Origin of carbon in aromatic and olefin products derived from HZSM-5 catalyzed co-pyrolysis of cellulose and plastics via isotopic labeling

Dorado, Christina; Mullen, Charles A.; Boateng, Akwasi A.

doi:10.1016/j.apcatb.2014.07.006

Cited by 159 publications

(96 citation statements)

References 44 publications

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“…alcohols, span a carbon range of C8-C20. While the recent studies on co-pyrolysis of biomass and polymers have shown that the production of aromatics can be improved by using catalysts such as zeolites, [19][20][21][22][23] our study shows that non-catalytic copyrolysis is a promising upstream processing technique to improve the quality of the bio-oil. For example, at 600 C, the C8-C20 alcohol content followed the order: 36.32% (C : PP 25 : 75) > 33.74% (50 : 50) > 29.57% (75 : 25).…”

Section: Quality Of Co-pyrolysis Productsmentioning

confidence: 88%

“…The calculated product composition in the case of mixtures is based on the experimental product yields from fast pyrolysis of pure cellulose and PP according to the formula, Y calc.mix ¼ X cellulose Y expt.cellulose + X PP Y expt.PP . 22 Similarly, the reaction of alkenes with alcohol fragments and C2-C3 carbonyl and carboxylic acids can result in the formation of phenolic compounds. It is clear that the formation of hydrocarbons follows the calculated composition up to C : PP ratio of 50 : 50.…”

Section: Effect Of Feed Composition On Product Spectrummentioning

confidence: 99%

“…10,11,[14][15][16][17][18][19][20][21][22][23][24] In a series of studies, Sharypov and co-workers 11,14-16 evaluated the effects of feed composition and additives on the product yield and quality during copyrolysis of biomass and polymers in a rotating autoclave. 10,11,[14][15][16][17][18][19][20][21][22][23][24] In a series of studies, Sharypov and co-workers 11,14-16 evaluated the effects of feed composition and additives on the product yield and quality during copyrolysis of biomass and polymers in a rotating autoclave.…”

Section: Introductionmentioning

confidence: 99%

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Fast co-pyrolysis of cellulose and polypropylene using Py-GC/MS and Py-FT-IR

Ojha

Vinu

2015

RSC Adv.

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In this study, the production of high quality biofuel intermediates via fast co-pyrolysis of cellulose and polypropylene (PP) is investigated. Fast co-pyrolysis experiments were performed in a Pyroprobe® reactor and the generated vapors were analyzed using a gas chromatograph-mass spectrometer for the composition of pyrolysates, and Fourier transform infrared spectrometer for the time evolution of the key functional groups. The effects of cellulose : PP mass ratio (100 : 0, 75 : 25, 50 : 50, 25 : 75, 0 : 100) and temperature (500-800 C) on bio-oil composition, carbon number distribution of the products, higher heating value of the products, and temporal evolution of O-H, C-O, -CH 2 -, CO 2 and C]O groups were evaluated. Formation of long chain alcohols in the carbon number range of C8-C20 was observed as a result of the interaction of cellulose and PP. Feed composition played a decisive role in the formation of alcohols and hydrocarbons. A maximum of ca. 36% alcohols and 45% hydrocarbons were obtained from PP-rich mixture at 600 C. The yield of char decreased and that of the aromatic hydrocarbons increased with pyrolysis temperature. Significant improvement in the heating value of the products was observed when PP was blended with cellulose. Importantly, the calculated heating values correlated well with the cumulative content of alcohols, aliphatic and aromatic hydrocarbons. The addition of PP to cellulose significantly decreased the time taken for completion of pyrolysis. Based on the product distribution, hydroxyl, hydrogen and methyl abstraction were found to be the dominant reactions involved in the transformations.Fig. 3 Effect of temperature and cellulose : PP composition on carbon number distribution of the major products in bio-oil. Scheme 1 Proposed mechanism for the formation of alcohols during fast co-pyrolysis of cellulose and PP. 66866 | RSC Adv., 2015, 5, 66861-66870 This journal is

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Section: Quality Of Co-pyrolysis Productsmentioning

confidence: 88%

Section: Effect Of Feed Composition On Product Spectrummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fast co-pyrolysis of cellulose and polypropylene using Py-GC/MS and Py-FT-IR

Ojha

Vinu

2015

RSC Adv.

