Hydroprocessing of Jatropha Oil for Production of Green Diesel over Non-sulfided Ni-PTA/Al2O3 Catalyst

Abstract

The non-sulfided Ni-PTA/Al2O3 catalyst was developed to produce green diesel from the hydroprocessing of Jatropha oil. The Ni-PTA/Al2O3 catalyst was prepared by one-pot synthesis of Ni/Al2O3 with the co-precipitation method and then impregnanting Ni/Al2O3 with PTA solution. The catalysts were characterized with BET, SEM-EDX, TEM, XRD, XPS, TGA and NH3-TPD. The Ni and W species of the Ni-PTA/Al2O3 catalyst were much more homogeneously distributed on the surface than that of commercial Al2O3. Catalytic performance in the hydroprocessing of Jatropha oil was evaluated by GC. The maximum conversion of Jatropha oil (98.5 wt%) and selectivity of the C15-C18 alkanes fraction (84.5 wt %) occurred at 360 °C, 3.0 MPa, 0.8 h−1. The non-sulfided Ni-PTA/Al2O3 catalyst is more environmentally friendly than the conventional sulfided hydroprocessing catalyst, and it exhibited the highest catalytic activity than the Ni-PTA catalyst supported with commercial Al2O3 grain and Al2O3 powder.

NiO-PTA supported on ZIF-8 as a highly effective catalyst for hydrocracking of Jatropha oil

“…Some literature has obtained encapsulation of phosphotungstic acid (PTA) into the MOF, such as MIL-101 53 , MIL-100(Fe) 54 , HKUST-1 Cu 3 (BTC) 2 55 and Fe-EMOF 56 . In our previous work, we found that PTA combined with Ni/Al 2 O 3 , Ni/hydroxyapatite and flower-like NiO can be used as effective bifunctional catalysts for the hydrocracking of plant oil 57 58 59 . The PTA supplies the metal sites (W oxide species) and also provides acid sites for isomerization.…”

Selective Hydrodeoxygenation of Vegetable Oils and Waste Cooking Oils to Green Diesel Using a Silica‐Supported Ir–ReOx Bimetallic Catalyst

“…In addition, the Ir–ReO x /SiO 2 catalyst gives alkanes with higher selectivity and slightly higher yields than that reported for a Ru/HAP catalyst (Table S2 in the Supporting Information) under comparable reaction conditions (Table S2, entries 26 and 27, in the Supporting Information). Furthermore, our reaction temperature (453 K) is much lower than those used in prior studies (≥523 K) over Ni, Mo, Fe, and Ru‐based catalysts, underscoring the effectiveness and high selectivity of Ir–ReO x /SiO 2 for the HDO of vegetable oils and WCO.…”

“…Sulfided Ni–Mo and Co–Mo are conventional hydrotreating catalysts, but harsh reaction conditions and sulfide leaching into alkanes hinder their application. Supported transition‐metal catalysts containing Ni, Fe, Ru, Pt, and Mo carbides have been used for the HDO of oils. The latter catalysts required harsh reaction conditions (>523 K and 5 MPa H 2 ) to achieve reasonable performance and also caused some carbon loss because decarboxylation and/or decarbonylation of fatty acids and esters are favored at high temperatures.…”

Selective Hydrodeoxygenation of Vegetable Oils and Waste Cooking Oils to Green Diesel Using a Silica-Supported Ir-ReO x Bimetallic Catalyst

“…In contrast, WCO conversion results in only 21 wt %y ield of diesel-range alkanes in 3h (entry 5, Table 3). 523 K) [21][22][23][24][25][26][27][28][29][30] over Ni, Mo, Fe, and Ru-based catalysts, underscoring the effectiveness and high selectivity of Ir-ReO x /SiO 2 for the HDO of vegetable oils and WCO. The HDO activity of Ir-ReO x /SiO 2 has been reported to be severely deactivated by alkali metal and alkali earth metal cations such as Na + and Ca 2 + .…”

“…The catalytic hydrotreatingo fvege-table oils over zeolites, such as HZSM-5, to produce gasoline and diesel is an alternative strategy. Supported transitionmetal catalysts containing Ni, [21][22][23][24][25][26] Fe, [27] Ru, [28] Pt, [29] and Mo carbides [30] have been used for the HDO of oils. Hydrodeoxgenation (HDO)o f vegetable oils and WCO into long-chain hydrocarbons (C 12 -C 22 ) with high conversion and high selectivity is the most attractive strategy.…”