Os Combustíveis Verdes Do Brasil - Avaliação Da Lubricidade Do Biodiesel B5 E Óleos De Mamona E Coco

Farias, Aline Mendes; Santana, Jaciana Silva; Filho, Manoel Fernandes Oliveira; Santana, Janaina Silva de; Barbosa, Cleiton Rubens Formiga; Medeiros, João Telésforo Nóbrega de

doi:10.15628/holos.2011.453

Cited by 6 publications

(8 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In order to reduce the emission of pollutants from diesel oil, biodiesel is added to it, which can also increase its lubricity. From the tribological point of view, the lubricity of biodiesel and the lifetime of fuel supply line are correlated 8 . The lubricity is defined by the ability to reduce friction and wear on surfaces under load and relative motion.…”

Section: Introductionmentioning

confidence: 99%

Micro and nanometric wear evaluation of metal discs used on determination of biodiesel fuel lubricity

2014

View full text Add to dashboard Cite

The contact of diesel fuel with engine subsystems demands a good wear resistance. Lubricity is an important feature for integrity of injection system and the sulphur composites are primarily responsible for lubrication of the injector nozzle. Biodiesel is responsible for partially restoring the lubricity of diesel fuel that presents low levels of sulphur composites and, furthermore, it causes less pollution than diesel fuel. The lubricity is measured through the wear scar diameter following the ASTM D 975 standards. However, the friction and wear with light loads of micro/nanocomponents are highly dependent on surface interactions that can be evaluated by microscopy techniques. This study aimed to measure and to analyze the biodiesel lubricity and their blends (B5, B20) with diesel by observing the wear scars of discs using the scanning electronic microscopy (SEM), atomic force microscopy (AFM) and micro roughness techniques. The fuels performance was evaluated using HFRR tribometer. The tests conditions were based on standard ADTM D-6079-04. The coefficient of friction was measure during the test. After the test, the worn ball and disc were analyzed by SEM, AFM and profilometer. The results showed that the addition of biodiesel in diesel improve the tribological performance of fuel. Also, the just WSD value is not sufficient to evaluate the lubrication ability of a fuel. Analysis of the worn disc surfaces proved to be compatible with WSD number and also more sensitive to these kinds of fuels, showing mainly the form and intensity of the wear.

show abstract

Section: Introductionmentioning

confidence: 99%

Micro and nanometric wear evaluation of metal discs used on determination of biodiesel fuel lubricity

2014

View full text Add to dashboard Cite

show abstract

“…7, it was possible to observe that the biodiesel obtained through coconut oil before the engine showed satisfactory results, within the range of 3.0 to 6.0 mm² s -1 of the NBR 4 . Only the biodiesel obtained from coconut oil with methanol showed below-expected value, which is detrimental since lubricant that has low viscosity may not sufficiently protect engine parts, increasing parts wear, causing more friction and oxidizing faster, as explained by Farias et al 5 . .…”

Section: Validation Of the Lubrication Property Of The Lubricants In mentioning

confidence: 96%

“…In addition to using biodiesel as fuel, it can also be used as lubricant. When it acts as a lubricant, it performs much better than commercial lubricants, due to its high lubricating power, higher viscosity and less wear on the engine parts 5 .…”

Section: C=o Of Carbonyl C-o Of Estermentioning

confidence: 99%

“…8, it was possible to observe that the biodiesel obtained through castor oil was within the limits of standard legislation 4 , except for biodiesel from castor oil with ethanol, which presented a value above the limit of 6.0 mm² s -1 . A viscosity above the limit is detrimental because some parts of the engine do not receive the necessary flux to form the lubricating film, which can result in more wear, accelerating the oxidation and shortening the life of the equipment, as explained by Farias et al 5 . Regarding the biodiesel analyzed after the engine, the kinematic viscosity values increased, but not excessively, as expected.…”

Section: Validation Of the Lubrication Property Of The Lubricants In mentioning

confidence: 99%

See 1 more Smart Citation

Study of the properties of lubricating oils obtained from biodiesel

2020

View full text Add to dashboard Cite

In this work, nine different biodiesels were obtained by transesterification reaction with three types of vegetable oils and three variant alcohols. The objective was to analyze them physicochemically before and after they went to the engine, to know if they had the necessary properties to act as lubricants. Subsequently, the same biodiesels were analyzed in the engine in order to observe the behavior of their dynamic viscosities, to evaluate if they were similar or superior to commercial lubricants. It was possible to note that all biodiesel produced are within the National Agency for Petroleum, Natural Gas and Biofuels (ANP) legislation and presented as potential lubricants, due to the kinematic viscosity behavior when compared before and after the engine. These results made them possible replacements for commercial lubricants, besides having greater advantages for the engine and the environment. However, although coconut oil-derived biodiesel has good yields, it is not promising because, at temperatures below 25 °C tends to solidify, causing short, medium- and long-term engine parts wear.

show abstract

“…Coconut crop is extremely important for the supply of raw materials for food industry and crafts (Fontenele, 2005;Jeronimo and Silva, 2013) and, recently, feasibility studies of the use of coconut fruits for biodiesel production have been done (Araújo et al, 2009;Farias et al, 2011). Coconut water and copra are consumed in natura and the consumption of the first one has increased because of the health benefits brought about by its chemical composition, nutritional value and functional properties (Carvalho et al, 2006), especially in tropical countries.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Postharvest Stem-End Rot on Coconut Fruits

Mussi‐Dias¹,

Freire²

2016

JAES

View full text Add to dashboard Cite

The stem-end rot on coconut fruits is the main postharvest crop disease, causing heavy losses especially when the product is sold fresh. The efficient and practical control of this plant disease has been difficult to date, such as the damage evaluation, which has been done exclusively by the incidence of the disease. However, the incidence parameter alone does not provide a satisfactory understanding of the lesion area and the intensity it can achieve during the storage period, and about the environmental conditions in which the fruits are subjected to the aggressiveness of Lasiodiplodiatheobromae, when it is confirmed as the causal agent of the disease, and the control measures applied. Thus, in this study we propose to evaluate the basal rot development in coconut fruits during postharvest and to prepare and validate a diagrammatic scale to enable the estimation of disease severity. Fruits were inoculated and the external and internal symptoms of disease developments were photographed to measure the damaged area, which were grouped into eight disease levels. Sixty images were assessed by 30 evaluators for three consecutive times at intervals of 7 days and data were subjected to linear regression analysis. Hence, it was possible to create and validate a diagrammatic scale to evaluate the disease severity on coconut fruits with an accurate, precise and reproducible manner. Furthermore, the proposed scale allowed us to distinguish the aggressiveness of different isolates of the fungus through the symptoms of internal fruit rot.

show abstract

Os Combustíveis Verdes Do Brasil - Avaliação Da Lubricidade Do Biodiesel B5 E Óleos De Mamona E Coco

Abstract: PALAVRAS-CHAVE:Petróleo, riscos ambientais, perfuração, sonda, mapa de riscos. KEY-WORDS: petroleum, environmental risks, drilling rig, the risk maps. GREEN FUELS OF BRAZIL -EVALUATION OF LUBRICITY OF B5 BIODIESEL AND RICIN AND COCONUT OILS ABSTRACT

Cited by 6 publications

References 12 publications

Micro and nanometric wear evaluation of metal discs used on determination of biodiesel fuel lubricity

Micro and nanometric wear evaluation of metal discs used on determination of biodiesel fuel lubricity

Study of the properties of lubricating oils obtained from biodiesel

Evaluation of Postharvest Stem-End Rot on Coconut Fruits

Contact Info

Product

Resources

About