Waste to energy conversion by stepwise liquefaction, gasification and \clean
                    combustion\ of pelletized waste polyethylene for electric power
                    generation

Anaraki, Saber Talebi

doi:10.17760/d20002925

Cited by 1 publication

(3 citation statements)

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“…Experiments were conducted at the aforementioned ethylene gas flow rate of 0.83 L/min and inert nitrogen flow rates varying by 3-fold. These findings of these experiments, in agreement with other pertinent findings elsewhere, showed that the addition of various amounts of nitrogen inert gas did not significantly affect the flammability of the ethylene gas in the nominally premixed burners used herein. , …”

Section: Methodssupporting

confidence: 92%

“…These findings of these experiments, in agreement with other pertinent findings elsewhere, 23 showed that the addition of various amounts of nitrogen inert gas did not significantly affect the flammability of the ethylene gas in the nominally premixed burners used herein. 24,38 The pyrolytic gasification chamber contained five perforated steel plates, placed at different axial locations in the furnace tube. The freefalling plastic pellets were intercepted by these plates and were heated, and as they melted, molten mass dripped through the plates, changing the state to liquid and then ultimately to gas.…”

Section: ■ Experimental Approachmentioning

confidence: 99%

“…Figure5. Demonstration of melting and dripping of polyolefins through the perforated plates used in the pyrolytic gasifier 24. This experiment was conducted at lower temperatures than those encountered in the pyrolytic gasifier.…”

mentioning

confidence: 99%

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Pyrolytic Gasification of Post-consumer Polyolefins To Allow for “Clean” Premixed Combustion

et al. 2013

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Utilization of post-consumer waste plastics as fuels is of technological interest because their energy contents (heating values) are comparable to those of premium fuels. Pyrolytic gasification of these solid polymers yields a mixture of predominately gaseous hydrocarbons and hydrogen. This gaseous fuel mixture can then be suitably blended with air and burned in well-controlled premixed flames. Such flames are much less polluting than diffusion flames, which would have been generated had the polymers been burned in their solid state. In this work, an apparatus was designed and built to continuously process polymers, in pelletized form, and to pyrolytically gasify them at temperatures in the range of 800−900°C in N 2 -or CO 2 -containing environments. Subsequently, the gaseous pyrolyzates were mixed with air, ignited, and burned in a Bunsen-type burner in a manner similar to natural gas. Polyethylene and polypropylene pyrolyzates burned with blue-tint flames akin to those of natural gas. The flames were fairly steady and nearly stoichiometric, generating effluents with low CO/CO 2 ratios. The combustion reactions released heat in a small water boiler coupled to a miniature steam engine, which produced electricity, illustrating the feasibility of "clean" power generation from waste plastics. Because pyrolysis of polyolefins requires a nominal heat input that amounts to only a minuscule fraction of the heat released during their combustion, large-scale implementation of this technique is deemed to be technologically viable and economically favorable.

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Section: Methodssupporting

confidence: 92%

Section: ■ Experimental Approachmentioning

confidence: 99%