Total utilization of waste tire rubber through pyrolysis to obtain oils and CO2 activation of pyrolysis char

Choi, Gi Sang; Jung, Su-Hwa; Oh, Seung‐Jin; Kim, Joo-Sik

doi:10.1016/j.fuproc.2014.02.007

Cited by 153 publications

(94 citation statements)

References 44 publications

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“…During pyrolysis, reactions of the formation and consumption of sulphur compounds takes place and those reactions can be temperature-dependent [26]. In this study, the values of the sulphur in the liquid fraction obtained without a hydrogen stream are similar to the sulphur content found in other studies of pyrolysis of tyre rubber at the final temperature of 500 • C in a nitrogen atmosphere [21]. High temperatures in the reactor and the constant flow of hydrogen led to a desulphurization process.…”

Section: Effect Of Pyrolysis Condition On the Pyrolytic Liquid Fuelsupporting

confidence: 84%

“…In this range, volatiles present in rubbers (e.g., oil, plasticizer and additives) decomposed at around 300-350 • C, which explains the abundant formation of gas in the reactor [20]. In the present study, the formation of gases attributed to volatile organic vapors occurred at lower temperatures in the range of 220-250 • C. Similarly, Choi [21] and Seidelt [16] proposed that between 300-450 • C the decomposition of NR and BR rubber components are more likely to occur; and the decomposition of SBR are usually reported to occur in the range of 400-500 • C [16]. Herein, the decomposition of NR, BR and SBR also occurred at lower temperatures, as discussed previously, and in accordance with other studies that have also demonstrated degradation of those types of synthetic rubbers at lower temperatures [11].…”

Section: Production Of Pyrolytic Productssupporting

confidence: 54%

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Decomposition of Used Tyre Rubber by Pyrolysis: Enhancement of the Physical Properties of the Liquid Fraction Using a Hydrogen Stream

2018

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Abstract:The disposal of discarded tyres represents an environmental challenge for solid waste management entities. The need to reduce solid waste in urban areas along with the depletion of natural resources have made it necessary to reincorporate used materials into productive processes, giving value to what is considered waste, and minimizing the requirement of natural resources. In this study, pyrolysis was selected to thermally decompose used ground waste vulcanized rubber from automobile tyres. This rubber was exposed to the pyrolytic process in an indirectly heated batch reactor at three different temperatures. Three fractions (i.e., gas, liquid and solid) were obtained during the process. The effect of a hydrogen stream on the properties of the liquid fraction was analysed and characterized following the American Society for Testing and Materials procedures (ASTM) for the pyrolysis of liquid fuels. A multifactorial statistical analysis was used to evaluate the experimental data and thermographs of the process were recorded. Differences in thermographs suggest a different degradation pathway for the rubber exposed to 600 • C compared to the rubber exposed to lower temperatures. Temperatures in the range of 450 to 500 • C favored the production of carbon black regardless of the use of a hydrogen stream. In contrast, high temperatures favored the production of liquid and gas fractions. The highest production of liquid fraction was obtained at 550 • C, where 37% of the rubber was turned into liquid. Results also showed that a constant flow of hydrogen improves the appearance of the pyrolysis liquid. Furthermore, the hydrogen atmosphere reduces the sulphur content, water and sediments; and increases the values for the heat of combustion and the liquid fraction.

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Section: Effect Of Pyrolysis Condition On the Pyrolytic Liquid Fuelsupporting

confidence: 84%

Section: Production Of Pyrolytic Productssupporting

confidence: 54%

Decomposition of Used Tyre Rubber by Pyrolysis: Enhancement of the Physical Properties of the Liquid Fraction Using a Hydrogen Stream

2018

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“…W związku z tym najczęściej nie mogą być bezpośrednio wykorzystane, np. jako paliwo silnikowe [3][4][5]. Olej popirolityczny wyjątkowo może być zamiennikiem oleju opałowego, pod warunkiem wyselekcjonowania tych partii towaru, które spełniają normy przewidziane dla oleju opałowego.…”

Section: Wprowadzenieunclassified

Zarządzanie emisją z olejów opałowych zawierających frakcję oleju popirolitycznego

Łaczek

Badawczy²

2018

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Zarządzanie emisją z olejów opałowych zawierających frakcję oleju popirolitycznego Artykuł przedstawia możliwości wykorzystania frakcji popirolitycznej jako samoistnego paliwa lub jako komponentu olejów opałowych na podstawie uzyskanych wyników z badań i pomiarów emisji składników gazowo-pyłowych do atmosfery. Zarządzanie powstającymi emisjami pozwoli uzyskać informację na temat przebiegu procesu spalania skomponowanych paliw (zawierających frakcję popirolityczną) oraz porównać wielkości emitowanych zanieczyszczeń tego typu paliwa z tradycyjnymi olejami opałowymi.Słowa kluczowe: emisja zanieczyszczeń do atmosfery, olej popirolityczny, piroliza zużytych opon. Managing emissions from heating fuels containing a fraction of post-pyrolithic oilThe article presents the possibility of using a post-pyrolithic fraction as a spontaneous fuel, or as a component of heating fuels, based on the obtained measurements of emission of gaseous and particulate components into the atmosphere. Management of the resulting emissions will allow to obtain information on the combustion process of the composed fuels (containing postpyrolithic fraction) as well as the comparison of the amount of pollutants by this type of fuel with conventional heating oils.Key words: emission of pollutants into the atmosphere, post-pyrolithic oil, pyrolysis of used tires.

