Understanding of synergy in non-isothermal microwave-assisted in-situ catalytic co-pyrolysis of rice husk and polystyrene waste mixtures
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Date
2022
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Publisher
Elsevier Ltd
Abstract
Rice husk (RH) and polystyrene (PS) wastes were converted into value-added products using microwave-assisted catalytic co-pyrolysis. The graphite susceptor (10 g) along with KOH catalyst (5 g) was mixed with the feedstock to understand the products and energy consumption. RH promoted the char yield (20–34 wt%) and gaseous yields (16–25 wt%) whereas PS enhanced the oil yield (23–70 wt%). Co-pyrolysis synergy induced an increase in gaseous yields (14–53 wt%) due to excessive cracking. The specific microwave energy consumption dramatically decreased in co-pyrolysis (5–22 kJ/g) compared to pyrolysis (56–102 kJ/g). The pyrolysis index increased (17–445) with the increase in feedstock quantity (5–50 g). The obtained oil was composed of monoaromatics (74%) and polyaromatics (18%). The char was rich in carbon content (79.5 wt%) and the gases were composed of CO (24%), H<inf>2</inf> (12%), and CH<inf>4</inf> (22%). © 2022 Elsevier Ltd
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Keywords
Energy utilization, Feedstocks, Microwaves, Potassium hydroxide, Pyrolysis, Copyrolysis, Energy-consumption, Microwave-assisted, Nonisothermal, Polystyrene waste, Rice husk, Susceptors, Synergistic effect, Value added products, Waste mixtures, Polystyrenes, aliphatic hydrocarbon, aromatic compound, biogas, carbon, charcoal, cycloalkane, cycloalkene, polystyrene, zeolite, polystyrene derivative, catalyst, Article, catalysis, chemical composition, controlled study, cross validation, energy consumption, environmental temperature, gas, heating, k fold cross validation, machine learning, mass fragmentography, microwave radiation, pyrolysis, rice husk, support vector machine, valorization, waste, heat, Oryza, Catalysis, Gases, Hot Temperature
Citation
Bioresource Technology, 2022, 360, , pp. -