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“…13,[20][21][22] As a result, only $20-30% of the carbon contents of biomass feedstock can be converted into the nal aromatic hydrocarbons and olens in CFP. 21,[24][25][26] The results show that cofeeding of cellulose or pine wood with LDPE has a signicant synergy for aromatic production. 23 It was hypothesized that waste plastics may provide a cheap and abundant hydrogen source to improve the carbon efficiency of petrochemical production from CFP of biomass.…”

Section: Introductionmentioning

confidence: 88%

“…21,[24][25][26] The results show that cofeeding of cellulose or pine wood with LDPE has a signicant synergy for aromatic production. 21,[23][24][25] The results indicate that co-feeding of natural biomass (such as pine wood), which usually contains signicant cellulose contents ($40-50 wt%), with LDPE can thus provide a simple and effective way to improve aromatic production in CFP. However, the synergy for aromatic production is not insignicant for other combinations of biomass and plastics (cellulose/ polypropylene, cellulose/polystyrene, and lignin/LDPE).…”

Section: Introductionmentioning

confidence: 88%

Thermally stable phosphorus and nickel modified ZSM-5 zeolites for catalytic co-pyrolysis of biomass and plastics

Yao

Feng

et al. 2015

RSC Adv.

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A series of phosphorus (P) and phosphorus/nickel (P/Ni) modified ZSM-5 zeolites were prepared by impregnation of a conventional ZSM-5 zeolite with P and subsequent Ni. The conventional, P-, and P/Ni-modified ZSM-5 zeolites were then tested as the catalysts for petrochemical production from cofeed catalytic fast pyrolysis (CFP) of pine wood and low-density polyethylene (LDPE) mixtures. Results showed that the yield of valuable petrochemicals (olefins and aromatic hydrocarbons) from co-feed CFP increased from 42.9 C% for conventional ZSM-5 to 52.8-54.1 C% for P-and P/Ni-modified ZSM-5, while the yields of low-value alkanes and undesired char/coke decreased from 17.3 C% and 22.6 C% to 9.6-10.2 C% and 18.9-15.7 C%, respectively. ZSM-5 impregnation with P and P/Ni thus significantly improved the product distribution in co-feed CFP of biomass and LDPE. In addition, modification with P and P/Ni improved considerably the hydrothermal stability of zeolites to resist steam-induced catalyst deactivation that may occur in co-feed CFP. When the conventional ZSM-5 zeolite was pretreated with 100% steam at 550 C for 3-9 h, it produced 26.7-32.1% lower aromatic yields than untreated ZSM-5 in co-feed CFP. In contrast, steam pretreatment did not considerably affect the activity of P-and P/Ni-ZSM-5 zeolites for aromatic production. They maintained comparable aromatic yields in co-feed CFP when they had been steam pretreated for up to 9 h. These results indicate that ZSM-5 modification with P and P/Ni may provide a viable way to improve the catalyst's activity and life time for petrochemical production from co-feed CFP of biomass and plastics.

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Production of Aromatic Hydrocarbons from Co‐Hydropyrolysis of Biomass Components and HDPE with Application of Modified HZSM‐5 Catalyst

Ren,

Xu,

Chen

et al. 2024

Chemistry & Biodiversity

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Experiments were conducted in this study on the co‐hydropyrolysis of three components of biomass (cellulose, hemicellulose, and lignin) and HDPE by using SR‐Pd/Trap‐HZ‐5 as catalyst. To control the variable, we use the same experiment conditions in co‐hydropyrolysis: Si/Al ratio of 50, Pd load 1%, catalyst to reactant ratio of 1:10, 1 MPa, 400°C, reaction time 1 h. Use XRD, TEM, BET, and NH3‐TPD to confirm catalyst successful synthesis; use pine sawdust (PW) co‐hydropyrolysis with HDPE to analyse catalytic activity; and use GC/MS to characterize the chemical composition of the bio‐oil from the co‐hydropyrolysis of biomass components and HDPE. The results show that cellulose has a significant synergistic effect with aromatic hydrocarbon production, whose selectivity was 93.3%; hemicellulose has a synergistic effect; aromatic selectivity can reach 75.1%; and a negative synergistic effect between lignin and HDPE was shown as the selectivity of aromatic hydrocarbons decreased from 62.1% to 15.6%.

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Origin of carbon in aromatic and olefin products derived from HZSM-5 catalyzed co-pyrolysis of cellulose and plastics via isotopic labeling

Cited by 159 publications

References 44 publications

Fast co-pyrolysis of cellulose and polypropylene using Py-GC/MS and Py-FT-IR

Fast co-pyrolysis of cellulose and polypropylene using Py-GC/MS and Py-FT-IR

Thermally stable phosphorus and nickel modified ZSM-5 zeolites for catalytic co-pyrolysis of biomass and plastics

Production of Aromatic Hydrocarbons from Co‐Hydropyrolysis of Biomass Components and HDPE with Application of Modified HZSM‐5 Catalyst

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