Effects of plastic wastes on coal pyrolysis behaviour and the structure of semicokes

Vivero, L.; Barriocanal, C.; Álvarez, R.; Díez, M.A.

doi:10.1016/j.jaap.2004.08.006

Cited by 88 publications

(74 citation statements)

References 16 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It means that decomposition of LVC is accomplished in broader temperature range and thermal degradation of the studied coal starts at lower temperature (T I =272 °C) and ends at higher temperature (T F =644 °C) than polymers which corresponds with literatures [5,7]. Temperature range for plastic thermal decomposition varies from T I =220 (for ST) to T F =586 °C (for PP) and in this temperature range the highest effect of polymers addition in coal could be occurred [15].…”

Section: Tabsupporting

confidence: 78%

See 1 more Smart Citation

Study of Pyrolysisis of Polymers and Coal and Co-Pyrolysis of Their Blends, Kinetics of the Process

Mikulová¹,

Večeř²,

Frantík³

2012

TransVSBms

View full text Add to dashboard Cite

Amount of polymer waste increase every year and for this reason upgrading of this waste is a necessity. Nowadays waste disposal and incineration of polymers waste are the most frequently used methods which (i) did not allowed chemical and energy utilization and (ii) are not environmentally friendly. Pyrolysis and co-pyrolysis provide an attractive way to dispose of and convert polymer waste and coal into higher value fuel and the specific benefits of this method potentially include many environmental friendly advantages. Pyrolysis and co-pyrolysis has been studied using termogravimetry apparatus NETZCH TG-DTA STA 409 EP. The pyrolysis of all polymers except for scrap tyres was a one-step process and temperature range was narrower than for coal pyrolysis. The overlapping temperature range for pyrolysis of polymers and coal was 200-600°C. The synergic effect and kinetics of co-pyrolysis of polymers and coal has been studied in the given temperature range. The addition of polymers to coal led to (i) the enhancement of weight loss of brown coal, (ii) the shift of temperature of the max pyrolysis speed and (iii) the slight influence of E A of coal pyrolysis. AbstraktMnožství odpadních polymerů každoročně stoupá a jejich recyklace je velmi důležitá. V dnešní době je největší část těchto odpadů ukládána na skládky nebo spalována. Tyto dvě metody však nejsou příliš vhodné (nedochází k chemickému ani energetickému využití materiálu) a nejsou ani šetrné k životnímu prostředí. Pyrolýza a ko-pyrolýza jsou vhodné recyklační metody umožňující přeměnu odpadních polymerů a uhlí na paliva s vyšším energetickým obsahem a jsou šetrné k životnímu prostředí. Pyrolýza a ko-pyrolýza vybraných polymerních materiálů s hnědým uhlím byla studována pomocí dynamické termogravimetrie na přístroji LECO TG-DTA STA 409 EP firmy NETZCH. Pyrolýza polymerů, kromě odpadních pneumatik, probíhala v jednom stupni a v užším teplotním intervalu než pyrolýza uhlí. Teplotní interval, kdy docházelo k pyrolýze polymeru i uhlí byl 200-600°C. V tomto teplotním intervalu byla rovněž studována kinetika ko-pyrolýzy a synergický efekt studovaných polymerů a hnědého uhlí. Nejvyšší pozitivní synergický efekt vedoucí ke zvýšení hmotnostního úbytku hnědého uhlí a rychlejší pyrolýzy při nižších teplotách měl ze studovaných polymerů polypropylen.

show abstract

Section: Tabsupporting

confidence: 78%

“…Many authors [5,6] studied the thermal decomposition of coal and plastic blends such as high density polyethylene and polypropylene using a thermogravimetric method. It was shown that plastic waste has strong influence on thermoplastic properties of coal as well as the structure and thermal behaviour of the semicoke.…”

Section: Introductionmentioning

confidence: 99%

Study of Pyrolysisis of Polymers and Coal and Co-Pyrolysis of Their Blends, Kinetics of the Process

Mikulová¹,

Večeř²,

Frantík³

2012

TransVSBms

View full text Add to dashboard Cite

show abstract

“…The first two of them form mainly volatile products during pyrolysis by the thermal decomposition of the sugar units. However, lignin molecules do not readily break and ultimately end up in char formation [4].…”

Section: Introductionmentioning

confidence: 99%

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

Rotliwala¹,

Parikh

2011

Korean J. Chem. Eng.

View full text Add to dashboard Cite

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.

show abstract

“…Major components of MSW are cellulose or lignin derived materials, polymer based material and inorganic material [1], followed by putrescible and incombustible [2]. Recycling processes for MSW can be performed in a variety of ways, ranging from mechanical, material or chemical recycling to energy recovery [3]. Two constraints affect the achievement of recycling targets: first, recycled materials are not suitable for the whole range of applications; and secondly, different components of wastes are not easily separated from the post-consumer stream [4].…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric characteristics and kinetic study of biomass co-pyrolysis with plastics

Chattopadhyay

Kim

et al. 2008

Korean J. Chem. Eng.

View full text Add to dashboard Cite

The pyrolysis of pure biomass, high density polyethylene (HDPE), polypropylene (PP) and polyethylene terephthalate (PET), plastic mixtures [HDPE+PP+PET (1 : 1 : 1)], and biomass/plastic mixture (9 : 1, 3 : 1, 1 : 1, 1 : 3 and 1 : 9) were investigated by using a thermogravimetric analyzer under a heating rate at 10 o C/min from room temperature to 800 o C. Paper was selected as the biomass sample. Results obtained from this comprehensive investigation indicated that biomass was decomposed mainly in the temperature range of 290-420 o C, whereas thermal degradation temperature of plastic mixture is 390-550 o C. The percentage weight loss difference (W) between experimental and theoretical ones was calculated, which reached a significantly high value of (−)15 to (−)50% at around 450 o C in various blend materials. These thermogravimetric results indicate the presence of significant interaction and synergistic effect between biomass and plastic mixtures during their co-pyrolysis at the high temperature region. With increase in the amount of plastic mixture in blend material, the char production has diminished at final pyrolysis temperature range. Additionally, a kinetic analysis was performed to fit with TGA data, the entire pyrolysis processes being considered as one or two consecutive first order reactions.

show abstract

Effects of plastic wastes on coal pyrolysis behaviour and the structure of semicokes

Cited by 88 publications

References 16 publications

Study of Pyrolysisis of Polymers and Coal and Co-Pyrolysis of Their Blends, Kinetics of the Process

Study of Pyrolysisis of Polymers and Coal and Co-Pyrolysis of Their Blends, Kinetics of the Process

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

Thermogravimetric characteristics and kinetic study of biomass co-pyrolysis with plastics

Contact Info

Product

Resources

About