Low emissions, high working capacity adsorbent and canister system
OwnerLaurence H. Hiltzik, James R. Miller +4inventors
InventorsLaurence H. Hiltzik, James R. Miller, Roger S. Williams, Cameron I. Thomson, Michael G. Heim, Emma M. Card
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Abstract
The present description provides high working capacity adsorbents with low DBL bleed emission performance properties that allows the design of evaporative fuel emission control systems that are lower cost, simpler and more compact than those possible by prior art. Emission control canister systems comprising the adsorbent material demonstrate a relatively high gasoline working capacity, and low emissions.
Claims38
A shaped adsorbent material comprising an admixture of a binder and an activated adsorbent powder prepared by grinding an activated adsorbent precursor, wherein the admixture is shaped into a form, and wherein the shaped adsorbent material has an ASTM BWC of at least 13 g/dL.
An evaporative emission control canister system comprising at least one adsorbent volume, and including a shaped adsorbent material comprising an admixture of a binder and an activated adsorbent powder derived by grinding an activated adsorbent precursor, wherein the admixture is shaped into a form, and wherein the shaped adsorbent material has an ASTM BWC of at least 13 g/dL.
A shaped adsorbent material produced according to the steps comprising:
- a. providing an activated adsorbent precursor;
- b. grinding the activated adsorbent precursor to a powder, wherein the powder has a pBACT of at least about 50 g/100 g;
- c. admixing the powder with a binder material;
- and
- d. shaping the powder and binder material mixture into a form, wherein the shaped adsorbent material has an ASTM BWC of at least 13 g/dL.
Dependencies are inferred from the claim text.