Advanced Fuel Research, Inc.

Andrew E Carlson

Alan D Kersey

Mark R Fernald

Michael A Davis

Michael A Serio

Joseph E Cosgrove

Marek A Wójtowicz

David O Winkowski

John V Viega

High purity carbon sorbent monoliths, particularly effective for the removal of trace-contaminants such as ammonia, formaldehyde, and methyl mercaptan from a gas flow, are fabricated by 3D-printing polymer monoliths, pre-oxidizing them in a flow of air at a temperature below the melting point of the polymer precursor, carbonizing them, and subsequently activating them to a weight loss of about 20 percent. The pre-oxidation step effectively prevents polymer-monolith swelling and melting during carbonization.

Polymer-monolith pre-oxidation to improve shape retention during subsequent heat treatment, and monolith produced

High purity carbon sorbent monoliths that are particularly effective for the adsorption and subsequent desorption of trace-contaminants, such as ammonia, are produced by 3D-printing polymer monoliths, carbonizing them, and subsequently activating them to produce an effective amount of at least one type of oxygen species on exposed carbon surfaces. The high purity carbon sorbent monoliths are vacuum-regenerable on a time scale of a few minutes.

Monolithic trace-contaminant sorbents fabricated from 3D-printed polymer precursors

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Higganum, CT, United States of America

Andrew E Carlson