Pyrolysis of lignocellulosic biomass with high-density polyethylene to produce chemicals and bio-oil with high liquid yields

Charusiri, Witchakorn; Phowan, Naphat; Vitidsant, Tharapong

doi:10.1016/j.scp.2021.100567

Cited by 7 publications

(11 citation statements)

References 33 publications

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“…Increasing the operating temperature also illustrated the higher liquid yield and diesel-like fraction due to the high reaction temperature dramatically promoting the catalytic pyrolysis of SLO/LDPE, which can be explained by the fact that temperature could be predominantly attributed to the enhancement of the acceleration of the carbon–carbon degradation of long-chain hydrocarbon compounds. Hydrogen radicals and hydrocarbon radicals produced the hydrogen gaseous product and enhanced the carbon–carbon scission of the long residue fraction (C 22 +) to smaller, hydrogenation, isomerization was also rearrangement of a middle hydrocarbon compound to the diesel-like fraction of C 12 –C 16 of linear alkane, ,,, which was achieved from the influence of both higher temperature and catalytic activity. However, it is notable that the gaseous yield was slightly increased from 25.06 wt % (400 °C) to 26.92 wt % (425 °C) and 31.45 wt % (450 °C).…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the gaseous product yield increased obviously with increasing process temperature from 450 to 475 °C, while a slight increase in the amount of carbonaceous material was obtained at 475 °C of approximately 5.62 wt %. It seems that the high process temperature enhanced the decomposition of SLO and LDPE to noncondensable gas products, which may be influenced by the gradual increase in carbonaceous at the acidic active site, resulting in deactivated catalytic performance. − Thus, thermal decomposition was only affected by the degradation of SLO and LDPE into smaller hydrocarbon gaseous products and further secondary cracking reactions into noncondensable gases, ,, which notably increased to 38.62 wt % at a reaction temperature of 475 °C.…”

Section: Resultsmentioning

confidence: 99%

“…The 5 wt % impregnated sFCC catalyst containing the largest amount of total acid sites represents the highest noncondensable gas yield of approximately 34.28 wt %, and it was found that the relation between the sFCC parent catalyst and Cu-impregnated catalyst was likely due to sFCC having strong Bronsted acid sites, ,,, which are more favorable for the catalytic cracking reaction of long-chain hydrocarbons to smaller hydrocarbon chains and rearranged its structure at the pore structure, including the catalytic reaction, e.g., hydrogenation, hydrocracking, and isomerization. An increase in Cu impregnation mainly has too many acidic active sites, which are extremely enhanced due to the cleavage of carbon–carbon bonds and carbon–hydrogen bonds in large hydrocarbon compounds, likely the long residue fraction into simple linear alkanes.…”

Section: Resultsmentioning

confidence: 99%

“…It seems that SLO had a more prominent effect on the lower ratio of LDPE blended in catalytic copyrolysis and showed the product distribution and the low selectivity of the diesel-like fraction, which was similar to the catalytic pyrolysis of SLO alone. 3,5,28,32,33 By increasing the ratio of SLO/LDPE from 0.9:0.1 to 0.7:0.3, it was found that the product distribution of the diesellike fraction was markedly increased from 18.33 to 23.11 wt % due to the thermal degradation of higher amounts of LDPE, which also increased the H-radicals and hydrocarbon radicals, enhancing the chain scission of LDPE and causing the production of medium hydrocarbon compounds. Herein, the H-donor from the thermal decomposition of LDPE enhances the carbon−carbon bond and carbon−hydrogen bond scission of SLOs from the initial thermal decomposition and enhances further catalytic reactions to produce smaller hydrocarbons.…”

Section: Influence Of the Reaction Time On The Product Yield Distribu...mentioning

confidence: 99%

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Catalytic Copyrolysis of Used Waste Plastic and Lubricating Oil Using Cu-Modification of a Spent Fluid Catalytic Cracking Catalyst for Diesel-like Fuel Production

