Pyrolysis of biomass in a semi-industrial scale reactor: Study of the fuel-nitrogen oxidation during combustion of volatiles

Mura, E.; Debono, O.; Villot, Audrey; Paviet, Frédéric

doi:10.1016/j.biombioe.2013.09.001

Cited by 28 publications

(16 citation statements)

References 22 publications

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“…The extracted gas samples were quantified by NDIR, FID and FTIR method. Mura et al [30] did biomass pyrolysis experiments in a semi-industrial-scale reactor and studied fuel-nitrogen oxidation during combustion of wood-volatiles. They found that the temperature of pyrolysis does not affect the production of fuel nitrogen oxides.…”

Section: Comparable Measurementsmentioning

confidence: 99%

Experimental investigation of the primary combustion zone during staged combustion of wood-chips in a commercial small-scale boiler

Buchmayr

Gruber²,

Hargassner³

et al. 2015

Biomass and Bioenergy

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Section: Comparable Measurementsmentioning

confidence: 99%

Experimental investigation of the primary combustion zone during staged combustion of wood-chips in a commercial small-scale boiler

Buchmayr

Gruber²,

Hargassner³

et al. 2015

Biomass and Bioenergy

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“…of 0.167 m and 2 m in length). Details of the experimental procedure were described elsewhere [39]. Two different pyrolysis chars were produced: (1) c.UWP, only from UWP, and (2) c.FW/CFS, from a mixture of 50 wt% FW and 50 wt% CFS.…”

Section: Pyrolysis Treatmentmentioning

confidence: 99%

H2S removal from syngas using wastes pyrolysis chars

Hervy

Minh

Gérente

et al. 2018

Chemical Engineering Journal

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A B S T R A C TPyrolysis chars from wastes were investigated as sorbents for H 2 S removal from syngas. The H 2 S removal tests were performed at ambient temperature in various dry gas matrices (N 2 , Air, Syngas) to study the effect of the gas composition on the adsorption efficiency. Two chars were produced by the pyrolysis of: used wood pallets (UWP), and a 50/50% mixture of food waste (FW) and coagulation-flocculation sludge (CFS). The chars were functionalized by low-cost processes without chemicals: gas phase oxygenation and steam activation. Activated chars were the most efficient materials due to their large specific surface area, alkaline pH, basic O-containing groups and structural defects in graphene-like sheets. Raman analysis evidenced that inherent mineral species (especially Ca and Fe) increased the H 2 S removal efficiency by promoting the formation of metal sulfide and metal sulphate species at the char surface. Mesopores lower than 70 Å were revealed to be important adsorption sites. Under dry Syngas matrix, the chars remained efficient and selective toward H 2 S removal despite the presence of CO 2 , while O 2 in the Air matrix decreased their removal capacity due to the formation of sulfur acid species. The most efficient material was the steam activated char from FW/CFS, with a removal capacity of 65 mg H2S .g −1 under dry syngas. This char was proved to be completely regenerated with a thermal treatment under N 2 at 750°C. This study demonstrated that activated chars from food waste and sludge could be used as eco-friendly, affordable, and selective materials for syngas desulfurization even under dry atmosphere.

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“…These temperatures were selected as they are representative of low and high conventional pyrolysis temperature, respectively. The details of the experimental procedure were described in a previous paper [45]. The activated char a.c.WUP700 was produced by pyrolysis of char c.WUP700: a sample of 100 g of c.WUP700 was introduced in a semi-rotation reactor in quartz (Carbolite HTR 11/150), and heated to 850°C in an inert atmosphere (nitrogen flow rate = 0.5 L min −1 ) with a heating rate of 10°C min −1 .…”

Section: Char Preparation and Basic Characterizationmentioning

confidence: 99%

Advanced characterization unravels the structure and reactivity of wood-based chars

Berhanu

Hervy

Weiss-Hortala

et al. 2018

Journal of Analytical and Applied Pyrolysis

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This study aims at understanding the structural changes occurring in the carbonaceous matrix of wood-based chars during their thermal conversion. Although chars are routinely characterized by porosity measurements or scanning electron microscopy, the composition and structure of the carbonaceous matrix is often not investigated. Here, advanced characterization using X-ray synchrotron microtomography, transmission electron microscopy, Raman spectroscopy and X-ray diffraction provided a precise description of the char properties, allowing for an accurate discussion of their catalytic properties. Two chars were produced by slow pyrolysis of wood waste (400 and 700°C) and a third one was fabricated by activation under steam at 850°C of the char obtained at 700°C. The results show that the pyrolysis temperature and the activation performed did not affect the macrostructure of the chars and that the pores were interconnected at the macroscopic scale. However, at 700°C, the micro-and nanostructures were modified: short-range organized graphene fringes were observed. The activated char showed a homogeneous microstructure similar to that of its precursor. Besides, the ratio of graphene-like structures, the local organization of graphene sheets, and the imperfections in graphene-like sheets were clearly improved by the post-treatment. To our knowledge, this is the first time that such an approach, combining various tools, is applied for the study of pyrolysis chars.

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Pyrolysis of biomass in a semi-industrial scale reactor: Study of the fuel-nitrogen oxidation during combustion of volatiles

Cited by 28 publications

References 22 publications

Experimental investigation of the primary combustion zone during staged combustion of wood-chips in a commercial small-scale boiler

Experimental investigation of the primary combustion zone during staged combustion of wood-chips in a commercial small-scale boiler

H2S removal from syngas using wastes pyrolysis chars

Advanced characterization unravels the structure and reactivity of wood-based chars

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