Modelling of a downdraft gasifier fed by agricultural residues

Antonopoulos, Ioannis; Karagiannidis, A.; Gkouletsos, A.; Perkoulidis, G.

doi:10.1016/j.wasman.2011.12.015

Cited by 80 publications

(34 citation statements)

References 28 publications

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“…It could be observed that the mole fraction of H 2 increased while that of CO decreased with moisture content varying from 5% to 20% wet basis. However, with the same variation in moisture content, the increase in the mole fraction of CO was found to be more pronounced as compared to that in the mole fraction of H 2 with the same variation interval in moisture content [40]. As expected, mole fraction of CO 2 also increased with moisture content from 5% to 20% wet basis.…”

Section: Effect Of Wood Moisture Contentssupporting

confidence: 63%

Biomass gasification with CO2 in a fluidized bed

2016

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Section: Effect Of Wood Moisture Contentssupporting

confidence: 63%

Biomass gasification with CO2 in a fluidized bed

2016

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“…As the syngas was obtained by externally heating the reactor these values are largely superior to the ones that could be obtained under real industrial conditions. In that case a quota of the feedstock is partially oxidized to ensure the gasification endothermic conditions (Antonopoulos et al, 2012). This oxidized quantity depends on feed-stock elemental composition, humidity, gasification temperature and it is determined based on the energy balance of the gasification process.…”

Section: Gasification Processmentioning

confidence: 99%

Analysis of biomass and waste gasification lean syngases combustion for power generation using spark ignition engines

2016

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“…Up to date, few tests and analysis have been carried out in order to verify the suitability of cardoon in pyrolysis, gasification, and combustion [32][33][34][35][36][37][38][39][40][41][42][43][44][45]. Up to date, few tests and analysis have been carried out in order to verify the suitability of cardoon in pyrolysis, gasification, and combustion [32][33][34][35][36][37][38][39][40][41][42][43][44][45].…”

Section: Feedstock For Thermochemical Processesmentioning

confidence: 99%

“…Cardoon-fired test runs in lab-scale and pilot-scale have been performed in the past [33,34,43]. Cardoon-fired test runs in lab-scale and pilot-scale have been performed in the past [33,34,43].…”

Section: Feedstock For Thermochemical Processesmentioning

confidence: 99%

Agglomeration problems during cardoon fluidized bed gasification

et al. 2014

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Cynara Cardunculus, commonly known as cardoon is a potential energy crop native to the Mediterranean region with high production yields reported. The aim of this work is to present an overview on the contradicting agronomic data available for cardoon and its potential exploitation in industrial thermochemical (i. e. combustion and gasification) applications. Moreover, experimental work on cardoon gasification is presented, focusing on the agglomeration problems it causes when using it in fluidized bed gasifiers. Cardoon cultivated in Greece was gasified in a100 kW thermal atmospheric circulating fluidized bed gasifier. Due to high ash content (rich in potassium) defluidization was observed at low temperatures (780°C ) during the first 30 minutes after the fuel feeding begun.The agglomerates are investigated with SEM/EDS in an effort to determine the gluing mechanism. The particular cardoon was rich in calcium, and this was apparent in the rich in silicates re-solidified melt.This has led into a recent rush of changing plantations to this plant for the production of biomass in Mediterranean regions. Nevertheless, there is very little positive evidence from applications of this fuel that it is trouble free.Cardoon is a perennial herbaceous species native to the Mediterranean region climate which is characterized by dry and hot summer conditions. The factors that influence the properties of cardoon are the chemical soil characteristics, the fertilizers, the harvesting method, and the different climatic condition and rain distribution. One of the major advantages of cardoon crops is the reduced irrigation demands, thus its cultivation costs are lower, compared to other crops [3][4][5][6][7].The plant has an annual development cycle, native to the Mediterranean region, mainly localized in Spain, Italy, and Greece (typical conditions are mild winters, hot dry summers, and low irregularly distributed annual rainfalls). Cardoon can survive the summer drought by growing a very deep rooting (up to 7 meters) and drying the aboveground plant part during the summer [8][9][10][11][12]. The height of plant can reach up to 2 m depending on climate and soil conditions. The reproductive cycle is completed during the summer so the harvest period can start in August when the ground part is dried. As a result, the crop leads to a high yield of dried solid biomass [13][14][15][16][17].Because of all the above qualities, Cardoon can also have a very negative effect in a local agricultural system, especially when farmers decide to change the cultivated crop. Cardoon has long been recognized as a horrific pest plant can also become a serious invasive species [18]. This is mainly because of its perennial tap-root, capable of vigorously regenerating unless the entire root system is destroyed. This task is very difficult or impossible even if plowing, chaining, scraping, and bulldozing are employed [19].Farmers should take into account the abovementioned character of Cardoon before deciding to engage its cultivation due to benefits of its h...

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Modelling of a downdraft gasifier fed by agricultural residues

Cited by 80 publications

References 28 publications

Biomass gasification with CO2 in a fluidized bed

Biomass gasification with CO2 in a fluidized bed

Analysis of biomass and waste gasification lean syngases combustion for power generation using spark ignition engines

Agglomeration problems during cardoon fluidized bed gasification

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