Experimental study of catalytic pyrolysis of polyethylene and polypropylene over USY zeolite and separation to gasoline and diesel-like fuels

Kassargy, Chantal; Awad, Sary; Burnens, Gaëtan; Kahine, Khalil; Tazerout, Mohand

doi:10.1016/j.jaap.2017.09.005

Cited by 100 publications

(49 citation statements)

References 30 publications

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“…The higher char/coke content can also be linked to the catalytic activity of the catalyst. HY is very active even at relatively low temperatures and effective in the initial degradation due to its higher surface area and acid site density [31,[42][43][44][45]. In the presence of co-pressing method, HY produces higher amount of coke/char at lower temperatures and emits higher amount of volatiles during the coke/char stabilization at higher temperatures [46].…”

Section: Experimental Results From Tga Of Thermal and Catalytic Degradation Of Cellulosementioning

confidence: 99%

Improving the Conversion of Biomass in Catalytic Pyrolysis via Intensification of Biomass—Catalyst Contact by Co-Pressing

Muhammad

Manos

2021

Catalysts

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Biomass pyrolysis is a promising technology for fuel and chemical production from an abundant renewable source. It takes place usually in two stages; non-catalytic pyrolysis with further catalytic upgrading of the formed pyrolysis oil. The direct catalytic pyrolysis of biomass reduces the pyrolysis temperature, increase the yield to target products and improves their quality. However, in such one-stage process the contact between biomass and solid catalyst particles is poor leading to an excessively high degree of pure thermal pyrolysis reactions. The aim of this study was to enhance the catalyst-biomass contact via co-pressing of biomass and catalyst particles as a pre-treatment method. Catalytic pyrolysis of biomass components with HY and USY zeolites was studied using thermogravimetric analysis (TGA), as well as experiments in a pyrolysis reactor. The liquid and coke yields were characterized using gas chromatography, and TGA respectively. The TGA results showed that the degradation of the co-pressed cellulose occurred at lower temperatures compared to the pure thermal degradation, as well as catalytic degradation of non-pretreated cellulose. All biomass components produced better results using the co-pressing method, where the liquid yields increased while coke/char yields decreased. Bio-oil from catalytic pyrolysis of cellulose with HY catalyst mainly produced heavier fractions, while in the presence of USY catalyst medium fraction was mainly produced within the gasoline range. For hemicellulose catalytic pyrolysis, the catalysts had similar effects in enhancing the lighter fraction, but specifically, HY showed higher selectivity to middle fraction while USY has produced higher percentage of lighter fraction. Using with both catalysts, co-pressing had the best effect of eliminating the heavier fraction and improving the gasoline range fraction. Spent catalyst from co-pressed sample had lower concentrations of coke/char components due to the shorter residence times of volatiles, which suppresses the occurrence of secondary reactions leading to coke/char formations.

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Section: Experimental Results From Tga Of Thermal and Catalytic Degradation Of Cellulosementioning

confidence: 99%

Improving the Conversion of Biomass in Catalytic Pyrolysis via Intensification of Biomass—Catalyst Contact by Co-Pressing

Muhammad

Manos

2021

Catalysts

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“…In the S2 sample, the chloride groups are shown in 1686.57 cm −1 , possibly attributed to the UV-327. In the case of the S3 sample, the bands show additives such as alcohols, phenols, and chlorinated acids (Kassargy et al, 2017). Considering that the samples will be subjected to thermal pyrolysis, it is emphasized that in the case of S1 there is no generation of hydrochloric acid; this represents an advantage since the products of pyrolysis are nonhalogenated hydrocarbons that can be used as fuels.…”

Section: Ft-ir Analysis Of Ppmentioning

confidence: 99%

Thermic pyrolysis of polypropylene waste as a source of fuel

Palmay

Morocho-Delgado²,

Puente-Guijarro³

et al. 2021

RMIQ

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“…One category is about the research of blended combustion for the internal combustion engine [23,24]. The other category is about the research of product optimization for oil processing [25,26]. The research with the keywords of the ratio of gasoline to diesel ratio (or something like this) seldom belongs to the field of macroeconomics.…”

Section: Literature Reviewmentioning

confidence: 99%

Gasoline to Diesel Consumption Ratio: A New Socioeconomic Indicator of Carbon Dioxide Emissions in China

Sun

Qin

et al. 2020

Sustainability

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In recent years, gross domestic product (GDP) has grown rapidly in China, but the growth rate of carbon dioxide (CO2) emissions has begun to decline. Some scholars have put forward the environmental Kuznets curve (EKC) hypothesis for CO2 emissions in China. This paper utilized the panel data of 30 provinces in China from 1997 to 2016 to verify the EKC hypothesis. To explore the real reasons behind the EKC, the index gasoline to diesel consumption ratio (GDCR) was introduced in this paper. The regression results showed that CO2 emissions and GDP form an inverted U-shaped curve. This means that the EKC hypothesis holds. The regression results also showed that a 1% GDCR increase was coupled with a 0.118186% or 0.114056% CO2 emission decrease with the panel fully modified ordinary least squares or panel dynamic ordinary least squares method, respectively. This means that CO2 emissions negatively correlate with GDCR. From the discussion of this paper, the growth rate reduction of CO2 emissions is caused by the economic transition in China. As changes of GDCR can, from a special perspective, reflect the economic transition, and as GDCR is negatively correlated with CO2 emissions, GDCR can sometimes be used as a new socioeconomic indicator of carbon dioxide emissions in China.

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Experimental study of catalytic pyrolysis of polyethylene and polypropylene over USY zeolite and separation to gasoline and diesel-like fuels

Cited by 100 publications

References 30 publications

Improving the Conversion of Biomass in Catalytic Pyrolysis via Intensification of Biomass—Catalyst Contact by Co-Pressing

Improving the Conversion of Biomass in Catalytic Pyrolysis via Intensification of Biomass—Catalyst Contact by Co-Pressing

Thermic pyrolysis of polypropylene waste as a source of fuel

Gasoline to Diesel Consumption Ratio: A New Socioeconomic Indicator of Carbon Dioxide Emissions in China

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