A study of the decrease in fossil CO2 emissions of energy generation by using vegetable oils as combustible

Sastre, Juan Antonio López; Alonso, Julio Francisco San José; García, Cristina Romero-Ávila; Romero-Avila, E.J. López; Alonso, Clementa

doi:10.1016/s0360-1323(02)00055-0

Cited by 19 publications

(9 citation statements)

References 2 publications

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“…Three vegetable oil-diesel mixtures were used, namely 5%, 10%, and 20% vegetable oil, as these percentages comply with the literature [11]. Higher vegetable oil concentrations are not desirable, since the CO 2 emissions in these cases are noticeably higher [20,21].…”

Section: Introductionmentioning

confidence: 99%

Artificial Neural Network-Based Analysis of the Tribological Behavior of Vegetable Oil–Diesel Fuel Mixtures

2019

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The use of fuel mixtures of diesel and vegetable oils in diesel engines is a field of research due to the necessity of reducing pollution. Besides the properties required for the normal operation of diesel engines, other aspects that must be investigated are linked to the influence of these mixtures on piston ring–cylinder tribosystem behavior. Methods used for reducing the friction and wear on the engine cylinders, such as special surface machining, lubricant driving piston rings, etc., are well known. If the fuel mixture brings some improvement in this area, such as a reduction of the friction coefficient value, this can be a way to reduce the power lost by friction into the engine cylinders. In this paper, a methodology is presented based on artificial neural networks for analyzing the complex relationship between vegetable oil percentages in fuel mixtures, with the goal of finding an optimal proportion of vegetable oil corresponding to a minimum value of the friction coefficient. Regular methods were used for data acquisition, i.e., a pin-on-disk module mounted on a tribometer, and two types of vegetable oils were studied, namely sunflower and rapeseed oils. The obtained results show that for each type of vegetable oil there is an optimal proportion leading to the best tribological behavior.

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Section: Introductionmentioning

confidence: 99%

Artificial Neural Network-Based Analysis of the Tribological Behavior of Vegetable Oil–Diesel Fuel Mixtures

2019

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“…Biomass, which is solar energy stored in organic vegetable material by means of photosynthesis, can be used in two ways from the point of view of energy use [1,2]:…”

Section: Oleaginous Cultivation and Biofuelsmentioning

confidence: 99%

A note on the combustion of blends of diesel and soya, sunflower and rapeseed vegetable oils in a light boiler

Alonso

Sastre

Romero-Ávila

et al. 2008

Biomass and Bioenergy

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Rape oil (Brassica napus) Soya oil (Soja hispida) a b s t r a c t This paper deals with the study of the vegetable oils (VO) used as fuel for heating. The properties of sunflower, rape and soya oils are studied and these are compared with the properties of C-diesel fuel (used for heating domestic purposes in Spain). The mixtures of VO and diesel are studied and characterized and, finally, the results of a series of combustion trials of the mixtures in a conventional heating installation with a mechanical pulverization burner are presented. The results show that viscosity of VO limits the use of blends up to 40% of them, and the oxygen present in their structures contributes to an efficiency gain.

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“…Another strategy widely used by a number of researchers to reduce the viscosity of VOs involves blending them with lower viscosity oil derivatives. In this regard, San José et al used a conventional facility equipped with a mechanical pulverization burner to burn blends of diesel fuel with a range of VOs such as sunflower (SfO) [5,6] soya (SyO) [7,8] and rapeseed oil (RpO) [9]. Using injection pressures between 1x10 6 and 1.4x10 6 Pa and different VO-diesel fuel blends (up to 40 % in VO), combustion performances above 85% and NOx emissions below 53 ppm were attained by the authors.…”

Section: Introductionmentioning

confidence: 99%

“…In another study [10], the combustion of diesel fuel-animal fat blends, not apt for human consumption, in a residential oil burning facility was carried out. The best combustion performances were obtained for blends with 10% animal fat, using an injection pressure of 1x10 5 Pa. Daho et al [11] studied the performance and emissions of different coconut vegetable oil (CnO)-diesel fuel blends in a domestic boiler, and reported that CO, NOx and CO2 emissions were the same for all blends studied, when the boiler worked at an injection pressure of 2x10 6 Pa. Jiru et al [12] evidenced that it is possible to burn blends of SyO degummed fuel oil (20% SyO) in an unmodified commercial burner. The combustion of blends of palm oil (PlO)-diesel fuel in an industrial oil burner with and without secondary air was studied by Mohd Jaafar et al [13].…”

Section: Introductionmentioning

confidence: 99%

“…San José et al [21] showed that the use of a low-pressure auxiliary air fluid pulverization burner is the best option for burning liquid fuels, such as VOs, with a kinematic viscosity between 26 and 112 mm 2 •s -1 (at 50 ºC). Using this burner, which operates with an injection pressure of 1x10 5 Pa, the authors carried out the combustion of VOs, rich in unsaturated fatty acids (SfO, RpO, SyO) as well as CnO and PlO with a high content of saturated fatty acids [22,23]. A relationship between the VOs' degree of unsaturation and certain combustion parameters was established in these works, which found that CO emissions decreased and that combustion efficiencies increased as the degree of VO unsaturation rises [23].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Statistical Study of Combustion Characteristics and Optimal Operation Factor Determination in an Emulsion Burner Fueled with Vegetable Oils

Arroyo¹,

Sanz‐Tejedor²,

Alonso³

et al. 2019

Energy Fuels

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This work experimentally investigates the combustion characteristics of refined soya, sunflower and rapeseed vegetable oils and, by means of statistical techniques, determines the optimal operating factors of an emulsion burner to obtain the best combustion performance and low pollutant emissions. Given the high dimensionality of the study, the PCA provides a descriptive study of the variables involved in the combustion process and of the physicochemical properties of the vegetable oils so as to establish the correlations between them. ANOVA was then performed to identify which factors (type of vegetable oil, fuel flow, and airflow), as well as any possible interactions, have the greatest impact on the combustion results (performance as well as CO2, CO, NOx, CxHy and SOx emissions). ANOVA results showed that almost all of the factors and their interactions were significant, which makes it essential to analyse the interaction plots to see the optimal combinations of levels. This study showed that fuel flow rate was quite an important factor affecting combustion characteristics, that the type of vegetable oil influenced CxHy emissions, and that the airflow rate displayed no clear trend. Furthermore, the best combustion performance coupled with pollutant emissions that were below the lowest limits established by current legislation were achieved for a combination of maximum fuel flow and minimum airflow rates, with soya exhibiting the best performance. In general, good combustion performances were obtained with extremely low NOx emissions, and SOx emissions were not detected in any of the combustion experiments performed.

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A study of the decrease in fossil CO2 emissions of energy generation by using vegetable oils as combustible

Cited by 19 publications

References 2 publications

Artificial Neural Network-Based Analysis of the Tribological Behavior of Vegetable Oil–Diesel Fuel Mixtures

Artificial Neural Network-Based Analysis of the Tribological Behavior of Vegetable Oil–Diesel Fuel Mixtures

A note on the combustion of blends of diesel and soya, sunflower and rapeseed vegetable oils in a light boiler

Statistical Study of Combustion Characteristics and Optimal Operation Factor Determination in an Emulsion Burner Fueled with Vegetable Oils

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