Scope and opportunities of using glycerol as an energy source

Gupta, Mona; Kumar, Naveen

doi:10.1016/j.rser.2012.04.001

Cited by 99 publications

(64 citation statements)

References 15 publications

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“…These oils can be converted to biodiesel by the well-established alkaline transesterification with alcohols like methanol [30]. Glycerol phase as the main by-product of this transesterification process can be digested anaerobically in biogas plants [100], thermally converted by combustion [42], or applied as accessible carbon source for numerous biotechnological applications [5,35,82,128]; these possible treatments were comprehensively reviewed by Chisti [30]. In addition, glycerol can be commercialized for manufacturing cosmetic products, or can be applied in food industry as humectant (E422).…”

Section: Generalmentioning

confidence: 99%

Microalgae as versatile cellular factories for valued products

Koller

Muhr

Braunegg³

2014

Algal Research

509

307

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Section: Generalmentioning

confidence: 99%

Microalgae as versatile cellular factories for valued products

Koller

Muhr

Braunegg³

2014

Algal Research

509

307

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“…Unfortunately, the mentioned methods require preliminary purification of crude glycerol which adds costs. The simplest and the cheapest method of waste glycerol utilization seems to be its use for heat-generation [7,[22][23][24]. Glycerol reveals a relatively high calorific value (16.1-22.6 MJ/kg depending on the raw material used to biodiesel production [10,13,25]).…”

Section: Introductionmentioning

confidence: 99%

Possibility of the Utilization of Waste Glycerol as an Addition to Wood Pellets

Bala-Litwiniak

Radomiak

2018

Waste Biomass Valor

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Production of liquid biofuels derived from vegetable oils in recent years significantly increased which causes surplus of by-product (waste glycerol) from this process. Therefore it is of great importance to find cheap and fast method of use its utilization. In this study, a possibility of the utilization of technical purity glycerin as an addition to wood pellets intended for heating purposes has been investigated. Usefulness of pellets contained glycerol additions has been compared in terms of applicable quality standards for wood pellets. Effects of waste glycerol addition on concentration of combustion products as well as temperature in heat exchanger have also been examined. The experimental results show that co-combustion of waste glycerol with wood sawdust does not worsen heating efficiency in a standard boiler. Moreover, 4.5 and 7% presence of glycerol in wood pellets correlated to a nearly twofold decrease of NO x concentration in flue gas. Therefore, the use of the waste glycerol as a binder for the production of pellets can be a simple and cost-effective solution of its utilization.

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“…The waste (crude) glycerin is formed as a by-product in process of transesterification of biodiesel oil manufacturing [11][12][13]. Due to the relatively high calorific value of the waste glycerin (16.1-22.6 MJ/kg depending on the raw material used to biodiesel production [14][15][16]), a reasonable solution seems to be its utilization as a heating fuel [15][16][17][18][19]. Unfortunately, direct combustion of the waste glycerin is unprofitable due to its high viscosity and relatively high flash-point which requires a costly modifications of heating equipment [15,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the relatively high calorific value of the waste glycerin (16.1-22.6 MJ/kg depending on the raw material used to biodiesel production [14][15][16]), a reasonable solution seems to be its utilization as a heating fuel [15][16][17][18][19]. Unfortunately, direct combustion of the waste glycerin is unprofitable due to its high viscosity and relatively high flash-point which requires a costly modifications of heating equipment [15,[17][18][19]. The simplest and the cheapest method of the utilization of the waste can be its co-combustion with other fuels [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Numerical prediction of the chemical composition of gas products at biomass combustion and co-combustion in a domestic boiler

et al. 2017

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Abstract. In recent years the numerical modelling of biomass combustion has been successfully applied to determine the combustion mechanism and predict its products. In this study the influence of the addition of waste glycerin in biomass wood pellets on the chemical composition of exhaust gases has been investigated. The pellets have been prepared from spruceand pine wood sawdust without and with addition of waste glycerin. The waste glycerol is a undesirable by-product of biodiesel transesterification at oil manufacturing. The produced pellets were being burned in the 10 kW domestic boiler adapted to wood pellets combustion. The possibilities of pollutants generation (CO2, CO, NOx SOx and compounds containing chlorine) in the exhaust gases coming from the boiler were numerically calculated using the latest version of CHEMKIN-PRO software, introduced by the American company Reaction Design. The results of the calculations correspond to the data obtained on a real object, in particular: combustion temperature, gas pressure, residence time of fuel in the burner, air flow, fuel consumption, as well as elementary composition of fuel supplied into the boiler. The proposed method of predicting the chemical composition of exhaust gases allows proper control of the combustion process and can be considered as an important step in reducing the pollutants (lower emission of NOx, SOx and CO2 neutral) and thus to contribute to the improvement of the environmental quality. In addition, knowledge of the amounts of Clbased compounds produced in combustion process (under given conditions), can serve as an important hint in terms of corrosion prevention of boiler-and chimney steels.

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Scope and opportunities of using glycerol as an energy source

Cited by 99 publications

References 15 publications

Microalgae as versatile cellular factories for valued products

Microalgae as versatile cellular factories for valued products

Possibility of the Utilization of Waste Glycerol as an Addition to Wood Pellets

Numerical prediction of the chemical composition of gas products at biomass combustion and co-combustion in a domestic boiler

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