Optimization of combined mixture and process variables for the pyrolysis oil yield from co‐pyrolysis of polymeric wastes

Co-pyrolysis of lignite and pistachio seed (CPLPS) under nitrogen gas was performed in a Heinze retort. The effect of pyrolysis temperature on product distribution of CPLPS investigated under heating rate of 10°Cmin-1 and blending ratio of 50(wt)%. Biomass is higher yield to be pyrolyzed than lignite and addition of biomass promotes the pyrolysis of lignite. In the range of the experimental conditions investigated the yield of the product is proportional to pyrolysis temperature. On the other hand, considerable synergetic effects were observed during the co-pyrolysis in a fixed bed reactor leading to increase in oil yield. Maximum pyrolysis oil yield of 27.2% was obtained at pyrolysis temperature of 550°C. The obtained oils are characterized by GC, and elemental analysis.

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Recycling of product gas does not affect fast pyrolysis oil yield and composition

Journal of Analytical and Applied Pyrolysis ◽

10.1016/j.jaap.2020.104794 ◽

2020 ◽

Vol 148 ◽

pp. 104794

Author(s):

Mehmet Pala ◽

Pushkar S. Marathe ◽

Xun Hu ◽

Frederik Ronsse ◽

Wolter Prins ◽

...

Keyword(s):

Fast Pyrolysis ◽

Oil Yield ◽

Pyrolysis Oil ◽

Product Gas

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Co-pyrolysis of rubberwood sawdust (RWS) and polypropylene (PP) in a fixed bed pyrolyzer

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.13.1.2019.20.0390 ◽

2019 ◽

Vol 13 (1) ◽

pp. 4636-4647 ◽

Cited By ~ 1

Author(s):

N. I. Izzatie ◽

M. H. Basha ◽

Y. Uemura ◽

M. S. M. Hashim ◽

M. Afendi ◽

...

Keyword(s):

Carbon Dioxide ◽

Carbon Monoxide ◽

Water Content ◽

Fixed Bed ◽

Oil Yield ◽

Pyrolysis Oil ◽

Pyrolysis Process ◽

Increasing Trend ◽

Different Temperatures

Co-pyrolysis of rubberwood sawdust (RWS) waste and polypropylene (PP) was carried out at different temperatures (450,500,550, and 600°C) with biomass to plastics ratio 1:1 by using fixed bed drop-type pyrolyzer. The yield of pyrolysis oil has an increasing trend as the temperature increased from 450°C to 550°C. However, the pyrolysis oil yield dropped at a temperature of 600°C. Co-pyrolysis of RWS and PP generated maximum pyrolysis oil with 36.47 wt.% at 550°C. The result is compared with the pyrolysis of RWS only without plastics, with the same feedstock, and the maximum pyrolysis oil yield obtained was 33.3 wt.%. The water content in pyrolysis oil of co-pyrolysis RWS with PP is lower than RWS only with 54.2 wt.% and 62 wt.% respectively. Hydrocarbons, acyclic olefin, alkyl, and aromatic groups are the major compound in the pyrolysis oil from the co-pyrolysis process. Carbon monoxide (52.2 vol.%) and carbon dioxide (38.2 vol.%) are the major gas components.

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Optimization of Phytochemical Screening Analysis of Ocimum Gratissimum Leaf Oil Extraction Process

Earthline Journal of Chemical Sciences ◽

10.34198/ejcs.1219.139158 ◽

2019 ◽

pp. 139-158

Author(s):

J. O. Ezeugo ◽

M. N. Nwanekezie ◽

O. D. Onukwuli ◽

C. C. Olisa-Bosah ◽

L. I. Ezeh

Keyword(s):

