Hydrogen sulfide scavenging additive composition and method of use thereof

A composition for scavenging hydrogen sulfide, wherein the composition comprises:

• (a) a hydrocarbon comprising sulfur containing compounds;
• and
• (b) a hydrogen sulfide scavenging additive composition;
• wherein the hydrogen sulfide scavenging additive composition consists of a combination of:
• (A) glyoxal;
• and
• (B) at least one aliphatic tertiary amine or oxide treated derivative thereof, or a mixture of the aliphatic tertiary amine and the oxide treated derivative thereof;
• wherein the aliphatic tertiary amine or the oxide treated derivative thereof is selected from the group consisting of:
• (i) N,N,N′,N′-Tetrakis (2-hydroxyethyl) ethylene-diamine (THEED);
• (ii) N,N,N′,N′ tetrakis (2-hydroxypropyl) ethylene-diamine;
• (iii) ethylene oxide (EO) derivative of tri-isopropanolamine (EO-TIPA);
• (iv) propylene oxide (PO) derivative of tri-isopropanolamine (PO-TIPA);
• (v) ethylene oxide (EO) derivative of triethanolamine (EO-TEA);
• (vi) propylene oxide (PO) derivative of triethanolamine (PO-TEA);
• and
• (vii) a mixture thereof;
• wherein the composition does not comprise:
• i) triethanolamine (TEA);
• ii) monoethanolamine (MEA);
• iii) diethanolamine (DEA);
• and
• iv) tetraethylenepentaamine (TEPA).