Вплив кратності перемішування на якісні показники дизельного біопалива

Анотація

INFLUENCE OF STIRRING MULTIPLICITY ON QUALITY INDICATORS BIODIESEL

G. Golub, M. Pavlenko, V Chubа

Currently, the most efficient technology of biodiesel production from vegetable oils is a technology using methanol and alkaline catalyst in the proportions specified. This technology does not require sophisticated equipment, which in turn positively influences the cost of biodiesel produced.

Improvements to equipment to produce biodiesel from vegetable oils impossible without major performance impact assessment of operational and technological parameters of equipment on the quality of the biofuel.

Currently experimentally the influence of process parameters on quality indicators esterification of biodiesel derived from rapeseed oil. Experimentally impact of sedimentation and concentration of reagents on quality biodiesel using mechanical mixing. The basic parameters of reactor-separator to produce biodiesel from vegetable oils using cycle mixing, and set to work stations, which provide minimum energy consumption for mixing of emulsions.

However, data on the impact on the multiplicity of mixing biodiesel quality indicators using circulating stirring the mixture components are missing, so there is a need for appropriate experimental studies.

The purpose of research - to determine the effect of mixing the multiplicity of indicators on quality biodiesel using circulating mixing mixing.

Materials and methods of research. For the experimental studies were used circulating plant for biodiesel production, which was fixed speed hydro at 200 rev./min. Time stirring the mixture ranged from 34.5 to 138 seconds (34.5 s - 1 multiple mixing 51.75 pp - 1.5 fold, 69 p - 2 fold, 3 fold 103.5 C and 138 C – 4 fold). Time defending biodiesel obtained ranged from 1 to 21 days locked kinematic viscosity and flashpoint 24, 240 and 504 hours. Research conducted at the research laboratory of technical and bioenergy systems of nature.

Results. It was found that with increasing multiplicity of mixing, a separation of the mixture decreases due to more complete passage esterification process. Quantitative biodiesel output by changing the mixing frequency rate remained virtually unchanged and was in the range of 94 to 95% (average was 94.62%).

Analysis of the impact on the multiplicity of kinematic viscosity mixing biodiesel showed that with increasing multiplicity mixing kinematic viscosity decreases.

The minimum kinematic viscosity is achieved at 4 times the mixture and stirring is 4.62 mm²/s. Although all the figures obtained meet the requirements of ISO 6081: 2009, as matter of less than 5 mm²/s.

It was also established that with increasing time defending 24 to 168 hours. Open the air temperature gradually increases flash, while upholding time from 168 to 288 hours. increases in proportion to time, and at the time of defending 288 to 384 hours. increase the flash point of public access air slows. Flash biodiesel meets the requirements of ISO 6081: 2009, namely 120˚C at time defending open the air more than 308 hours. This multiplicity of mixing virtually no effect on the value flashpoint, since the pursuit within 504 hours. and changing the multiplicity of mixing from 1 to 4, the flash point was in the range of 136 to 142˚C (average was 139˚C).

In pursuit without air flash point of biodiesel is below normative values according to ISO 6081: 2009.

The results of the experiment received regression equation in the form of third-order polynomial.

Conclusions

Thus, the experiment found that the frequency of mixing does not affect the quantitative output of biodiesel and its flashpoint, which depends on the time of defending the air. Kinematic viscosity of biodiesel decreases with increasing multiplicity of mixing time and defending of the air, but within the meaning of the multiplicity of mixing from 1 to 4, meaning biodiesel kinematic viscosity does not exceed the normative values.