Upgrading of palm biodiesel fuel over supported palladium catalysts

Chen, Shih‐Yuan; Attanatho, Lalita; Mochizuki, Takehisa; Abe, Yohko; Toba, Makoto; Yoshimura, Y.; Kumpidet, Chiraphat; Somwonhsa, Phunthinee; Lao-ubol, Supranee

doi:10.1016/j.crci.2015.12.005

Cited by 27 publications

(38 citation statements)

References 20 publications

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“…This could facilitate the loss of Ni particles from the surface of the support compared to that in the porous catalysts. Although the amount of silica could not be detected in all H-FAMEs, Chen et al [5] reported that the amorphous nature of silica or alumina was slightly leached out under the mild hydrogenation condition. Thus, it was possible that the silica fiber having the lower degree of crystallinity than the commercial porous silica ball might have lower stability.…”

Section: Catalyst Stability Of Ni/sf and Ni/sb Catalystsmentioning

confidence: 97%

“…Thus, it was possible that the silica fiber having the lower degree of crystallinity than the commercial porous silica ball might have lower stability. According to the results obtained from the EDX analysis and the previous literature [5], the degree of crystallinity and the interaction between active metals and the surface of the silica fiber should be improved in order to increase the lifetime of the catalyst for applying in the commercialized scale of H-FAME production. Table 4 shows the properties of FAME and H-FAME at various C18:2 conversion levels, in terms of the heating value, thermal properties and oxidation stability.…”

Section: Catalyst Stability Of Ni/sf and Ni/sb Catalystsmentioning

confidence: 98%

“…This indicated that some portion of the cis-C18:1 was converted to a C18:0 configuration. Although a high saturation level is beneficial for oxidation stability, over-saturation can increase the cloud point and pour point of the obtained H-FAME, resulting in the limitation for use in cold weather areas [3,5]. Thus, a monounsaturated FAME is preferred since it can balance the properties between oxidation stability Regarding the effect of the Ni loading, the Ni/SB catalysts (Figure 6a) exhibited a maximum TOF of 141 h −1 at 30 wt% Ni content.…”

Section: Comparative Performance Of the Ni/sf And Ni/sb Catalysts Formentioning

confidence: 99%

“…In the case of reaction temperature, the partial hydrogenation of FAME was generally operated in the range of 80-200 • C depending on the type of catalyst [3,5,10]. In this work, the reaction was performed using 30 wt% Ni/SB or 30 wt% Ni/SF under 1 bar H 2 pressure.…”

Section: Comparative Performance Of the Ni/sf And Ni/sb Catalysts Formentioning

confidence: 99%

“…However, hydrogenated FAME (H-FAME) with over-saturation has inferior cold flow properties, resulting in the potential blockage of the fuel system of vehicles [3,4]. Thus, the optimum conditions for the partial hydrogenation of FAME have been investigated for each catalytic system to maximize the amount of monounsaturated structures (methyl oleate (C18: 1) and methyl palmitoleate (C16:1)) to balance the oxidation stability with the cold flow properties of H-FAME [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Partial Hydrogenation of Palm Oil-Derived Biodiesel over Ni/Electrospun Silica Fiber Catalysts

et al. 2020

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Given the high accessibility of reactants to the active metal sites of fibrous catalysts, in this research, an electrospun silica fiber was applied as a support of nickel catalysts (Ni/SF) for the partial hydrogenation of palm oil fatty acid methyl ester (FAME) in a fixed-bed reactor. The textural properties, reducibility, Ni dispersion and morphology of Ni/SF catalysts were characterized and compared to those of a Ni/porous silica ball (Ni/SB). Under 1 bar H2 pressure at 140 °C, the 30 wt% Ni/SF catalyst exhibited a high turnover frequency (TOF) of 1396 h−1 to convert methyl linoleate (C18:2) to more saturated structures. On the other hand, the system using Ni/SB catalysts showed a TOF of only 141 h−1. This result was due to the effect of the higher acidity of the silica fiber, which promoted the higher adsorption of polyunsaturated portions in FAME. The non-porous characteristics and open morphology of the Ni/SF catalysts also allowed FAME and H2 molecules to easily access the Ni active sites deposited on the surface of the silica fiber and suppressed the selectivity to cis–trans isomerization. Stability testing of the Ni/SF catalyst showed that the C18:2 conversion decreased from 71% to 60% after long-term operation for 16 h possibly due to the weak metal–support interaction that facilitated Ni particle loss from the catalyst surface.

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Section: Catalyst Stability Of Ni/sf and Ni/sb Catalystsmentioning

confidence: 97%

Section: Catalyst Stability Of Ni/sf and Ni/sb Catalystsmentioning

confidence: 98%

Section: Comparative Performance Of the Ni/sf And Ni/sb Catalysts Formentioning

confidence: 99%

Section: Comparative Performance Of the Ni/sf And Ni/sb Catalysts Formentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Partial Hydrogenation of Palm Oil-Derived Biodiesel over Ni/Electrospun Silica Fiber Catalysts

et al. 2020

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Upgrading palm biodiesel properties via catalyst‐free partial hydrogenation using needle‐plate dielectric barrier discharge plasma torch

Kamjam

Wongsawaeng

Ngaosuwan

et al. 2022

Intl J of Energy Research

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A catalyst-free and ambient condition dielectric barrier discharge (DBD) plasma torch has been used to efficaciously synthesize partially hydrogenated fatty acid methyl ester (H-FAME) obtained from refined palm oil. The electrode configuration was a needle-to-plate type. The effects of power, H 2 flow rate, discharge gap, process temperature and reaction duration on H-FAME compositions and properties were examined. For 1 hour of reaction time, the optimal condition was 100 W input power, 1.0 L/min H 2 flow rate, 1.0 cm discharge gap and 90 C reaction temperature. Under this condition, the H-FAME contained saturated FAMEs of 56.8% and unsaturated FAMEs of 43.1%, compared to saturated FAMEs of 48.8% and unsaturated FAMEs of 51.0% in the feed FAME. After 1 hour of treatment, the oxidation stability increased by 10.7 hours (from 12.8 to 23.5 hours), while the cloud point increased from 13.5 to 16.0 C. A reduction rate of iodine value was 13.4%/h (reduction from 50.6 to 43.8). The trans-fatty acid formation was not detected in the palm H-FAME.Partial hydrogenation through the DBD plasma torch without using artificial antioxidants or metal catalysts is an environment-friendly and potentially alternative approach, which can substitute conventional catalytic hydrogenation of FAME for enhancing the oxidation stability of biodiesel.

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Superficial Pd nanoparticles supported on carbonaceous SBA-15 as efficient hydrotreating catalyst for upgrading biodiesel fuel

Chen

Chang

Rungsi

et al. 2020

Applied Catalysis A: General

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Upgrading of palm biodiesel fuel over supported palladium catalysts

Cited by 27 publications

References 20 publications

Partial Hydrogenation of Palm Oil-Derived Biodiesel over Ni/Electrospun Silica Fiber Catalysts

Partial Hydrogenation of Palm Oil-Derived Biodiesel over Ni/Electrospun Silica Fiber Catalysts

Upgrading palm biodiesel properties via catalyst‐free partial hydrogenation using needle‐plate dielectric barrier discharge plasma torch

Superficial Pd nanoparticles supported on carbonaceous SBA-15 as efficient hydrotreating catalyst for upgrading biodiesel fuel

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