body which is a sintered body of ceramic particles, and a coating portion formed on a surface of each ceramic particle to support the catalyst. The porous ceramic body has a specific surface area equal to or greater than 0.5 m2/cc, measured by a mercury porosimeter, and an amount of the coating portion is equal to or greater than 15 g/l.

Abstract: A compact heat exchanger-integrated reaction device, comprising a heat exchange section and a reaction section, capable of providing high heat recovery performance, with a small number of ducts of the reaction section formed for supplying and return paths without increasing the volume of the entire reaction device. With the heat exchanger-integrated reaction device equipped with ducts in the reaction section adjacent to the plate-stacking-type heat exchange section, collection ducts for allowing a plurality of regions having openings for discharging a fluid to be processed to be connected with at least one supplying duct of the reaction section, and distribution ducts for allowing at least one supplying duct of the reaction section to be connected with a plurality of regions having openings for receiving the fluid from the heat exchange section are provided between the heat exchange section and the duct of the reaction section.

Abstract: The present invention provides a compact heat exchanger-integrated reaction device, comprising a heat exchange section and a reaction section, capable of providing high heat recovery performance, with a small number of ducts of the reaction section formed for supplying and return paths without increasing the volume of the entire reaction device. With the heat exchanger-integrated reaction device equipped with ducts in the reaction section adjacent to the plate-stacking-type heat exchange section, collection ducts for allowing a plurality of regions having openings for discharging a fluid to be processed to be connected with at least one supplying duct of the reaction section, and distribution ducts for allowing at least one supplying duct of the reaction section to be connected with a plurality of regions having openings for receiving the fluid from the heat exchange section are provided between the heat exchange section and the duct of the reaction section.

Abstract: A self-heat exchange type heat exchanger which can provide a greater heat transfer area in a limited capacity, can be easily prepared and can lead to drastic enhancement of heat exchange efficiency.