Biomass Gasification and Pyrolysis

Roddy, Dermot; Manson-Whitton, Chris

doi:10.1016/b978-0-08-087872-0.00514-x

Cited by 34 publications

(27 citation statements)

References 14 publications

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“…At the current state of gasifier technology development, this tends to imply entrained flow gasifiers or possibly circulating fluidized bed gasifiers depending on the number of gasification units desired as part of a cost-versus-reliability optimization [10]. The entrained flow gasifier offers economies of scale because it can run at feed rates of up to 10 000 oven-dry tonnes per day, but it requires a highly processed feedstock to compensate for the very short residence time in the gasification reactor-a matter of seconds.…”

Section: Thermochemical Routes To Converting Biomass 41 Gasificationmentioning

confidence: 99%

“…A variety of gasification technologies is available across a range of sizes, from small updraft and downdraft gasifiers through a range of fluidized bed gasifiers at an intermediate scale and on to larger entrained flow and plasma gasifiers [10,13]. (In an updraft gasifier, the oxidant is blown up through the fixed gasifier bed with the syngas exiting at the top; in a downdraft gasifier, the oxidant is blown down through the reactor with the syngas exiting at the bottom.)…”

Section: Thermochemical Routes To Converting Biomass 41 Gasificationmentioning

confidence: 99%

“…The entrained flow gasifier offers economies of scale because it can run at feed rates of up to 10 000 oven-dry tonnes per day, but it requires a highly processed feedstock to compensate for the very short residence time in the gasification reactor-a matter of seconds. One option is to grind the biomass to achieve a particle size of less than 1 mm, which, for a fibrous-vegetable-based feedstock, may require an upstream torrefaction step to make it rsfs.royalsocietypublishing.org Interface Focus 3: 20120038 grindable [10]. (Torrefaction is a heat-treatment process carried out in the absence of added oxygen at temperatures around 2508C, converting biomass into a charcoal-like material which retains 90% of its original energy content.…”

Section: Thermochemical Routes To Converting Biomass 41 Gasificationmentioning

confidence: 99%

“…Thermochemical conversion routes are based on biomass gasification [10][11][12]. Gasification is a partial combustion process in which biomass reacts at a high temperature with oxygen, which is supplied at levels insufficient to support full combustion.…”

Section: Thermochemical Routes To Converting Biomass 41 Gasificationmentioning

confidence: 99%

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Biomass in a petrochemical world

Roddy

2013

Interface Focus.

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The world's increasingly voracious appetite for fossil fuels is driven by fast-growing populations and ever-rising aspirations for the lifestyles and standard of living exemplified in the developed world. Forecasts for higher electricity consumption, more comfortable living environments (via heating or cooling) and greater demand for transport fuels are well known. Similar growth in demand is projected for petrochemical-based products in the form of man-made fibres for clothing, ubiquitous plastic artefacts, cosmetics, etc. All drawing upon the same finite oil, gas and coal feedstocks. Biomass can, in principle, substitute for all of these feedstocks. Although ultimately finite, biomass resources can be expanded and renewed if this is a societal priority. This paper examines the projected growth of an energy-intensive international petrochemicals industry, considers its demand for both utilities and feedstocks, and considers the extent to which biomass can substitute for fossil fuels. The scope of this study includes biomass component extraction, direct chemical conversion, thermochemical conversion and biochemical conversion. Noting that the petrochemicals industry consumes around 10 per cent of the world's fossil fuels as feedstocks and almost as much again in utilities, various strategies for addressing future demand are considered. The need for long-term infrastructure and logistics planning is highlighted.

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Section: Thermochemical Routes To Converting Biomass 41 Gasificationmentioning

confidence: 99%

Section: Thermochemical Routes To Converting Biomass 41 Gasificationmentioning

confidence: 99%

Section: Thermochemical Routes To Converting Biomass 41 Gasificationmentioning

confidence: 99%

Section: Thermochemical Routes To Converting Biomass 41 Gasificationmentioning

confidence: 99%

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Biomass in a petrochemical world

Roddy

2013

Interface Focus.

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“…Gasification is a thermochemical approach, in which biomass is simply used to produce synthesis gas (syngas) through partial combustion 10) . To produce syngas, biomass is first reduced to carbon (char) by pyrolysis, followed by alternating blasts of steam and air.…”

Section: Thermochemical Approachmentioning

confidence: 99%