Woody biomass and RPF gasification using reforming catalyst and calcium oxide

Kobayashi, Jun; Kawamoto, Katsuya; Fukushima, Ryutaro; Tanaka, Shingo

doi:10.1016/j.chemosphere.2011.03.010

Cited by 24 publications

(10 citation statements)

References 27 publications

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“…On the other hand, wood samples R1 and R2, paper/card R3 and composite R5 showed higher O/C ratios (>0.9) that decreased their Mixture R6 seems to escape to this rule, possibly because problems of homogenization of its constituents occurred during the determination of ultimate analysis and which were associated to the difficulty of obtaining fine grains. The corresponding O/C ratio (1.03) did not agree well with the literature (0.7 [7]). Contents of S were relatively low for the generality of wastes ( 0.4 wt% db) and therefore formation of toxic compounds SO 2 and H 2 S during gasification would be negligible.…”

Section: Resultscontrasting

confidence: 54%

Characterization of Municipal, Construction and Demolition Wastes for Energy Production Through Gasification - A Case Study for a Portuguese Waste Management Company

Alves

Passos

Brito

et al. 2018

Lecture Notes in Electrical Engineering

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Gasification of wastes is considered a promising alternative for energy generation due to its lower environmental impacts when compared with conventional landfilling and incineration. Valorisation of such wastes improves sustainability of resource management and of energy production. However, an appropriate characterisation of wastes in terms of physical and chemical properties is essential for the prediction of their behaviour during gasification, allowing to identify possible problems for the environment and installed equipment and also to define which materials present a greater energy potential. This study aimed to characterise 10 different fractions from municipal, construction and demolition wastes received in different fluxes by a Portuguese waste management company. These fractions included wood (44.83 wt%), plastic (22.15 wt%), paper/card (0.04 wt%), mixtures of paper and plastic (14.67 wt%) and sewage sludge (18.31 wt%). For this purpose, determination of density, proximate and ultimate analysis, higher heating value (HHV), thermogravimetric profiles and inorganic composition of ashes were performed for each fraction. Analysis revealed that plastics and their mixtures with paper/card possess the highest HHV's (25-45 MJ/kg db), thus exhibiting a greater capacity for energy production. High levels of ashes found in dried sewage sludge (50 wt % db) indicate that a lot of by-product will be generated after gasification, possibly increasing the treatment costs. A gasification unit operating at 50 kg/h and admitting a mixture of all these wastes would generate 109.7 kW of total power, having capacity to receive more waste fluxes along the year.

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Section: Resultscontrasting

confidence: 54%

Characterization of Municipal, Construction and Demolition Wastes for Energy Production Through Gasification - A Case Study for a Portuguese Waste Management Company

Alves

Passos

Brito

et al. 2018

Lecture Notes in Electrical Engineering

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“…CaO also shows excellence capability as catalyst when it proved to be effective in decreasing tar concentration in the case of woody biomass gasification . Nanosized CaO also can enhance the production of hydrogen compared to the bulk of CaO for gasification of biomass to produce hydrogen and consequently reduce the production of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Hydrogen production from wood gasification promoted by waste eggshell catalyst

Taufiq‐Yap

Wong

Marliza

et al. 2013

Int. J. Energy Res.

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SUMMARYBio-hydrogen renowned as a future potential hydrogen source and studies were devoted in developing the efficient way to obtain the hydrogen. Biomass gasification of Azadirachta excelsa wood was carried out with addition of naturally derived CaO catalyst using temperature-programmed gasification (TPG) technique. The reaction (TPG) was performed at 50-1000 C in 5% O 2 /He with flow rate 10 ml/min, and the product gas evolution (H 2 , CH 4 , CO and CO 2 ) was detected by online mass spectrometer. The waste eggshell was chosen as a natural source of CaO, and the effect of catalyst loading was investigated in this study. All the fresh and used catalysts were characterized, and the physicochemical changes of the eggshell were observed through scanning electron microscopy, X-ray fluorescence and X-ray diffraction techniques. Hydrogen yield were increased along with the catalyst loading (20%, 40% and 60%) from 57 to 73%, respectively, compared to the reaction without catalyst. The additions of waste eggshell enhanced the catalytic activity and suppressed CO 2 production through CaO absorption property which induced the water gas shift reaction that promotes H 2 production at lower temperature.

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“…Steam itself or steam with O 2 as a gasifying agent seem to produce higher amounts of H 2 compared to air or O 2 , which means higher H 2 /CO ratios [15,17]. High-lignin biomass gasification tends to produce more H 2 [17,23] compared to biomass with a low lignin content [12,16]. Nevertheless, using air or O 2 as a gasifying agent, the H 2 /CO ratio decreases significantly [15,21].…”

Section: Challenges and Opportunities For Syngas Fermentationmentioning

confidence: 99%

“…The influence of feedstock composition and gasifying agent on syngas composition can be clearly observed in Table 1. Steam itself or steam with O 2 as a gasifying agent seem to produce higher amounts of H 2 compared to air or O 2 , which means higher H 2 /CO ratios [15,17]. High-lignin biomass gasification tends to produce more H 2 [17,23] compared to biomass with a low lignin content [12,16].…”

Section: Challenges and Opportunities For Syngas Fermentationmentioning

confidence: 99%

Impacts of Syngas Composition on Anaerobic Fermentation

et al. 2021

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Energy consumption places growing demands on modern lifestyles, which have direct impacts on the world’s natural environment. To attain the levels of sustainability required to avoid further consequences of changes in the climate, alternatives for sustainable production not only of energy but also materials and chemicals must be pursued. In this respect, syngas fermentation has recently attracted much attention, particularly from industries responsible for high levels of greenhouse gas emissions. Syngas can be obtained by thermochemical conversion of biomass, animal waste, coal, municipal solid wastes and other carbonaceous materials, and its composition depends on biomass properties and gasification conditions. It is defined as a gaseous mixture of CO and H2 but, depending on those parameters, it can also contain CO2, CH4 and secondary components, such as tar, oxygen and nitrogenous compounds. Even so, raw syngas can be used by anaerobic bacteria to produce biofuels (ethanol, butanol, etc.) and biochemicals (acetic acid, butyric acid, etc.). This review updates recent work on the influence of biomass properties and gasification parameters on syngas composition and details the influence of these secondary components and CO/H2 molar ratio on microbial metabolism and product formation. Moreover, the main challenges, opportunities and current developments in syngas fermentation are highlighted in this review.

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Woody biomass and RPF gasification using reforming catalyst and calcium oxide

Cited by 24 publications

References 27 publications

Characterization of Municipal, Construction and Demolition Wastes for Energy Production Through Gasification - A Case Study for a Portuguese Waste Management Company

Characterization of Municipal, Construction and Demolition Wastes for Energy Production Through Gasification - A Case Study for a Portuguese Waste Management Company

Hydrogen production from wood gasification promoted by waste eggshell catalyst

Impacts of Syngas Composition on Anaerobic Fermentation

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