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

Bala-Litwiniak, Agnieszka; Radomiak, H.

doi:10.1007/s12649-018-0260-7

Cited by 28 publications

(12 citation statements)

References 33 publications

(32 reference statements)

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“…In the transesterification reaction, triglycerides are converted, stepwise, to diglyceride, monoglyceride, and finally glycerol, which sinks to the bottom [31]. In addition, biodiesel that floats on top of the glycerol is an important byproduct and can be burned for heat or used as a feedstock in the cosmetic industry [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Biodiesel and Crude Glycerol from Waste Frying Oil: Production, Characterization and Evaluation of Biodiesel Oxidative Stability with Diesel Blends

et al. 2019

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Waste oils are becoming increasingly more important as feedstock for the production of fuels and glycerol as byproduc. Optimization of homogeneous transesterification of waste frying oil (WFO) to biodiesel over hydroxide potassium (KOH) catalyst have been investigated. In this respect, response surface methodology (RSM) was applied to determine the relationships between methanol and WFO molar ratio (3:1–12:1), KOH concentration (0.5%–2%) and temperature (25–65 °C) on the conversion yield. Transesterification of WFO produced 96.33% maximum methyl ester yield at the optimum methanol/WFO molar ratio 7.3:1, KOH loading 0.5 wt. % and the reaction temperature was 58.30 °C. The physicochemical properties of optimized biodiesel met the requirements of the European Norm 14214, such as kinematic viscosity at 40 °C 4.57 mm/s2, the sulfur content 0.005 wt. %, and the density at 15 °C 889.3 kg/m3. This study also examined the accelerated oxidation of biodiesel and biodiesel/diesel blends under combined temperature and air effect at different periods of time while measuring their acidity. Results have shown that total acid number increased proportionally to the biodiesel content of the biodiesel/diesel blends from 0.5 mgKOH/g for B7 (7% (v/v) biodiesel and 93% (v/v) diesel) up to 2.8 mg KOH/g for B100 (100% biodiesel). The synthesized trans-esterified oil can be a potential alternative to petrodiesel, hence its application at an industrial scale. This work also reports some properties of crude glycerol (CG) derived from biodiesel from WFO. The glycerol yield (%), pH, water content (wt. %), density at 15 °C (g/cm3), and kinematic viscosity at 40 °C (mm2/s) was analyzed according to standard test methods.

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Section: Introductionmentioning

confidence: 99%

Biodiesel and Crude Glycerol from Waste Frying Oil: Production, Characterization and Evaluation of Biodiesel Oxidative Stability with Diesel Blends

et al. 2019

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“…Bala-Litwiniak & Radomiak (2019) investigated the association between glycerine addition and ash content in wood pellets. The findings reported by those researchers show that the addition of glycerine at the weight rates of 2.0%, 4.5% and 7.0% led to reduced ash contents in the relevant pellets [66]. Chavalparit et al (2013) showed that the addition of glycerine is related to increased content of ash in the pellets [67].…”

Section: Resultsmentioning

confidence: 94%

Modification of Energy Parameters in Wood Pellets with the Use of Waste Cooking Oil

Saletnik

Puchalski

2021

Energies

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Biomass is one of the most important sources of renewable energy. It is expected that in the coming decades, biomass will play a major role in replacing fossil fuels. The most commonly used biofuels include wood pellet, which is a cost-effective, uniform and easy-to-use material. In view of the growing interest in this type of resource, novel methods are being investigated to improve the quality of pellet. This article presents the results of a laboratory study focusing on wood pellets refined with waste sunflower cooking oil applied by spraying. In this work, authors attempted to modify the energy parameters of wood pellets with the use of waste cooking oil. Addition of waste cooking oil, applied at the rates of 2%, 4%, 6%, 8%, 10% and 12% relative to the weight of pellets, increased the calorific value of the pellets without decreasing their durability. The highest dose of the modifier (12%) on average led to a 12–16% increase in calorific value. In each case, the addition of sunflower oil resulted in decreased contents of ash in the pellets; on average a decrease of 16–38% was observed in the samples treated with the highest dose of the modifier. The treatment led to a higher content of elements affecting the heating value, i.e., carbon and hydrogen, which on average increased by 7.5–12%, and 7.0–10.0%, respectively. The presented method seems to be a promising way of increasing the calorific value of pellets. Further research on refining the method and the possibility of using it in industry is necessary.

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“…When using oak wood sawdust, bulk densities of 222 kg/m 3 (Quercus rugosa) and 246 kg/m 3 (Quercus laeta), were reported [68]. On the other hand, an investigation revealed a density of 590 kg/m 3 for pine and fir wood pellets [69]. This density is of utmost importance for the transportation, handling and storage of densified biofuels [66].…”

Section: Bulk Densitymentioning

confidence: 99%

Pellets from Lignocellulosic Material Obtained from Pruning Guava Trees: Characterization, Energy Performance and Emissions

et al. 2022

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In this study, lignocellulosic material derived from guava tree pruning was used to make pellets in a laboratory machine. The following experiments were conducted to identify the properties of the biomass samples before the pelletizing process: chemical analysis, proximal analysis, elemental analysis, ash microanalysis and thermogravimetric analysis (TGA-DTG). The following analyses were performed on the densified material: moisture content, particle density, bulk density, impact resistance and calorific value. The guava pellets evaluated, with respect to open fires, mitigate the CO2, CO, CH4, HCNM, EC, OC and PM2.5 emissions. Emissions per unit of consumed energy were reduced by 8 times for PM2.5, almost 5 times for HCNM, 3 times for CH4, 7 times for CO, 2 times for CO2, 6 times with respect to EC and almost 30 times for OC. The results of the physical and energetic evaluation of the pellets indicate good potential for its use as a solid densified biofuel.

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

Cited by 28 publications

References 33 publications

Biodiesel and Crude Glycerol from Waste Frying Oil: Production, Characterization and Evaluation of Biodiesel Oxidative Stability with Diesel Blends

Biodiesel and Crude Glycerol from Waste Frying Oil: Production, Characterization and Evaluation of Biodiesel Oxidative Stability with Diesel Blends

Modification of Energy Parameters in Wood Pellets with the Use of Waste Cooking Oil

Pellets from Lignocellulosic Material Obtained from Pruning Guava Trees: Characterization, Energy Performance and Emissions

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