CO-gasification of pelletized wood residues

Non-woody biomass, having lower cellulose content than woody materials, is a common waste material found in agricultural processing plants and fields. Non-woody biomass is often bulky and has a comparatively low energy content. However, non-woody materials sourced from agricultural waste are abundant and cheap. Experimental studies into gasification of non-woody biomass have been conducted by various researchers. This paper reviews feedstock characteristics, pre-treatments, gasification methods, and future direction of this technology. Due to the heterogeneous nature of non-woody biomass, it is critical to apply suitable pre-treatments prior to gasification. Combining non-woody biomass with a small percentage of high grade carbon sourced from biochar or coal into fuel pellets for co-gasification has the potential to improve fuel quality. Synergistic effects of nonwoody biomass-charcoal co-gasification can also reduce tar formation and increase the occurrence of mineral based catalytic reactions. Factors influencing these effects are often complex and require further investigation. 15-20% of fuel pellets energy content may be needed to power the biomass pre-treatment process. The gasification of pelletised non-woody waste provides an attractive alternative fuel source to achieve agricultural energy self-sufficiency and off-grid operation.

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“…The typical calorific value of the syngas produced from biomass is about 4-10 MJ/m 3 with the carbon conversion efficiency circa 50-70% [24,25].…”

Section: Gasificationmentioning

confidence: 99%

Gasification of non-woody biomass: A literature review

Widjaya

Chen

Bowtell

et al. 2018

Renewable and Sustainable Energy Reviews

182

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“…This process, known as cogasification, has been well-studied. 11,13−28 Using co-gasification, the overall thermal efficiency, coal conversion, and volatile formation were enhanced. It has been hypothesized that these effects are due to improvements in heat transfer, mass transfer, and reactivity.…”

Section: Introductionmentioning

confidence: 99%

Pilot-Scale Fluidized-Bed Co-gasification of Palm Kernel Shell with Sub-bituminous Coal

et al. 2015

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Currently, there are many studies that analyze the co-gasification or co-combustion of biomass with coal in fluidized-bed reactors. Mixing these two materials takes advantage of particle segregation as a result of the differences in density, shape, and size; this phenomenon requires due attention because it can lead to reactor operation issues. Some common problems seen with biomass are gap flow, plug flow, and large bubbles that reduce mass and energy transport, thus lowering the quality of the syngas product. In this study, we found that mixing biomass palm kernel shell (PKS) with coal greatly reduces these problems. Furthermore, we propose that this technique can be applied to other biomasses than the biomass used in our study without observing fluid dynamic issues. Continuous feeding co-gasification tests were performed with PKS and sub-bituminous coal type A (sub-bA coal) in a pilot-scale fluidized-bed reactor using air as the gasifying agent.

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“…Depending on the gasifying agent, (air, steam, oxygen, CO2 or steam and oxigen) the average LHV of syngas from biomass is round 16 MJ/m 3 , allowing its usage in a large variety of energetic applications [6]. In comparison with pyrolysis process, the gasification is considered the most efficient environmentally friendly route of biomass conversion into gas-based energy, reaching up to conversion efficiencies higher than 50% [30]. The char produced from the lignocellulosic based material can be used as activated carbon.…”

Section: Methodsmentioning

confidence: 99%

Biomass conversion into valuable products within the integrated management of bio-resources

Ionescu

Bulmau

2019

E3S Web Conf.

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The present research proposes two scenarios for the biomass conversion into valuable products within the integrated management of bio-resources. The scenarios have been developed considering: the biomass availability, material and by-products characteristics and the comprehensive combination of the primary technologies used for the conversion of the biomass mixtures into energy. In scenario 1 the biomass waste valorisation is made via integrated pyrolysis and combustion treatment, while in scenario 2 the biomass conversion in done considering the integration of the pyrolysis, gasification and combustion treatments into the conversion chain. The results revealed that all analysed scenarios purposed are self-independent from the energetic point of view.

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CO-gasification of pelletized wood residues

Cited by 49 publications

References 9 publications

Gasification of non-woody biomass: A literature review

Gasification of non-woody biomass: A literature review

Pilot-Scale Fluidized-Bed Co-gasification of Palm Kernel Shell with Sub-bituminous Coal

Biomass conversion into valuable products within the integrated management of bio-resources

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