Influence of impregnated iron and nickel on the pyrolysis of cellulose

Collard, François–Xavier; Bensakhria, Ammar; Drobek, Martin; Volle, Ghislaine; Blin, Joël

doi:10.1016/j.biombioe.2015.04.032

Cited by 59 publications

(37 citation statements)

References 50 publications

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“…With regard to other compounds, metals catalyze a pathway that promotes the formation of ketones, esters and carboxylic acids. Since carboxylic acids are considered to be an important source of CO 2, it can be inferred that metals can promote the formation of certain carboxylic acid functions . This is also the reason for the increase in gas content.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, Meta inorganic minerals are the integral part of biomass material. These inorganic minerals are known to influence the thermal decomposition of biomass; even very small amounts can significantly alter the composition and distribution of the pyrolysis products . Previous works have clearly demonstrated that the inorganic minerals in biomass increase the yields of gas and char at the expense of bio‐oil yield .…”

Section: Introductionmentioning

confidence: 99%

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Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

et al. 2020

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The present work aims to investigate the thermal behavior, kinetics, thermodynamics, and product distribution during copyrolysis of transition metal salt (Ni, Co, Zn, Cu, and Fe)-added biomass and model compounds with low density polyethylene(LDPE) over a Ni-based HZSM-5 catalyst by TGA and fixed bed reactor. The interactions and reaction mechanisms during copyrolysis were evaluated. The influence of Ni-impregnated biomass (C-M) and Nimodified HZSM-5 (Ni/HZ) on the formation of pyrolysis bio-oil from biomass and model compounds and its subsequent effect on catalytic pyrolysis vapor upgrading was discussed. The results indicated that the presence of transition metal decreased the thermal degradation temperature and thermodynamics parameters; maximum decomposition rate, and reaction complexity. Ni/HZ catalyst could further decrease the activation energy, accelerate the reaction rate and change reaction process, and the modified samples/LDPE under copyrolysis with HZSM-5 catalyst presented a more significant effect than Ni/HZ catalyst. Subsequently, the Ea of pine, cellulose and lignin changed from 24.11, 18.29, and 28.68 kJ/mol (CP@Ni/HZ) to 56.04, 69.84, and 16.21 kJ/mol (CP-Ni@HZSM-5), respectively. In addition, Ni could inhibit the depolymerization of cellulose and promoted the formation of char, coke, and lignin derived phenolics. And Ni-impregnated biomass reduced the formation of desired aromatic hydrocarbons, but result in increasing of the char and non-condensable gases. But Ni/HZ catalysts promote the conversion of biomass to target products.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

et al. 2020

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“…Many different types of catalysts have been tested in biomass catalytic pyrolysis, including zeolites, metal oxides, metal salts, and bifunctional catalysts . The two major factors influencing the product distribution and yields are acidity and porous properties .…”

Section: Catalytic Pyrolysismentioning

confidence: 99%

Advanced biofuels production by upgrading of pyrolysis bio‐oil

Fermoso

Pizarro

Coronado

et al. 2017

WIREs Energy & Environment

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The present work is a review on the production of bio‐oils from biomass pyrolysis, with special emphasis on the different catalytic methods developed so far for the upgrading of this liquid fraction in order to significantly improve its properties, so it can be used as advanced biofuel. After a discussion of the main variables and factors affecting biomass pyrolysis, a number of processes are described here for bio‐oil upgrading, including catalytic pyrolysis, esterification, aldol condensation, ketonization, and hydrodeoxygenation (HDO). All of them are featured by the use of tailored catalysts that may play different roles, such as completing depolymerization of biomass, promoting deoxygenation reactions, and favoring CC bonds formation in order to increase the proportion of components present in the final bio‐oil within the range of liquid fuels.The review highlights the challenges that must still be faced for biomass pyrolysis/bio‐oil upgrading to become a commercial process. Among them, catalyst deactivation is a general issue to be considered as bio‐oil has a strong tendency to polymerize, forming carbonaceous deposits on the catalysts, and contains a large share of water with acidic pH that may damage the catalyst components in liquid‐phase upgrading treatments. Likewise, process integration of bio‐oil upgrading treatments, through more or less complex schemes, is an aspect that should be deeply analyzed in the future as it may be a key element determining the commercial feasibility of the overall process. WIREs Energy Environ 2017, 6:e245. doi: 10.1002/wene.245 This article is categorized under: Bioenergy > Science and Materials Bioenergy > Systems and Infrastructure

