off-gasn.
/ˈɒfɡas/, U.S. /ˈɔfˌɡæs/ A gas or vapour given off or released, esp. in an industrial process or from a manufactured product.
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1955 Meteorol. & Atomic Energy (U.S. Weather Bureau) i. 9/2 The radioactivity in the off-gases depends upon the age of the irradiated reactor fuel.
1966 Index Air Pollution Res. (Center for Air Environment Studies) 1 July 1 Chromatographic analytical methods as applied to pulp mill off gases.
1985 Chem. Engin. (Nexis) 21 Jan. 62 In cases where the amine treater's offgas is primarily carbon dioxide and water with very little hydrocarbons, incineration with support fuel, instead of flaring, is required.
2001 Jrnl. Air Waste Managem. Assoc. 51 895 One promising new technology for removing both NOx and VOCs from off-gas streams is biofiltration, a simple process whereby contaminated air is passed through a biologically active packed bed.
This is a new entry (OED Third Edition, March 2004; most recently modified version published online March 2022).
off-gasv.
/ˈɒfɡas/, U.S. /ˈɔfˌɡæs/ transitive. To give off or release (gas or vapour); to outgas. Also intransitive: (of a gas or vapour) to be given off or released. Cf. off-gassing n.
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the world > matter > gas > [verb (intransitive)] > emit fumes or vapour
breathec1300
fume?1533
vapour1552
steam1614
vaporate1623
rokea1700
smoke1733
outgas1962
off-gas1979
the world > matter > gas > [verb (intransitive)] > of vapour, etc.: be emitted, rise, or pass off
to stand upc1300
risea1382
exhalec1400
steam1582
fume1594
suffumigate1599
emanate1818
off-gas1979
the world > matter > gas > [verb (transitive)] > emit as fumes or vapour
vapourc1430
fume1563
exhalea1628
vaporatea1640
steam1666
outgas1971
off-gas1979
1979 Aviation, Space, & Environmental Med. 50 1007 Upon exposure to the thermal environment of an aircraft fire, many fire retardant fabrics off-gas fiber and dye degradation products.
1989 D. Pearson Nat. Houses Bk. i. ii. 49 Soft plastics are potentially more harmful, since they may offgas into stored foods.
1994 CompuServe Mag. Aug. 16/2 Avoid plywood and particle board, which contain adhesives that can ‘off-gas’, or emit harmful chemicals.
1997 Sierra Nov. 21/1 That distinctive ‘new-carpet’ aroma is the odor of 4-PC off-gassing.
This is a new entry (OED Third Edition, March 2004; most recently modified version published online March 2022).
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n.1955
v.1979