Charusiri,

Phowan,

Permpoonwiwat

et al. 2023

ACS Omega

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This work provided catalytic copyrolysis of spent lubricating oil (SLO) with waste low-density polyethylene (LDPE) using copper modification of a spent fluid catalytic cracking (sFCC) catalyst to produce diesel-like fuels in a microbatch reactor, which will lead to effective waste management, ensure sustainability, and serve as an alternative energy source. The effects of LDPE blended with SLO, temperature, reaction time, and catalyst loading using an inert nitrogen atmosphere were investigated on the yields and distributions of copyrolyzed oil, while metal modification of the sFCC was prepared and used to investigate the catalytic activity. The temperature and time of reaction played an important role in the gaseous contribution to the pyrolysis of SLO. The addition of the LDPE ratio in the catalytic copyrolysis, including Cu loading on a spent FCC template, also enhanced the acidity and was responsible for the catalytic activity, which could improve the product distribution and chemical compounds in a range of diesel-like fuels. It was shown that the pyrolyzed oil was in the range of C7–C26 with a maximum diesel-like fraction of 23.11 ± 2.88 wt % compared with the catalytic pyrolysis of SLO alone, which contained a diesel-like fraction of only 12.45 ± 1.92 wt %. It was noticed that the acid active site of the catalyst resulted in a carbon–carbon bond cleavage and further secondary reaction, leading to the conversion of the long residue fraction into a light oil product. In addition, the LDPE ratio in the catalytic copyrolysis could improve the product distribution and chemical compounds in a range of diesel-like compounds, as confirmed by the GC/MS analysis. Catalytic copyrolysis oil of the optimal process condition (0.7:0.3 mass molar of SLO/LDPE, 450 °C, 60 min, 3 wt % Cu-sFCC, and 10 wt % catalyst loading) mainly contains light hydrocarbons in the C7–C19 range. Accordingly, both the product selectivity and the conversion of the long residue to the diesel-like fraction were nearly stable (59.01 ± 1.36%) during the catalyst reusability test from one to three cycles without regeneration and significantly decreased after the fifth cycle. This is an indication that the copyrolysis enhanced the conversion of SLO by LPDE blended into smaller hydrocarbon compounds, and the catalytic activity therefore showed a major tendency toward the formation of diesel-like fractions (C8–C18).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Influence Of the Reaction Time On The Product Yield Distribu...mentioning

confidence: 99%

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Catalytic Copyrolysis of Used Waste Plastic and Lubricating Oil Using Cu-Modification of a Spent Fluid Catalytic Cracking Catalyst for Diesel-like Fuel Production

Charusiri,

Phowan,

Permpoonwiwat

et al. 2023

ACS Omega

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“…Furthermore, copyrolysis also plays a positive role in improving bio-oil quality . Compared with bio-oil from individual pyrolysis of biomass, copyrolytic bio-oil has a more suitable chemical composition and higher heat value for use as fuel oil. , This is because polyolefin plastics change the H/C ratio of feedstock and promote the formation of hydrocarbons .…”

Section: Copyrolysis Of Biomass and Different Plasticsmentioning

confidence: 99%

Recent Advances and Perspectives of Copyrolysis of Biomass and Organic Solid Waste

Xing

et al. 2023

Energy Fuels

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Pyrolysis is one of the substantial thermal conversion technologies for high-value reutilization of biomass and organic solid waste (OSW). Adding some typical OSWs to biomass pyrolysis can achieve directional regulation of target products that are considered potential alternatives to fossil energy. Understanding copyrolysis behaviors is vital for the optimizing pyrolysis process to minimize environmental pollution and efficiently utilize biomass and OSW. However, there is no overall review on the copyrolysis of biomass and various OSWs. This paper reviews and discusses recent advances in the copyrolysis mechanism, thermal−chemical processes of some typical OSWs and biomass, and effects of chemical compositions of raw materials and pyrolysis parameters on thermal−chemical conversion behaviors, synergistic effect, and copyrolysis product characteristics. Recent reports show that the synergistic effect in copyrolysis effectively improves the quality of bio-oil and biochar. Moreover, adding OSW to biomass pyrolysis can promote the secondary reaction of pyrolysis intermediates. The reaction mechanism and relative numerical simulation work of copyrolysis are summarized. Finally, the current challenges to energy-and environment-oriented conversion of biomass and OSW are discussed, and perspectives for further developing the copyrolysis process are highlighted. This paper provides valuable information for optimizing sustainable copyrolysis processes of OSW and biomass and improving the efficiency and selectivity of recycled OSW.

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Biomethanol production from renewable resources: a sustainable approach

Subudhi,

Saha,

Mudgil

et al. 2023

Environ Sci Pollut Res

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Pyrolysis of lignocellulosic biomass with high-density polyethylene to produce chemicals and bio-oil with high liquid yields

Cited by 7 publications

References 33 publications

Catalytic Copyrolysis of Used Waste Plastic and Lubricating Oil Using Cu-Modification of a Spent Fluid Catalytic Cracking Catalyst for Diesel-like Fuel Production

Catalytic Copyrolysis of Used Waste Plastic and Lubricating Oil Using Cu-Modification of a Spent Fluid Catalytic Cracking Catalyst for Diesel-like Fuel Production

Recent Advances and Perspectives of Copyrolysis of Biomass and Organic Solid Waste

Biomethanol production from renewable resources: a sustainable approach

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