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“…Moreover, in the preparation of minerals, catalysts needs high calcination temperature (approximately above 1100°C), which is time‐ and energy‐consuming. Ni‐based catalysts have been the most preferred catalysts because of its well‐known activity in cleavage of C─C, C─H, and H─O bonds and WGSR, which originated from the high Lewis acidity intensity of nickel metal . Arregi et al studied the influence of different parameters on fast pyrolysis of sawdust in a conical spouted bed (CSBR), followed by in‐line steam reforming in a fluidized bed reactor over a commercial Ni catalyst, acquiring maximum H 2 yield of 117 mg/g biomass .…”

Section: Introductionmentioning

confidence: 99%

“…Ni-based catalysts have been the most preferred catalysts because of its wellknown activity in cleavage of C─C, C─H, and H─O bonds and WGSR, which originated from the high Lewis acidity intensity of nickel metal. [9][10][11] Arregi et al 12 studied the influence of different parameters on fast pyrolysis of sawdust in a conical spouted bed (CSBR), followed by in-line steam reforming in a fluidized bed reactor over a commercial Ni catalyst, acquiring maximum H 2 yield of 117 mg/g biomass . A two-stage screw-kiln reactor was employed by Efika et al 13 for the pyrolysis and steam reforming of waste wood, which obtained H 2 production of 44.4 vol% using NiO/Al 2 O 3 catalyst.…”

Section: Introductionmentioning

confidence: 99%

The influence of preparation method of char supported metallic Ni catalysts on the catalytic performance for reforming of biomass tar

Zhang

2019

Int J Energy Res

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Summary The char‐supported nickel catalysts prepared by wet impregnation and precipitation‐deposition methods under different nickel loadings and catalytic temperatures for catalytic reforming of rice husk tar were investigated. The influences of preparation methods on the physicochemical properties of catalysts and catalytic activity towards tar conversion and gas yield were studied. The results showed that char‐supported metallic Ni catalysts can be directly used without a reduction process because of carbon thermal reaction during calcination. The preparation method had a significant influence on the porosity and Ni dispersion of catalysts. The addition of Ni to char improved the specific surface area from 60 m2 g−1 to 346.8 m2 g−1 because of activation effect of nickel nitrate on char pore structure. The precipitation‐deposition method produced higher surface area, smaller Ni nanoparticulates with more corner and step sites, as well as more concentrated size distribution than those of wet impregnation method, leading to higher catalytic activity, in terms of high tar conversion efficiency (83%) and increasing syngas yield. The selectivity to phenols and naphthalene for precipitation‐deposited catalysts was strengthened, and the relative content of heavy tars was decreased remarkably. The increasing H2 yield and concentration were indicative of efficient conversion of macromolecular organic matters into small molecules gases. In addition, the precipitation‐deposited catalyst exhibited weaker Ni sintering after reaction. The catalytic cracking temperature of 800°C and Ni loading of 10 wt% exhibited the best catalytic effects on gas distribution and tar conversion.

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Influence of impregnated iron and nickel on the pyrolysis of cellulose

Cited by 59 publications

References 50 publications

Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

Catalytic copyrolysis of metal impregnated biomass and plastic with Ni‐based HZSM‐5 catalyst: Synergistic effects, kinetics and product distribution

Advanced biofuels production by upgrading of pyrolysis bio‐oil

The influence of preparation method of char supported metallic Ni catalysts on the catalytic performance for reforming of biomass tar

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