Hydrogenation of Vegetable Oils with Minimum trans and Saturated Fatty Acid Formation Over a New Generation of Pd-catalyst

Abstract

Hydrogenation of sunflower and canola oils over a novel Pd-supported catalyst (pore size of 6.8 nm and BET specific surface area of 837 m 2 /g) was investigated and compared to commercial nickel catalyst. The formulated catalyst with Pd-loading of 1 wt%, supported on structured silica material was active and selective for the hydrogenation of sunflower and canola oils under mild process conditions. For both oils, the novel Pd supported catalyst exhibited a better selectivity than commercial Ni catalyst at a similar activity with a lower metal loading. For the same iodine value (IV) reduction, the Pd-catalyst produced less saturated fatty acids (SFA) and about the same level of trans fatty acids (TFA), but was more selective towards cis monoenes formation than Ni-catalyst. More importantly, this catalyst produced a reduced level of stearic acid, which at increased levels causes waxy mouth feel of the hydrogenated fat.

Varied Thermal Chemistry of Hydrocarbons on Nickel Single-Crystal Surfaces

“…For instance, selective (rather than extensive and uncontrolled) hydrogenolysis may be engineered with certain feedstocks, in, for instance, the conversion of aromatic compounds with side aliphatic chains. Tuning the selectivity between hydrogenation and dehydrogenation steps (by, for instance, choosing the appropriate hydrogen pressure) may open new avenues for the use of nickel as a catalyst to promote the isomerization of olefins and other unsaturated hydrocarbons, a reaction typically catalyzed with more expensive (Pt, Pd, Rh) metals [78,79]. Even chain-growth processes may be possible; typically, nickel is used as a methanation catalyst but other metals are chosen when chain growth is desired, as in the FischerTropsch process [80,81].…”

Selectivity in sorption and hydrogenation of methyl oleate and elaidate on MFI zeolites

“…elaidate (tC18:1), are legally restricted for dietary reasons [3][4][5]. Main efforts from industry to obtain products low in trans include: (1) changes of the hydrogenation parameters [2,6], (2) use of noble metal catalysts containing Pt and Pd [7,8], (3) use of catalytic transfer [9,10], electrocatalytic hydrogenation [11][12][13] and hydrogenation in supercritical conditions [14][15][16][17], (4) use of alternative processes and feeds, including chemical [18,19] and enzymatic interesterification [20], fractionation [21], and (5) use of naturally stable oils low in linolenic acid [22,23].…”

Pflanzenöle für die chemische Industrie

“…Als Katalysatoren werden damals wie heute hauptsächlich Nickelverbindungen verwendet. Neu entwickelte Katalysatoren, etwa auf Pd‐Basis, minimieren die Menge an trans‐Fettsäuren in den Produkten 5). Das verringert die Bildung von LDL‐Cholesterol und beugt so koronaren Herzerkrankungen vor.…”