Particle Size ◽

Acid Value ◽

Extraction Process ◽

Oil Yield ◽

Extraction Temperature ◽

Process Variables ◽

Ocimum Gratissimum ◽

Leaf Oil ◽

Pharmaceutical Industries ◽

Temperature Time

Optimization of the process variables for the extraction of oil from Ocimum gratissimum (scent leaves) was studied. The effects of various process variables such as temperature, time, volume of solvent, particle size and their interaction on oil yield were investigated. A predictive model describing the oil yield in terms of process variables was derived from multiple regression analysis. Optimum yield of (54%) was predicted at extraction temperature of 50°C, extraction time of 40 min, leaf particle size of 150µm and 125ml volume of solvent but decreased with increase in leaf particle size. The extract was analysed to examine the physiochemical properties such as acid value, iodine value, peroxide value, viscosity, saponification value, specific gravity, moisture and ash contents using standard methods. Results revealed that the oil is edible and can find uses in food and pharmaceutical industries for spice and drug production respectively.

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Influence of Heating Rate and Temperature on the Yield and Properties of Pyrolysis Oil Obtained from Waste Plastic Bag

Conserve Journal of Energy and Environmental Studies ◽

10.30588/cjees.v1i1.248 ◽

2017 ◽

Vol 1 (1) ◽

Author(s):

M. Sigit Cahyono ◽

Ucik Ika Fenti

Keyword(s):

Heating Rate ◽

Fixed Bed ◽

Diesel Oil ◽

Fixed Bed Reactor ◽

Oil Yield ◽

Pyrolysis Oil ◽

Heating Rates ◽

Waste Plastic ◽

Plastic Bag ◽

Wax Content

The objective of the research was to investigate the influence of heating rate and temperature in the reactor on the yield and properties of pyrolysis oil obtained from waste plastic bag, that is considered as low-density polyethylene (LDPE). The experiments were performed in fixed bed reactor equipped with a steam atomizing burner, a temperature controller, and a condenser. Approximately, the amount of ten kilograms of waste plastic bag loaded into the reactor chamber and then pyrolyzed using the temperature between 250 and 450°C and heating rates of 5 to 15°C/min. The results showed that as the oil yield decreased, the heating rate increased. Alternatively, the oil yield increased with temperature and the wax content decreases as the temperature increases. The highest quantity of pyrolysis oil was produced from waste plasctic bag is 45%, in the temperature 450oC and the heating rate 15°C/min, with wax content of 25%, solid char of 12 % and non-condensable gas of 41%. The physical properties of oil were evaluated and compared to those of diesel oil. The analysis results showed that the oil product’s properties from pyrolysis of the waste plastic bag in temperature 4500C, were relatively closer to those of diesel oil with caloric value 11,043 kcal/kg, specific gravity of 0.812, kinematic viscosity 2.80 mm2/s, and flash point of 27oC.

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Effect of Exchangeable Cation in Clays on the Yield and Quality of the Bio-Oil during Microwave Pyrolysis of Cellulose

Sustainable Chemistry ◽

10.3390/suschem1030021 ◽

2020 ◽

Vol 1 (3) ◽

pp. 315-324

Author(s):

Alisa Doroshenko ◽

Ihor Pylypenko ◽

Simona Gromovaite ◽

James Clark ◽

Vitaliy Budarin

Keyword(s):

Oil Yield ◽

Conventional Heating ◽

Exchangeable Cation ◽

Pyrolysis Oil ◽

Heating Rates ◽

Microwave Pyrolysis ◽

Yield And Quality ◽

Bio Oil ◽

Cation Nature

Bio-oil (pyrolysis oil) is an essential feedstock for the production of renewable fossil-free fuels and valuable chemicals. Enhancement of the pyrolysis oil yield and its quality are significant challenges for an efficient and sustainable biorefinery. Here, we report the microwave (MW)-assisted noncatalytic pyrolysis of cellulose, as a green and controllable alternative to conventional heating, in the presence of eco-friendly Li-, Na-, K-, Mg-, Ca- and Ba-bentonites. The detailed analysis of the MV heating traces demonstrates that the bentonite MW activity significantly depends on the presence of internal water. The intensity of this interaction is controlled by the cation nature reduced in the order: Li+ > Na+ > K+ and Mg2+ > Ca2+ > Ba2+. A unique experimental design for the MW-assisted pyrolysis of cellulose in the presence of Li-doped clays helps to increase the bio-oil yield to 37.8% with high selectivity towards the commercially useful levoglucosan (purity: 39.36%). The combination of an alternative green heating method and environmentally friendly bentonites can be used many times without recycling. We believe that the improved yields of bio-oil are due to: (i) high MW activity of bentonites, which conventionally increases the heating rates of cellulose; and (ii) production of water by hydrophilic clay minerals, favouring depolymerisation of cellulose.

