Resource recovery through catalytic cracking of waste plastics

Parikh, Parimal A.; Rotliwala, Yogesh C.

doi:10.1680/warm.2008.161.2.85

Cited by 4 publications

(4 citation statements)

References 26 publications

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“…Moreover, pyrolysis of polystyrene has been optimized for reaction time and reaction energy using temperature profiles to establish the economic viability [14]. Performance of thermal and catalytic pyrolysis of various plastics and their pros and cons with reference to product distribution has been the subject of the recent reviews [e.g., 15]. Costs and rates of deactivation of the catalysts have been mentioned to be an impediment to wider applications of catalytic pyrolysis as a means to curb the menace of the waste plastics.…”

Section: Introductionmentioning

confidence: 99%

Thermal degradation of rice-bran with high density polyethylene: A kinetic study

Rotliwala¹,

Parikh

2011

Korean J. Chem. Eng.

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Thermal degradation behavior of mixtures of rice bran (RB) and high density polyethylene (HDPE) was investigated by thermo-gravimetric analyses (TGA) under dynamic conditions in nitrogen atmosphere and was compared with that of individual materials. Experiments were carried out in the range of ambient temperature to 900 o C at two heating rates (5 and 20 o C per minute). Kinetic analysis indicated that activation energy for pyrolysis of RB, HDPE and those for RB-HDPE mixtures varied with rate of heating as well as with the three temperature ranges. This variation has been explained on the materials' decomposition behavior. Maximum difference between experimental and theoretical mass loss (∆m) was 26% at 475 o C and 34% at 489 o C at the heating rates of 5 and 20 o C per minute, respectively. These maxima indicate stronger interactions at corresponding temperature between RB and HDPE during copyrolysis. Reduction in activation energy for pyrolysis, lower temperatures at which rate of decomposition is highest, and negligible quantity of the residue suggest a synergism between thermal degradation of RB and HDPE.

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Section: Introductionmentioning

confidence: 99%

Thermal degradation of rice-bran with high density polyethylene: A kinetic study

Rotliwala¹,

Parikh

2011

Korean J. Chem. Eng.

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“…Performance of thermal and catalytic pyrolysis of various plastics and their advantages and disadvantages with reference to product distribution has been the subject of recent reviews (e.g. Parikh & Rotliwala 2008).…”

Section: Introductionmentioning

confidence: 99%

Study on thermal co-pyrolysis of jatropha deoiled cake and polyolefins

Rotliwala¹,

Parikh

2011

Waste Manag Res

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Three plastics, high density polyethylene (HDPE), polypropylene (PP) and polystyrene (PS), were individually co-pyrolysed with deoiled cake of jatropha (JC) at 400 and 450°C in a batch reactor in the presence of nitrogen under atmospheric pressure to produce modified liquid fractions. At higher temperature (450°C), the yield of liquid fractions by the pyrolysis of plastics (HDPE, PP and PS) alone was found to increase by 11, 12.5 and 11% for HDPE, PP and PS, respectively. Furthermore, the gaseous fraction increased by 1.3 to 2.6% while the residue generation reduced by 12.3 to 15.1%. In comparison with only plastics pyrolysis, the yield of the liquid fraction improved by 2.0 to 4.9% for their co-pyrolysis with JC. Gas chromatography-mass spectrometry analyses demonstrated that the co-processing afforded a reduction of paraffin and olefins in the liquid fractions for all of the experiments. This reduction was found to be in the order of PS > PP > HDPE. Furthermore, the proportion of oxygenates in the liquid product increased in the order of PP > HDPE > PS. Physical characteristics such as oxygenates, water contents, acid values and viscosity increased during the co-pyrolysis of plastics and JC in contrast to the liquid fractions obtained from the pyrolysis of pure plastics. Furthermore, co-pyrolysis offered a reduction in calorific values.

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“…Other studies have suggested that an increase in the production of light oil fractions occurs as the time of catalyst usage increases, thus causes a decrease in catalyst activity [11]. In addition, the use of catalysts in several studies showed a decrease in oil fraction and residue while increasing gas fraction [12]. This result occurs due to continued cracking of the product of oil fraction into gas.…”

Section: B Research On Pyrolysismentioning

confidence: 97%

Pyrolysis of Ethylene Vynyl Acetate Polymer by Natural Zeolite Catalyst as an Alternative Fuel

Salamah¹,

Azhari²,

Mitanto³

2019

Proceedings of the 2019 Ahmad Dahlan International Conference Series on Engineering and Science (ADICS-ES 2019)

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In Indonesia, ethylene vinyl acetate polymer type of sponge waste increases in number. The increase was due to the increase of the shoe factory which was the main consumer of this type of sponge. Conversion of this type of waste is done as an alternative fuel oil through pyrolysis process. The purpose of this study is to convert the sponge waste through pyrolysis process using a batch type reactor with the aid of a natural zeolite catalyst. The research used variation of the catalyst weight from 2%, 4%, 6%, 8%, 10% out of 200 grams of the weight of the feed with variations in reaction time ranging from 60 minutes, 90 minutes, 120 minutes, 150 minutes, and 180 minutes. The results showed that the optimum yield obtained was 51.22% using 4 gram weight of catalyst with 180 minutes processing time. The GC-MS analysis showed that the largest functional group of pyrolysis products for the fraction above distillation, the fraction before distillation, and the fraction under distillation, respectively, are 3-Nitro-1,2-Benzenedicarboxylic acid (88.11%), Cyclopentane, 1,1'-[3-(2-Cyclopentylethyl)-1,5-Pentanediyl] Bis-(CAS)1,5-DicyclopentyL-3-(2-Cyclopentylethyl)-Pentane(19.77%), and 1,13-Tetradecadiene (10.07%). The calorific value of the pyrolysis oil produced was 10992.6 calories/gram. This result was similar to the calorific value of gasoline fuel (10509 calories/gram). In addition, the analysis of the physical characteristics of the pyrolysis oil fraction on distillation was the same as the standard specifications for petrol and diesel fuel oils.

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Resource recovery through catalytic cracking of waste plastics

Cited by 4 publications

References 26 publications

Thermal degradation of rice-bran with high density polyethylene: A kinetic study

Thermal degradation of rice-bran with high density polyethylene: A kinetic study

Study on thermal co-pyrolysis of jatropha deoiled cake and polyolefins

Pyrolysis of Ethylene Vynyl Acetate Polymer by Natural Zeolite Catalyst as an Alternative Fuel

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