The role of CaO in the steam gasification of plastic wastes recovered from the municipal solid waste in a fluidized bed reactor

Lazzarotto, Ivan Pedro; Ferreira, Suelem Daiane; Junges, Janaína; Bassanesi, Gabriela Reginato; Manera, Christian; Perondi, Daniele; Godinho, Marcelo

doi:10.1016/j.psep.2020.04.009

Cited by 62 publications

(16 citation statements)

References 26 publications

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“…These results indicate that the absorption of CO 2 by Ca(OH) 2 affects the rate of H 2 production. This situation has been reported in several previous studies (Hwang, Kobayashi, and Kawamoto, 2014;Chen et al, 2017;Lazzarotto et al, 2020). The reaction between Ca(OH) 2 and CO 2 formed CaCO 3 according to the Ca(OH) 2 carbonation reaction (R5).…”

Section: The Effect Of Co 2 Absorption By Ca(oh) 2 On Gas Compositionsupporting

confidence: 82%

Purification of Synthetic Gas from Fine Coal Waste Gasification as a Clean Fuel

Faizal¹,

Said²,

Nurisman³

et al. 2021

J. Ecol. Eng.

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The presence of CO 2 in the syngas is attracting more attention in terms of reducing the greenhouse gas emissions in its utilisation. The aim of this study was to purify syngas from the CO 2 content of fine coal gasification. Fine coal is gasified with and without absorption using CaO, which is hydrated to Ca(OH) 2 in the modified updraft gasifier at 450-700 °C. Apart from investigating the CO 2 absorption process, the gasification process also evaluates the influence of temperature in terms of its synergy with Ca(OH) 2 . The best conditions for the gasification process are achieved at 700 °C. The content of CO 2 was proven to be well absorbed, which is characterised by a decrease in the CO 2 content and an increase in H 2 in syngas. After the absorption process, the H 2 content obtained increased from 42.6 mole% to 48.8 mole% of H 2 at 700°C. The H 2 ratio also increased after absorption to 2.57 from the previous value of 2.23. The highest absorption efficiency of CO 2 by Ca(OH) 2 occurred at 700°C at 50.63%. With an increase in temperature in the gasification process with absorption, the CO 2 content decreased dramatically from 16.9 mole% to 3.9%. Ca(OH) 2 has good absorption power at CO 2 at high temperatures.

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Section: The Effect Of Co 2 Absorption By Ca(oh) 2 On Gas Compositionsupporting

confidence: 82%

Purification of Synthetic Gas from Fine Coal Waste Gasification as a Clean Fuel

Faizal¹,

Said²,

Nurisman³

et al. 2021

J. Ecol. Eng.

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“… 19 − 22 The higher carbon and hydrogen content of waste plastics increases H 2 production to values above 10 wt % when they are valorized by steam gasification. 23 − 25 …”

Section: Introductionmentioning

confidence: 99%

“…Steam gasification has been widely studied in the literature for the valorization of biomass and waste plastics, since it can generate H 2 -rich syngas ,, and the gaseous products can be directly used as fuel or intermediate products in the large scale chemical and fuel production. , The main challenge of gasification processes involves the quality of the syngas and its tar content and, in fact, remarkable research efforts have been made to improve tar elimination processes. − Thus, it is well-established that an optimized gasifier and a highly active catalyst can efficiently contribute to biomass tar elimination . Under suitable operating conditions and using appropriate catalysts, biomass steam gasification allows obtaining H 2 productions in the 5–7 wt % range. − The higher carbon and hydrogen content of waste plastics increases H 2 production to values above 10 wt % when they are valorized by steam gasification. − …”

Section: Introductionmentioning

confidence: 99%

Progress on Catalyst Development for the Steam Reforming of Biomass and Waste Plastics Pyrolysis Volatiles: A Review

et al. 2021

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In recent decades, the production of H 2 from biomass, waste plastics, and their mixtures has attracted increasing attention in the literature in order to overcome the environmental problems associated with global warming and CO 2 emissions caused by conventional H 2 production processes. In this regard, the strategy based on pyrolysis and in-line catalytic reforming allows for obtaining high H 2 production from a wide variety of feedstocks. In addition, it provides several advantages compared to other thermochemical routes such as steam gasification, making it suitable for its further industrial implementation. This review analyzes the fundamental aspects involving the process of pyrolysis-reforming of biomass and waste plastics. However, the optimum design of transition metal based reforming catalysts is the bottleneck in the development of the process and final H 2 production. Accordingly, this review focuses especially on the influence the catalytic materials (support, promoters, and active phase), synthesis methods, and pyrolysis-reforming conditions have on the process performance. The results reported in the literature for the steam reforming of the volatiles derived from biomass, plastic wastes, and biomass/plastics mixtures on different metal based catalysts have been compared and analyzed in terms of H 2 production.

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“…Para realizar este tipo de tratamiento sobre los residuos plásticos es importante conocer el monómero de partida, entender su estructura, comportamiento frente al calor y biodegradabilidad (Kasar et al, 2020). Este proceso cuenta con cuatro metodologías de valorización, las cuales son la pirólisis (Conesa & Martin, 2009), la hidrogenación (Baena et al, 2020), la gasificación (Lazzarotto et al, 2020) y la metanólisis (Samak et al, 2020), de todas ellas, la más utilizada en la actualidad debido al potencial para obtener compuestos con valor energético es la pirólisis (Jha & Kannan, 2020;Chen et al, 2021).…”

Section: Reciclaje Químicounclassified

Valorización de Residuos de Bagazo de Caña y Plásticos para la Generación de Compuestos Energéticos

Correa-Gallego¹,

Villegas-Bolaños²

2021

Producción + Limpia

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El consumo desmedido y la demanda energética a nivel mundial han generado la necesidad de incorporar los desechos plásticos y de origen agroindustrial a procesos de valorización, para obtener productos energéticos alternativos a partir de tratamientos termoquímicos como la pirólisis rápida, en la cual se generan productos sólidos, líquidos y gaseosos. Desarrollar metodologías que permitan realizar un reciclaje y/o aprovechamiento de residuos generados de diversas industrias, en específico, la polimérica y la agroindustrial, es de suma importancia, dada la contaminación crónica y el impacto ambiental en ecosistemas naturales, cuerpos hídricos y fauna. El objetivo de este artículo es analizar los impactos ambientales de la alta generación de residuos plásticos y agroindustriales, así como determinar la relación entre las condiciones de operación y el rendimiento y selectividad de los productos generados con las características fisicoquímicas de los catalizadores empleados en la pirólisis rápida en pro de la valorización de dichos residuos. Lo anterior se realizó mediante una revisión de la literatura en bases de datos reconocidas para obtener artículos de investigación actualizados y con validez científica. Se encontró que la pirólisis catalizada presenta una mejora respecto al rendimiento y distribución de los productos según la fase activa seleccionada en la que la naturaleza de los metales usados conduce a diversas rutas químicas y por ende, a productos ricos en hidrocarburos.

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The role of CaO in the steam gasification of plastic wastes recovered from the municipal solid waste in a fluidized bed reactor

Cited by 62 publications

References 26 publications

Purification of Synthetic Gas from Fine Coal Waste Gasification as a Clean Fuel

Purification of Synthetic Gas from Fine Coal Waste Gasification as a Clean Fuel

Progress on Catalyst Development for the Steam Reforming of Biomass and Waste Plastics Pyrolysis Volatiles: A Review

Valorización de Residuos de Bagazo de Caña y Plásticos para la Generación de Compuestos Energéticos

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