A review on partial hydrogenation of biodiesel and its influence on fuel properties

Adu-Mensah, Derick; Mei, Deqing; Zuo, Lei; Zhang, Qi; Wang, Junfeng

doi:10.1016/j.fuel.2019.04.036

Cited by 83 publications

(74 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Soot elimination from a compression-ignition engine can also be done by use of catalytic converters that affect combustion chemistry and the efficiency of this process [10]. Very interesting seems to be hydrogen as a fuel without carbon in its structure and thus not generating carbon dioxide in the combustion process [11]. A hydrogen cannot be used alone as a fuel for the compression-ignition engine due to the high value of the auto-ignition temperature [12,13].…”

Section: Introductionmentioning

confidence: 99%

Combustion and Emission Characteristics of a Biodiesel-Hydrogen Dual-Fuel Engine

2020

View full text Add to dashboard Cite

The paper presents the results of co-combustion of biodiesel with hydrogen in a compression-ignition internal combustion engine. The tests were carried out on a stationary engine with constant settings. The paper presents the results of the assessment of the combustion process, combustion stability and exhaust emissions in a dual-fuel diesel engine fueled with biodiesel and hydrogen. It was found that it is possible to replace biodiesel with hydrogen to its energetic share of 38%. The share of hydrogen in the co-combustion process causes a change in combustion phases and reducing the duration of combustion. The increase of the engine thermal efficiency was obtained with the increase of the H2 share. A different character of heat release rate was obtained compared to a conventional engine. The reduction in the diffusion combustion phase has contributed to a significant reduction in soot emissions. The maximum 38% of hydrogen energy share acceptable by the engine, resulted in a more than 25-times reduction in soot emissions. The combustion stability assessed on the basis of the unrepeatability of the indicated mean effective pressure (COVIMEP) index and also on the basis of the indicated mean effective pressure (IMEP) normal distribution was also analyzed.

show abstract

Section: Introductionmentioning

confidence: 99%

Combustion and Emission Characteristics of a Biodiesel-Hydrogen Dual-Fuel Engine

2020

View full text Add to dashboard Cite

show abstract

“…Despite all the merits of biodiesel, it is more susceptible to oxidation in comparison with petroleum-based diesel when exposed to air, daylight, high-temperature conditions and metal contaminants [4,5]. However, biodiesel's level of oxidation depends on the type and location of feedstock, storage conditions and natural occurrence of antioxidants [4][5][6][7]. Various studies have addressed the issue of biodiesel oxidation stability based on different feedstock.…”

Section: Introductionmentioning

confidence: 99%

“…Various studies have addressed the issue of biodiesel oxidation stability based on different feedstock. They concluded that high unsaturated fatty acid content of esters is the primary reason for the susceptibility of biodiesel to oxidation [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…The presence of these products affects biodiesel quality and impairs the performance of engines. Besides, they result in injector fouling, plugging of fuel filters, and the formation of deposits in the engine combustion chamber and other fuel system components, which in turn damages the vehicle fuel systems [4,5,7,9]. Most of the available literature has reported the oxidation stability of edible oil-derived biodiesel [6].…”

Section: Introductionmentioning

confidence: 99%

“…The study, however, did not evaluate the effectiveness of the antioxidants on biodiesel stability during long-term storage under different conditions. Biodiesel typically contains limited amounts or no natural antioxidants at all, they become less stable over time; therefore, antioxidants need to be applied to the biodiesel during long-term storage [7,12]. Rutto and Enweremadu [13] employed response surface methodology to optimize the production variables of biodiesel synthesized from manketti nut oil.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Storage and thermal stability of biodiesel produced from manketti nut oil of Southern Africa origin with the influence of metal contaminants and antioxidants

Kivevele

2020

SN Appl. Sci.

View full text Add to dashboard Cite

Biodiesel has widely been produced from common edible oils; however, food versus fuel conflicts has motivated researchers to search for other less common feedstock for production of biodiesel. Thus, this study investigates the suitability of biodiesel made from less common manketti nut oil in terms of its thermal and long-term storage stability. Also, since biodiesel is stored in containers made of different metals; the influence of metal contaminants on the storage stability of biodiesel is also examined. Manketti Oil Methyl Ester (MOME) is synthesized by the transesterification process and characterized as per biodiesel global standards. MOME is doped with antioxidants (1, 2, 3 tri-hydroxy benzene (Pyrogallol, PY) and 3, 4, 5-tri hydroxy benzoic acid (Propyl Gallate, PG)) at different ratio to analyse its influence on the stability of MOME. Also, 2 ppm of selected metals (Co, Cu, Fe, Mn, and Ni) is doped to MOME samples with and without antioxidants and stored for 6 months in open and closed 500 ml plastic bottles. Oxidation stability is measured once a month to monitor stability of MOME. Thermogravimetric analysis is conducted to examine thermal stability of MOME. The results show that freshly-synthesized MOME has oxidation stability of 4.24 h below the European EN 14214 (8 h) and South African SANS 1935 (6 h) standards. On adding antioxidant PY and PG at 200 ppm concentration, the oxidation stability increases to 13 h and 8.5 h respectively. The result of MOME contaminated with metals shows that Cu has the highest damaging effects on oxidation stability during storage. Additionally, thermal stability analysis results exhibit that MOME has excellent thermal stability of 211.33 °C.

show abstract

Oxidative stability of biodiesel: recent insights

Longanesi

Pereira

Johnston

et al. 2021

Biofuels Bioprod Bioref

View full text Add to dashboard Cite

Biodiesel, the fatty acid methyl ester (FAME) of vegetable and animal oil, is now used extensively worldwide, with blends of up to 7% common. The blending level is still somewhat limited due to a perceived susceptibility of these fuels to oxidation. Oxidation follows a number of pathways, with the primary mechanism being auto-oxidation, a radical process that results in the production of a range of oxygenated components. These eventually increase the viscosity of the fuel and form deposits detrimental to operation. Further fuel properties are also heavily reliant on the level of oxidation. As such, one of the main challenges in the use of biodiesel is its long-term instability when stored. Typically synthetic antioxidants have been used to address this issue; however, these systems can also add to the formation of deposits, as well as hazardous emissions, on combustion. Recently, research has focused on novel antioxidant development mainly from plant extracts, although there are a number of other routes for improved performance, including the commercialization of hydrogenated vegetable oil (HVO), a prominent alternative to FAME-based biodiesel due to its higher stability, straight chain paraffin composition, and better cold flow properties. In this review, the factors that promote this oxidation are presented, including molecular composition, metal contamination, temperature and light exposure, as well as the latest findings on the inclusion of HVO, the current state-of-the-art analytical techniques employed, and the impact of higher pressure injection systems on vehicles that demonstrate deposit formation is not solely due to the unsaturated biodiesel components.

show abstract

A review on partial hydrogenation of biodiesel and its influence on fuel properties

Cited by 83 publications

References 56 publications

Combustion and Emission Characteristics of a Biodiesel-Hydrogen Dual-Fuel Engine

Combustion and Emission Characteristics of a Biodiesel-Hydrogen Dual-Fuel Engine

Storage and thermal stability of biodiesel produced from manketti nut oil of Southern Africa origin with the influence of metal contaminants and antioxidants

Oxidative stability of biodiesel: recent insights

Contact Info

Product

Resources

About