Feedstock recycling of plastic wastes/oil mixtures in cokemaking

Díez, M.A.; Álvarez, R.; Melendi, Sonia; Barriocanal, C.

doi:10.1016/j.fuel.2009.03.035

Cited by 40 publications

(24 citation statements)

References 20 publications

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“…In agreement with previous results [4,[7][8][9][10][11], the extent of the fluidity reduction is dependent on the composition of the waste. The reduction was greater (60% vs. 50% of initial coal fluidity) when a waste containing a total amount of 35% of aromatic polymers (PET and PS) was added (Figure 1).…”

Section: Resultssupporting

confidence: 93%

“…Due to the compatibility of the aromatic hydrocarbons and the coal, the coking properties of the coal blend are enhanced. Oils R and T which contain long-chain aliphatic hydrocarbons behave differently [8]. While oil T presents a maximum evolution of hydrocarbons at 432 ºC, oil R contains lower-boiling hydrocarbons and maximum distillation occurs at 363 ºC.…”

Section: Resultsmentioning

confidence: 99%

“…Another possibility is to use other hydrocarbon sources in order to reduce the high level of viscosity of the melted plastics. In a recent study, it has been found that petroleum-based oils act as efficient solvents of the melted polyolefins and that they are able to reduce the coking pressure while the quality of the coke is maintained or even slightly improved [8].…”

Section: Introductionmentioning

confidence: 99%

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Plastic wastes, lube oils and carbochemical products as secondary feedstocks for blast-furnace coke production

Melendi

Díez

Álvarez

et al. 2011

Fuel Processing Technology

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Plastic wastes, lube oils and coal-tar are evaluated, individually and combined, as additives to coal blends for the production of blast-furnace coke. The effects of adding 2 wt% of potential additives or their mixtures (50:50 w/w) on the coking capacity of coal, the pressure generated during the coking process and the coke quality parameters were evaluated. Using a combination of polyolefin waste and lubricating oil with high-boiling hydrocarbons has the beneficial effect of reducing the coking pressure generated by polyolefins without any significant deterioration in coke quality.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Plastic wastes, lube oils and carbochemical products as secondary feedstocks for blast-furnace coke production

Melendi

Díez

Álvarez

et al. 2011

Fuel Processing Technology

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“…At the same time, cokemaking is a process where the recycling of wastes is possible, especially high carbon and low ash wastes like sawdust and charcoal [5][6][7][8][9], plastics [10][11][12], and bituminous wastes [13][14][15]. Thus recycling in the cokemaking industry could provide a way to reduce the environmental impact of CO 2 emissions, reduce costs and widen the raw materials spectrum to include non-fossil fuels.…”

Section: Introductionmentioning

confidence: 99%

Effect of briquette composition and size on the quality of the resulting coke

Montiano

Díaz-Faes

Barriocanal

2016

Fuel Processing Technology

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Five briquettes were prepared using sawdust, a non-coking coal and a binder.Industrial coal blends were used to study the influence of the type of sawdust (pine and chestnut), the binder (coal tar and coal-tar sludge) and the size of the briquettes on the quality of the cokes produced from mixtures containing up to 15 wt.% of the five briquettes. The effect of the briquettes and briquette components on the fluidity of the industrial coal blends was investigated. It was found that biomass and non-coking coal produced a decrease in fluidity, whereas the binders increased it. The combined effect of both types of additive had the global effect of decreasing fluidity. Mixtures of the briquettes with the industrial coal blends were carbonized in a 17 kg movable wall oven in order to assess their influence on the quality of the cokes produced. Their cold mechanical strength (JIS DI150/15 index), reactivity to CO 2 (CRI index) and postreaction strength (CSR index) were also tested. The composition of the ash of the sawdusts and the reactivity of the briquette components were used as an indication of the effect on coke reactivity. The effects on cold mechanical strength and post-reaction strength were different in some cases.

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“…As for the effect of plastic type, there have been many studies on the influence of plastic addition on coal-caking property and coke quality [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. It was revealed that thermal decomposition products of plastics interacted with bituminous coal during carbonization in a coke oven.…”

Section: Influence Of Plastic Addition On Coke Qualitymentioning

confidence: 99%

Use of Waste Plastics in Coke Oven: A Review

Nomura

2015

J. Sustain. Metall.

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To help in building a recycling-oriented sustainable society, Nippon Steel & Sumitomo Metal Corporation developed a waste plastic-recycling process using coke oven and put it into commercial operation in 2000. Now roughly 200,000 tons per year of waste plastics are processed in coke oven in Japan. In this process, the waste plastics collected from households are agglomerated to the sizes ranging from 20 to 30 mm in diameter and charged into coke ovens with coal at the blending ratio of about 1 mass%. Waste plastics are thermally decomposed into approximately 20 mass% coke, 40 mass% hydrocarbon oil (tar and light oil) and 40 mass% coke oven gas, which are utilized as iron ore-reducing agents in blast furnaces, raw materials for the chemical industry, and a fuel for power plants, respectively. Moreover, 92 mass% of the chlorine in waste plastics is released and absorbed by the ammonia liquor spray for cooling hot coke oven gas and converted to ammonium chloride. The waste plastic-recycling process using coke ovens is superior in that a large amount of waste plastics can be treated, useful materials can be recovered using the existing facilities, coke quality can be kept the same and the chlorine released from waste plastics can be fixed in the existing ammonia liquor spray system.

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Feedstock recycling of plastic wastes/oil mixtures in cokemaking

Cited by 40 publications

References 20 publications

Plastic wastes, lube oils and carbochemical products as secondary feedstocks for blast-furnace coke production

Plastic wastes, lube oils and carbochemical products as secondary feedstocks for blast-furnace coke production

Effect of briquette composition and size on the quality of the resulting coke

Use of Waste Plastics in Coke Oven: A Review

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