Effect of composting on the production of syngas during pyrolysis of perennial grasses

Juchelková, Dagmar; Corsaro, Agnieszka; Hlavsová, Adéla; Raclavská, Helena

doi:10.1016/j.fuel.2015.03.061

Cited by 27 publications

(10 citation statements)

References 57 publications

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“…According to the liquid and char characteristic, this major formation of CO may have involved decarbonylation reactions and their reactions with volatiles and chars formed at lower temperatures. In reference to other research, ,− the observed formation of CO at other temperature ranges may involve the glycosidic cleavage of hemicellulose (250 to 350 °C), unsaturated bond formation (350 to 450 °C), and de-ether reactions involving fusing rings (750 to 950 °C). The formation of CH 4 could also be divided into two stages.…”

Section: Resultsmentioning

confidence: 64%

Biomass-Based Pyrolytic Polygeneration System for Bamboo Industry Waste: Evolution of the Char Structure and the Pyrolysis Mechanism

Huan²,

et al. 2016

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Biomass-based pyrolytic polygeneration system can commercialize all products (liquids, gases, and solids) generated during pyrolysis, while fast pyrolysis, gasification and carbonization, can only singly commercialize liquids, gases, and solids, respectively. To determine the optimum operational parameters for biomass pyrolytic polygeneration while using bamboo waste as the feedstock, the product characteristics were investigated over a temperature range of 250 to 950 °C. Meanwhile, details of the evolution of the char structure were analyzed to reveal the pyrolysis mechanism. Results showed that to increase the yield of char, the operational temperature should be at 350 °C; however, at this temperature, no inner pores were formed and a low quality char product was produced. Thus, the optimum operating temperature recommended for biomass pyrolytic polygeneration of bamboo waste was set to 550 °C. At the optimum temperature, the surface area of the char was 200 m2/g, the calorific value of gas was 14 MJ/m3, and the concentration of phenols in liquid reached the maximum level. A pyrolysis mechanism based on the evolution of the char structure was proposed. First, the ordered organic macrostructure in raw biomass was converted to a network-like structure consisting of a “3D network of benzene rings” during the “initial decomposition stage (<450°C)”, and this was followed by the “first reconstruction stage (450–550°C)” whereby the initial 3D network was converted to a “2D structure of fused rings”. Subsequently, with further increases in temperature, a “graphite microcrystalline structure” was formed during the “second condensation stage (>550°C)”. The results of this study are expected to be beneficial for the comprehensive utilization of bamboo waste and provide new insight into the pyrolysis mechanism.

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Section: Resultsmentioning

confidence: 64%

Biomass-Based Pyrolytic Polygeneration System for Bamboo Industry Waste: Evolution of the Char Structure and the Pyrolysis Mechanism

Huan²,

et al. 2016

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“…As mentioned previously, green waste contains more ash. Juchelkovàet al 26 reported that the ash content can be associated with the increase in pyrolysis gas production. The alkali (K) and alkaline-earth metals such as Ca and Mg may catalyze the thermal degradation of biomass.…”

Section: Resultsmentioning

confidence: 99%

Green Waste/Wood Pellet Pyrolysis in a Pilot-Scale Rotary Kiln: Effect of Temperature on Product Distribution and Characteristics

et al. 2020

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In this study, a pilot-scale rotary kiln was used to perform the pyrolysis of garden green waste. The results are compared to wood pellets (a mixture of oak and beech sawdust). Both samples have similar organic composition and energy content except for ash content which is around three times higher in the case of green waste. Pyrolysis tests were performed at different temperatures ranging from 700 to 900°C. The study of the products yields as a function of temperature showed that above 700°C, volatile matter (gas and bio-oil) yields were higher than 80 wt.% and syngas (CO+H 2) concentration was higher than 59 mol.%. On the other hand, the char yield was below 20 wt. % with an HHV of 29 MJ/kg and an 80% carbon content. Tar quantitative gas chromatography/mass spectrometry (GC/MS) analysis showed the predominance of benzene and naphthalene. Hence, this work revealed and validated the relevance of green waste thermochemical conversion for syngas production. In addition, this investigation can support the optimization of operating parameters and energy efficiency of a two-staged gasification process where pyrolysis is a decisive initial step.

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“…If this waste is not managed well, it will become a problem to the environment. Composting has been reported as a potential method for recycling paper and grass clippings (Ball et al 2000;Francou et al 2008;Juchelkova et al 2015;Elouaqoudi et al 2015). However, to the best of our knowledge, there is no published study on the composting of AnPOME mixed with paper and grass clippings, although these may offer complementary constituents e.g., in terms of nutrients and moisture content.…”

Section: Introductionmentioning

confidence: 99%

Composting paper and grass clippings with anaerobically treated palm oil mill effluent

Zahrim

Leong

Ayisah

et al. 2016

Int J Recycl Org Waste Agricult

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The purpose of this study is to investigate the composting performance of anaerobically treated palm oil mill effluent (AnPOME) mixed with paper and grass clippings. Methods Composting was conducted using a laboratory scale system for 40 days. Several parameters were determined: temperature, mass reduction, pH, electrical conductivity, colour, zeta potential, phytotoxicity and final compost nutrients. Results The moisture content and compost mass were reduced by 24 and 18 %, respectively. Both final compost pH value and electrical conductivity were found to increase in value. Colour (measured as PtCo) was not suitable as a maturity indicator. The negative zeta potential values decreased from-12.25 to-21.80 mV. The phytotoxicity of the compost mixture was found to decrease in value during the process and the final nutrient value of the compost indicates its suitability as a soil conditioner. Conclusions From this study, we conclude that the addition of paper and grass clippings can be a potential substrate to be composted with anaerobically treated palm oil mill effluent (AnPOME). The final compost produced is suitable for soil conditioner.

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Effect of composting on the production of syngas during pyrolysis of perennial grasses

Cited by 27 publications

References 57 publications

Biomass-Based Pyrolytic Polygeneration System for Bamboo Industry Waste: Evolution of the Char Structure and the Pyrolysis Mechanism

Biomass-Based Pyrolytic Polygeneration System for Bamboo Industry Waste: Evolution of the Char Structure and the Pyrolysis Mechanism

Green Waste/Wood Pellet Pyrolysis in a Pilot-Scale Rotary Kiln: Effect of Temperature on Product Distribution and Characteristics

Composting paper and grass clippings with anaerobically treated palm oil mill effluent

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