Hydrocarbon adsorbent and method for adsorbing hydrocarbons
AssigneeTosoh Corporation
InventorsToyohiro Usui, Keita Nakao
Life of this patent
Estimating the term…
Abstract
A hydrocarbon adsorbent having a high hydrocarbon desorption start temperature and a method for adsorbing hydrocarbons that uses the hydrocarbon adsorbent are provided. The hydrocarbon adsorbent includes an alkali metal and a zeolite having a ring structure that includes at least 10 members is used. In the hydrocarbon adsorbent, a content of the alkali metal is 1 to 40 mass % based on a total mass of the hydrocarbon adsorbent, a content of the zeolite having a ring structure that includes at least 10 members is 99 to 60 mass % based on the total mass of the hydrocarbon adsorbent, and at least a portion of the alkali metal is in a state of being ion-exchangeable.
Claims6
A hydrocarbon adsorbent comprising:
- an alkali metal;
- and
- a zeolite having a ring structure that includes at least 10 members selected from at least one of a BEA zeolite, an FAU zeolite, or an MOR zeolite, wherein
- a content of the alkali metal is 1 to 40 mass % based on a total mass of the hydrocarbon adsorbent,
- a content of the zeolite having a ring structure that includes at least 10 members is 99 to 60 mass % based on the total mass of the hydrocarbon adsorbent,
- at least a portion of the alkali metal is in a state of being ion-exchangeable,
- wherein a content of the alkali metal that is in a state of being ion-exchangeable is 1 mass % or more and 40 mass % or less based on the total mass of the hydrocarbon adsorbent,
- the zeolite has a molar ratio of silica to alumina (SiO2/Al2O3 ratio) of 5 or more and 20 or less, and the hydrocarbon adsorbent exhibits a desorption start temperature of from 180° C. to less than 200° C.
Dependencies are inferred from the claim text.