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“…Toda a estrutura metálica dos rejeitos de borracha pode ser recuperada depois da pirólise e reutilizada na produção de novas peças (como por exemplo peneiras e moinhos) ou mesmo recicladas na produção de novos aços. As frações líquidas e gasosas constituídas essencialmente de hidrocarbonetos podem ser utilizadas como combustíveis [12][13][14][15] . Neste contexto, a obtenção de combustíveis para mineradoras localizadas em áreas remotas a partir da pirólise de seus rejeitos é de grande interesse, visto que essas mineradoras são consumidoras intensivas de combustíveis, por exemplo diesel, que representa um custo elevado devido às longas distâncias.…”

Section: Introductionunclassified

Pirólise de resíduos de borrachas do setor de mineração para a produção de combustíveis: estudos em escala piloto

et al. 2017

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ResumoNeste trabalho, estudou-se em escala piloto a pirólise de três diferentes rejeitos de borracha do setor de mineração, i.e. peças de moinho de composição nominal de borracha estireno e butadieno (SBR), peneiras e correias transportadoras com composição nominal à base de borracha natural e butadieno (NR/BR) e pneus offroad de composição complexa (mistura de borracha natural, nitrílica, butadieno e estireno-butadieno) em temperaturas de 450, 600 e 800°C. As reações realizadas a 450°C mostraram uma pirólise incompleta, sendo que a 600 e 800°C os rejeitos de borracha se convertem totalmente em três produtos: 15-25% de gás, 42-44% sólido e 34-45% de líquido. Análises por cromatografia gasosa (CG) dos produtos gasosos mostraram majoritariamente a presença de hidrocarbonetos C 1 -C 4 com valores de poder calorífico inferior (PCI) iguais a 8.496 e 7.325 kcal kg -1 , similares ao gás liquefeito de petróleo (GLP). Análise dos sólidos obtidos por análise elementar de carbono, hidrogênio e nitrogênio (CHN), espectrômetria de emissão atômica com plasma induzido (ICP-AES) Spectro Ciros CCD para a determinação de enxofre, análise térmica gravimétrica e diferencial (TG/DTA), carbono fixo, cinzas, voláteis mostraram a presença de 72-89% de carbono com 2% de enxofre. Análises dos produtos líquidos por cromatografia gasosa acoplado a espectrometria de massas (CG-EM) indicaram a presença de misturas complexas de hidrocarbonetos majoritariamente até C20. As amostras NR/BR e pneu produzem líquidos com concentração de compostos aromáticos próxima a 50%, enquanto a amostra SBR resulta na formação de um líquido de concentração próxima a 87%. A mistura dessa fração líquida obtida pela pirólise (sem qualquer purificação) com um diesel comercial nas proporções de 0,5, 1 e 3 vol% mostrou que nenhum parâmetro de qualidade de combustível definido pela ANP (Agência Nacional do Petróleo, Gás Natural e Biocombustíveis) foi alterado significativamente. Palavras-chave: resíduos de borracha, mineração, pirólise. AbstractIn this work, the pyrolysis of three different rubber wastes used in the mining industry, i.e. milling (based on styrene butadiene rubber, SBR), sieves and conveyor belts (based on natural and butadiene rubber, NR/BR) and offroad waste tires (based on complex mixture of nitrile, butadiene, styrene and natural rubber) was investigated in a pilot plant at 450, 600 and 800°C. Reactions at 450°C showed incomplete pyrolysis whereas at 600 and 800°C the rubber wastes were completely converted into three products:15-25% gas, 34-45% liquid and 42-44% solids. The gas products analyzed by gas chromatography (GC) showed mainly the presence of C 1 -C 4 hydrocarbons with LHV (Low Heating Value) values between 8496 and 7325 Kcal kg -1 , similar to liquefied petroleum gas (LPG). The solid products analyzed by elemental analysis of carbon, hydrogen and nitrogen (CHN), atomic emission spectrometry with inductively coupled plasma (ICP-AES) Spectro Ciros CCD for the determination of sulfur, thermogravimetry and differential thermal analysis (TG/D...

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Total utilization of waste tire rubber through pyrolysis to obtain oils and CO2 activation of pyrolysis char

Cited by 153 publications

References 44 publications

Decomposition of Used Tyre Rubber by Pyrolysis: Enhancement of the Physical Properties of the Liquid Fraction Using a Hydrogen Stream

Decomposition of Used Tyre Rubber by Pyrolysis: Enhancement of the Physical Properties of the Liquid Fraction Using a Hydrogen Stream

Zarządzanie emisją z olejów opałowych zawierających frakcję oleju popirolitycznego

Pirólise de resíduos de borrachas do setor de mineração para a produção de combustíveis: estudos em escala piloto

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