Pyrolysis of two agricultural residues: Olive and grape bagasse. Influence of particle size and temperature

Martín, Juan Vicente González; Beltrán, Fernando J.; Bernalte, A.; Ramiro, A.; González, J.F.

doi:10.1016/s0961-9534(96)00029-3

Cited by 178 publications

(118 citation statements)

References 11 publications

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“…It was found that particle size had no influence on the pyrolysis product parameters. These results are in agreement with findings reported in the literature for grape and olive bagasse [30] and for C. Cardunculus L. [31].…”

Section: Discussion On Process Optimizationsupporting

confidence: 94%

Pyrolysis of Municipal Green Waste: A Modelling, Simulation and Experimental Analysis

2015

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Abstract:Pyrolysis is the thermo-chemical conversion of carbonaceous feedstock in the absence of oxygen to produce bio-fuel (bio-oil, bio-char and syn-gas). Bio-fuel production from municipal green waste (MGW) through the pyrolysis process has attracted considerable attention recently in the renewable energy sector because it can reduce greenhouse gas emissions and contribute to energy security. This study analyses properties of MGW feedstock available in Rockhampton city of Central Queensland, Australia, and presents an experimental investigation of producing bio-fuel from that MGW through the pyrolysis process using a short sealed rotary furnace. It was found from the experiment that about 19.97% bio-oil, 40.83% bio-char and 29.77% syn-gas can be produced from the MGW. Then, a four-stage steady state simulation model is developed for pyrolysis process performance simulation using Aspen Plus software. In the first stage, the moisture content of the MGW feed is reduced. In the second stage, the MGW is decomposed according to its elemental constituents. In the third stage, condensate material is separated and, finally, the pyrolysis reactions are modelled using the Gibbs free energy minimisation approach. The MGW's ultimate and proximate analysis data were used in the Aspen Plus simulation as input parameters. The model is validated with experimentally measured data. A good OPEN ACCESSEnergies 2015, 8 7523 agreement between simulation and experimental results was found. More specifically, the variation of modelling and experimental elemental compositions of the MGW was found to be 7.3% for carbon, 15.82% for hydrogen, 7.04% for nitrogen and 5.56% for sulphur. The validated model is used to optimise the biofuel production from the MGW as a function of operating variables such as temperature, moisture content, particle size and process heat air-fuel ratio. The modelling and optimisation results are presented, analysed and discussed.

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Section: Discussion On Process Optimizationsupporting

confidence: 94%

Pyrolysis of Municipal Green Waste: A Modelling, Simulation and Experimental Analysis

2015

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“…For the torrefaction process, gas generation is considered to be a group of independent first reactions and every gas has its own activation energy. Encinar [15] have described this in detail. We used a similar formula and eq.…”

Section: Generation Law For Gas Productsmentioning

confidence: 99%

Pretreatment of biomass by torrefaction

et al. 2011

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Agricultural biomass has some drawbacks such as high moisture content, low energy density and wide distribution and as a result, the cost of transport and storage are high. Moreover, raw biomass has poor grindability so its use in a pulverized boiler or entrained flow gasifier is difficult. Torrefaction is a mild pyrolysis process carried out at temperatures ranging from 200°C to 300°C to deal with these problems. The cotton stalk and wheat straw were torrefied in a fix-bed reactor at moderate temperatures (200°C, 230°C, 250°C, 270°C and 300°C) under N 2 for 30 min. The biomass chars after torrefaction had higher energy density and improved grindability characteristics compared with raw biomass and they also showed hydrophobic characteristics. The volatiles consist of a condensable fraction and a non-condensable fraction. The former mainly contained water and tar (organic products but mainly acetic acid). The non-condensable products are typically comprised of CO 2 , CO and a small amount of CH 4 and even trace H 2 . The volatiles increased with an increase in the torrefaction temperature but the solid yield and the energy yield decreased. However, the grindability and energy density of the biomass char showed great improvement. A kinetic study on the generation of the main non-condensable gases was undertaken and we conclude that the gases are formed by parallel independent first-order reactions. Characteristic kinetic parameters for the generation of each gas were determined.

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“…The overlap of the distribution curves for phenol-2,6-dimethoxy, phenol-2-methoxy-4-methyl and furfural, shows that their concentrations increase with temperature, reach a maximum value and then decrease. This behavior could be due to the cracking of the liquid phase with increasing temperature [9].…”

Section: Pyrolysis and Combustion In The Bis Furnacementioning

confidence: 99%

Thermolysis Product Distribution of Solid Waste Obtained From Olive Oil Production

Mehmetli¹,

Dogan

Tiris

et al. 2008

CLEAN Soil Air Water

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Pyrolysis and direct combustion processes were applied to pomace obtained from olive oil production in Bayer/ICI/Shell (BIS) and Verbant der Chemische Industrie (VCI) furnaces. The volatile and semi-volatile products derived from both processes taking place in each furnace were captured on XAD resins at selected temperature and nonvolatiles were obtained after extraction of the resins with acetone. The qualitative and quantitative determinations were carried out by using a gas chromatograph coupled with mass spectrometry. It was found that the compound distribution at different temperatures in the combustion process were wider than for the pyrolysis in the BIS furnace. The compounds obtained at lower temperatures during pyrolysis and combustion in the VCI furnace showed similarities, although a larger number of compounds were obtained at 8008C in the combustion process than in the pyrolysis process.

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Pyrolysis of two agricultural residues: Olive and grape bagasse. Influence of particle size and temperature

Cited by 178 publications

References 11 publications

Pyrolysis of Municipal Green Waste: A Modelling, Simulation and Experimental Analysis

Pyrolysis of Municipal Green Waste: A Modelling, Simulation and Experimental Analysis

Pretreatment of biomass by torrefaction

Thermolysis Product Distribution of Solid Waste Obtained From Olive Oil Production

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