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US 12,491,490 B2Granted
Evaporative emission control articles including activated carbon
AssigneeBASF Mobile Emissions Catalysts LLC
InventorsChen Chen, Wolfgang Ruettinger, Steven Chin, Laif R. Alden, Akash Abraham
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Abstract
The present disclosure relates to hydrocarbon emission control systems. More specifically, the present disclosure relates to substrates coated with hydrocarbon adsorptive coating compositions and evaporative emission control systems for controlling evaporative emissions of hydrocarbons from motor vehicle engines and fuel systems.
Claims20
A bleed emission scrubber, the scrubber comprising:
- no more than one adsorbent volume comprising a coated substrate adapted for hydrocarbon adsorption, the coated substrate comprising a substrate having at least one surface, and a coating on the at least one surface, the coating comprising particulate carbon and a binder,
- wherein the adsorbent volume has a g-total butane working capacity (BWC) of 0.1 grams to less than 2 grams, the g-total BWC being computed based on the total scrubber adsorbent volume and ASTM D5228 as of Jul. 16, 2018,
- wherein the particulate carbon has a BET surface area of at least about 1300 m2/gram,
- wherein the particulate carbon has at least one of:
- i. a butane affinity of greater than 60% at 5% butane;
- ii. a butane affinity of greater than 35% at 0.5% butane;
- or
- iii. a micropore volume greater than about 0.2 ml/g and a mesopore volume greater than about 0.5 ml/g.
5 more elements
Dependencies are inferred from the claim text.