Catalytic cracking of palmitic and oleic acids pre-adsorbed on γ-alumina

Fast Catalytic Pyrolysis of Dilaurin in the Presence of Sodium Carbonate Alone or Combined with Alumina

“…This hypothesis was supported by the discrete presence of the products (10), (11), (13), (14), (15) and (16) under condition D-12:0/Al 2 O 3 , ( Figure 5, zoom (A) and (B), black line) and the largest global area of light products, with 1-decene (4) being the most abundant ( Figure 5, zoom (C)). These results were in good agreement with literature observations [8,20,21].…”

“…In the case of all pyrolysis experiments performed with γ-alumina, D-12:0 was fully converted, and produced 68.5% of hydrocarbons (C3 to C13). In the same conditions using Na2CO3, only 41.3% of hydrocarbons (also C3 to C13) were obtained, confirming that γ-alumina is an efficient catalyst for the deoxygenation of oily compounds [7,8,[19][20][21]. However, the nature of the products was not similar under the two conditions showed in Figures 4 and 5, nor their relative quantities.…”

“…After the addition of the alumina layer some 1-alkenes were isomerized, forming for example internal olefins such as (Z)-2-decene and (E)-2-decene (compounds 20 and 21, Figure 5, Zoom C). The acidic properties of alumina [28] are known to favor isomerization, cyclization [18] and eventually aromatization reactions [20] under such pyrolysis conditions.…”

“…The present work aimed to study the products of fast catalytic pyrolysis of a model diglyceride, glycerol didodecanoate (dilaurin, D-12:0), in the presence of sodium carbonate, investigating its potential for dilaurin conversion and deoxygenation. The performance of sodium carbonate was compared to that of an alumina (γ-alumina) catalyst, used in former studies of fatty compounds catalytic pyrolysis [5,7,8,[19][20][21]. A synergic effect of both materials was observed by Imran et al [22], using alumina-supported sodium carbonate catalyst for lignocellulosic biomass pyrolysis.…”

Performance of Activated Carbon Supported Cobalt Oxides and Iron Oxide Catalysts in Catalytic Cracking of Waste Cooking Oil

“…The highest selectivity towards n-(C 15 + C 17 ) hydrocarbons obtained by Co-Fe/AC catalysts was lower than that attained by Co/AC and Fe/ AC catalysts (>50 %). This implies that Co-Fe/AC catalysts induced extensive cracking of the deoxygenated product to generate short-chain hydrocarbons [22]. High Co loading was found to increase cracking activities, for instance using 10Co-5Fe/AC catalyst displayed 72 % selectivity towards lighter hydrocarbons (C 5 -C 14 ) with lower C 15 and C 17 hydrocarbons selectivity (22 %).…”