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Effect of process conditions on Sandbox seed oil yield by mechanical expression: A response surface approach

Poljoprivredna tehnika ◽

10.5937/poljteh2003070n ◽

2020 ◽

Vol 45 (3) ◽

pp. 70-81

Author(s):

Onwe Nwabueze ◽

Bamgboye Isaac

Keyword(s):

Moisture Content ◽

Response Surface ◽

Oil Extraction ◽

Oil Yield ◽

Process Conditions ◽

Process Variables ◽

Roasting Temperature ◽

Oil Expression ◽

Expression Time ◽

Roasting Time

Cost of solvent oil extraction methods has made mechanical oil expression a desirable alternative. The effect of process variables on mechanical oil expression from sandbox seed was studied. The experimental design used for the study was a 52 Central Composite Rotatable Design of Response Surface Methodology. Experimental factors considered were: moisture content, roasting temperature, roasting time, expression pressure and expression time. Results obtained were analyzed at a0.05. The oil yield from the sandbox seed ranged from 16.38-38.68%, and was increased at processing variable ranges of (4.0-8.0%) moisture content, (80.0-90.0°C) roasting temperature, (5.0-15.0%) roasting time, (15.0-20.0 MPa) expression pressure and (6.0-8.0 min) extraction time. The maximum oil yield of 38.68% was obtained at the processing conditions of 6% moisture content, 85 °C roasting temperature, 15 min roasting time, expression pressure of 20 MPa and 8 min pressing time. Model equation relating the process variables to oil yield was developed. Coefficient of determination (R2) relating the process was 0.8908. The result showed that moisture content, roasting time, expression pressure and expression time had a significant influence on the sandbox oil yield. The results obtained in this study can serve for process and equipment designs for oil extraction from sandbox and other oilseeds and nuts.

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The Influence of Particle Size and Fuel Consumption Rate on Oil Characteristics from Pyrolysis of Aluminum Foil Coated Polyethylene (Al-PE) Waste

Conserve Journal of Energy and Environmental Studies ◽

10.30588/cjees.v1i1.250 ◽

2017 ◽

Vol 1 (1) ◽

Cited By ~ 1

Author(s):

Muhammad Noviansyah Aridito

Keyword(s):

Particle Size ◽

Fuel Consumption ◽

Consumption Rate ◽

Aluminum Foil ◽

Plastic Waste ◽

Oil Yield ◽

Pyrolysis Oil ◽

Fuel Consumption Rate ◽

Yellow Color ◽

Oil Characteristics

The collection of oil and aluminum is an effort made in order to utilize waste from Aluminum Foil Coated Polyethylene (Al-PE). Meanwhile, pyrolysis is one of the conversion technologies that can be used to treat this kind of waste. The materials that would be used in this research is Al-PE plastic waste. This research aims to determine the effect of fuel consumption rate and particle size on the oil characteristics from pyrolysis of aluminum foil coated polyethylene plastic (AI-pE) waste. The material used in this research is Al-PE plastic waste. The selected particle size variations were 50 × 50 mm and 100 × 100 mm for 130 minutes with variations in fuel consumption rate of 4.77 g/min, 377 g/min and 2.46 g/ min. The resultant pyrolysis and aluminum oil is measured to obtain yield. The results showed that Al-PE pyrolysis oil has a brownish yellow color, distinctive odor, flammability and physical character close to kerosene even to gasoline. The oil yield is between 6.9% wt to 22.4% wt. The highest oil yield and highest heating value obtained from sample A with particle size 50 × 50 mm and fuel consumption rate 4.99 g/min (0.29 kg/h) per kg of Al-PE for 130 min with material density in reactor 27 kg/m3.

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