Abstract:
Provided is an air conditioner 100 used in a space R containing a gas having a concentration of carbon dioxide of 5000 ppm or less, the air conditioner 100 including a flow path 10 connected to the space R, in which a removal section 10c for removing carbon dioxide contained in the gas is disposed in the flow path 10, an adsorbent 80 containing cerium oxide is disposed in the removal section 10c, and the carbon dioxide adsorbs on the adsorbent 80 as the adsorbent 80 comes into contact with the gas.
Abstract:
Provided is a method for producing an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the method including a firing step of firing a raw material containing at least one kind of cerium salt selected from the group consisting of a carbonate of cerium and a hydrogencarbonate of cerium.
Abstract:
Provided is a carbon dioxide capturing material that captures a large amount of carbon dioxide, less suffers from decrease in an amount of the captured carbon dioxide even after firing, and has excellent heat resistance. The carbon dioxide capturing material separates and recovers carbon dioxide from a carbon-dioxide-containing gas. The capturing material includes an oxide containing Ce and Al. The oxide contains Ce in a highest content among metal elements in the oxide and contains Al in a content of 0.01% by mole to 40% by mole.
Abstract:
Provided is an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the adsorbent containing cerium oxide containing cerium and a metallic element (excluding cerium) having an electronegativity of 1.00 or more.
Abstract:
A CO2 removal device includes: a CO2 capturing material which captures H2O and CO2 in a gas; a reaction container which contains the CO2 capturing material; an H2O measuring unit for measuring the concentration of H2O in the gas; an H2O concentration adjustment device which adjusts the concentration of H2O on the basis of information obtained by the H2O measuring unit; a gas introduction path introducing the gas into the reaction container from the H2O concentration adjustment device and bringing the gas into contact with the CO2 capturing material; a first gas discharge path discharging the gas from the reaction container after the gas has been brought into contact with the CO2 capturing material; and a second gas discharge path discharging the gas that has been desorbed from the CO2 capturing material from the reaction container. The CO2 removal device allows for the reduction of energy consumption in removing CO2.
Abstract:
Provided is an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the adsorbent containing cerium oxide and has a pore diameter having a differential pore volume of 0.0085 cm3/g-Å or more in a region where a pore diameter is 7 Å or less in pore distribution measured by Horvath-Kawazoe method.
Abstract:
Provided is an adsorbent used for removing carbon dioxide from a gas comprising carbon dioxide, the adsorbent comprising a cerium oxide and having an average pore diameter of 50 nm or less, the average pore diameter measured by the BET method using argon gas as an adsorption gas.
Abstract:
A carbon dioxide removal device 100 that include an adsorbent 1 and a reaction vessel 10 that have the adsorbent 1 installed therein, and that brings a gas to be treated containing carbon dioxide into contact with the adsorbent 1 and thereby removes carbon dioxide from the gas, in which the carbon dioxide removal device 100 further includes a water adjustment unit 20 that supplies water to the reaction vessel 10 and discharges water from the reaction vessel 10.
Abstract:
Provided is a method for producing an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the method including a reaction step of reacting a mixture containing tetravalent cerium and at least one kind selected from the group consisting of urea, a urea derivative and an amide compound.
Abstract:
Provided is an adsorbent used for removing carbon dioxide from a gas containing carbon dioxide, the adsorbent containing cerium oxide, in which a lattice constant of the cerium oxide is 0.5415 nm or more.