Catalytic hydrodeoxygenation of triglycerides: An approach to clean diesel fuel production

Ameen, Mariam; Azizan, Mohammad Tazli; Yusup, Suzana; Ramli, Anita; Yasir, Madiha

doi:10.1016/j.rser.2017.05.268

Cited by 165 publications

(103 citation statements)

References 134 publications

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“…Recently, many researches on the synthesis of alkanes from carboxylic acids and their esters were reported because alkanes produced from fatty acids can be regarded as biomass‐derived fuels. Excellent reviews for the decarboxylation of carboxylic acids have been already published …”

Section: Introductionmentioning

confidence: 99%

“…Excellent reviews for the decarboxylation of carboxylic acids have been already published. [11,12] Recently, development of heterogeneous catalysts for hydrogenation of carboxylic acids seems to be remarkable, which will be due to high requirement from industrial sides. There are excellent reviews for heterogeneous catalysts [13][14][15][16] as well as homogeneous catalysts, [17][18][19] and the details of the history for heterogeneous catalysts have been already reviewed.…”

Section: Introductionmentioning

confidence: 99%

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Recent Developments of Heterogeneous Catalysts for Hydrogenation of Carboxylic Acids to their Corresponding Alcohols

2020

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Hydrogenation of carboxylic acids is an important organic reaction for the synthesis of alcohols, aldehydes, alkanes, and so on. Selective hydrogenation of carboxylic acids to alcohols is particularly important because alcohols are useful and valuable chemicals. However, the hydrogenation of carboxylic acids is difficult due to the low reactivity of the carboxy group and the acidic property, which require rational design of catalysts. Up to now, various effective homogeneous and heterogeneous catalysts have been intensively developed, and remarkable advances have been made in heterogeneous catalysts. In this minireview, recent progress (2010 and after) on the development of heterogeneous catalysts for hydrogenation of carboxylic acids to alcohols, particularly for monocarboxylic acids to mono primary alcohols, is reviewed. The reported literatures were categorized in terms of catalyst systems, such as monometallic catalysts and bimetallic catalysts. The characteristics, particularly the structure of active sites, reaction mechanism and stability, were introduced.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent Developments of Heterogeneous Catalysts for Hydrogenation of Carboxylic Acids to their Corresponding Alcohols

2020

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“…With the process of economic globalization, the energy demand is increasing in human society [1]. The development of non-renewable energyhasnot fully met the developmentneeds of industry and society [2,3]. Therefore, finding a reliable alternative energy product is imminent.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Composition and Structure of the Mesoporous Ni/KIT-6 Catalyst on Catalytic Hydrodeoxygenation Performance

et al. 2019

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A series of Ni/KIT6 catalyst precursors with 25 wt.% Ni loading amount were reduced in H 2 at 400, 450, 500, and 550 • C, respectively. The studied catalysts were investigated by XRD, Quasi in-situ XPS, BET, TEM, and H 2 -TPD/Ranalysis methods. It was found that reduction temperature is an important factor affecting the hydrodeoxygenation (HDO) performance of the studied catalysts because of the Strong Metal Support Interaction Effect (SMSI). The reduction temperature influences mainly the content of active components, crystal size, and the abilityfor adsorbing and activating H 2 . The developed pore structure and large specific surface area of the KIT-6 support favored the Ni dispersion. The RT450 catalyst, which was prepared in H 2 atmosphere at 450 • C, has the best HDO performance. Ethyl acetate can be completely transformed and maintain 96.8% ethane selectivity and 3.2% methane selectivity at 300 • C. The calculated apparent activation energies of the prepared catalysts increased in the following order: RT550 > RT400 > RT500 > RT450.

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“…At present, the only renewable materials considered for the substitution of diesel fuel are vegetable oils or animal fats used as biofuel, and the main existing technology to obtain biodiesel is based on the transesterification of triglycerides with methanol to obtain fatty acids methyl esters (FAME). Different alternative processes have been proposed, such as dilution of the vegetable oils, emulsification, pyrolysis, and hydrotreating [5]. However, nowadays, the industrial production of biodiesel is carried out by homogeneous alkali-catalyzed transesterification of vegetable oils with methanol [1].…”

Section: Introductionmentioning

confidence: 99%

“…However, nowadays, the industrial production of biodiesel is carried out by homogeneous alkali-catalyzed transesterification of vegetable oils with methanol [1]. After the reaction, biodiesel is recovered by repeated washing with water to remove glycerol, soap, and excess methanol [5][6][7]. Nevertheless, the generation of glycerol as a byproduct is a major issue, because a high amount of water must be employed to remove it.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Lipases from Wild Microbial Strains as Biocatalysts in Biodiesel Production

Luna

Bautista

et al. 2018

Separations

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In this study, the evaluation of the catalytic behavior of several wild bacterial strains in the 1,3-selective ethanolysis of triglycerides with ethanol to produce a new type of biodiesel (Ecodiesel) that integrates glycerol as monoacylglycerols was carried out. The Ecodiesel production not only avoids the elimination of glycerol, which is largely generated as a by-product in the biodiesel industry, but also results in an increase in the biofuel yield. The wild microbial strain samples were obtained from several lipophilic organisms. In addition to evaluate the enzymatic extracts, the minimum grade of purification of the strains, necessary to obtain similar results to those attained with commercial lipases was studied. This purification treatment included a dialysis followed by a lyophilization process. Such extracts were directly used as biocatalysts in the transesterification reaction of sunflower oil with ethanol, attaining much better results (yield close to 100%) than those obtained with strains which were not submitted to the purification process (yields lower than 10%). Furthermore, the results here obtained are similar to those obtained with commercial lipases but were achieved under mild conditions and lower reaction time (2 h). In addition, the stability of the enzymatic extracts was corroborated by subsequent reactions, showing no loss of activity. Thus, this study brings to light that enzymatic extracts obtained by a very simple purification process can be economically competitive with the conventional biodiesel production methods.

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Catalytic hydrodeoxygenation of triglycerides: An approach to clean diesel fuel production

Cited by 165 publications

References 134 publications

Recent Developments of Heterogeneous Catalysts for Hydrogenation of Carboxylic Acids to their Corresponding Alcohols

Recent Developments of Heterogeneous Catalysts for Hydrogenation of Carboxylic Acids to their Corresponding Alcohols

Effect of Surface Composition and Structure of the Mesoporous Ni/KIT-6 Catalyst on Catalytic Hydrodeoxygenation Performance

Evaluation of Lipases from Wild Microbial Strains as Biocatalysts in Biodiesel Production

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