Development of a Novel Vacuum Pyrolysis Reactor with Improved Heat Transfer Potential

Roy, Christian; Yang, Jingzhen; Blanchette, Daniel; Korving, Leon; Caumia, B. De

doi:10.1007/978-94-009-1559-6_28

Cited by 32 publications

(20 citation statements)

References 8 publications

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“…Pyrovac in Québec, Canada has developed a vacuum pyrolysis process for converting biomass to liquids [14]. While this is a slow pyrolysis process (lower heat transfer rate) it generates a chemically similar liquid product because the shorter vapor residence time reduces secondary reactions.…”

Section: Vacuum Pyrolysismentioning

confidence: 99%

See 1 more Smart Citation

Large-Scale Pyrolysis Oil Production: A Technology Assessment and Economic Analysis

Ringer¹,

Putsche²,

Scahill³

2006

241

235

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Executive SummaryPyrolysis is one of a number of possible paths for converting biomass to higher value products. As such, this technology can play a role in a biorefinery model to expand the suite of product options available from biomass. The intent of this report is to provide the reader with a broad perspective of pyrolysis technology as it relates to converting biomass substrates to a liquid "bio oil" product, and a detailed technical and economic assessment of a fast pyrolysis plant producing 16 tonne/day of bio-oil.The international research community has developed a considerable body of knowledge on the topic over the last twenty-five years. The first part of this report attempts to synthesize much of this information into the relevant issues that are important to advancing pyrolysis technology to commercialization. The most relevant topics fall under the following categories: 1) Technical requirements for converting biomass to high yields of liquid bio-oil 2) Reactor designs capable of meeting technical requirements 3) Bio-oil stability issues and recent findings that address the problem 4) Product specifications and standards that need to be established 5) Applications for using bio-oil in existing or modified end use devices 6) Environmental, safety, and health issues For the bio-oil plant technical and economic analysis, the process is based on fast pyrolysis, which is composed of five major processing areas: feed handling and drying, pyrolysis, char combustion, product recovery, and steam generation. An ASPEN model was developed to simulate the operation of the bio-oil production plant. Based on a 550 tonne/day biomass (wood chips, 50% by mass water content) feed, the cost of the bio-oil for a fully equity financed plant and 10% internal rate of return is $7.62/GJ on a lower heating value (LHV) basis.

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Section: Vacuum Pyrolysismentioning

confidence: 99%

“…While not quite as efficient in capturing aerosols as the spray scrubber, the staged system [14] had the advantage of collecting the liquids as fractions or "thermal cuts". This may have some advantages if one is seeking to extract certain compounds from the whole oil such as in a bio-refinery application.…”

Section: Pyrolysis Vapor (Bio-oil) Recoverymentioning

confidence: 99%

Large-Scale Pyrolysis Oil Production: A Technology Assessment and Economic Analysis

Ringer¹,

Putsche²,

Scahill³

2006

241

235

View full text Add to dashboard Cite

show abstract

“…On the belt, biomasses are periodically stirred by a mechanical agitator. A burner and an induction heater are used with molten salts as a heat carrier to heat the biomass [80]. Because of operating in a vacuum, these types of pyrolysis reactors require special solids feeding and discharging devices to maintain a good seal at all times.…”

Section: Vacuum Pyrolysis Reactormentioning

confidence: 99%

Biofuels Production through Biomass Pyrolysis —A Technological Review

et al. 2012

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There has been an enormous amount of research in recent years in the area of thermo-chemical conversion of biomass into bio-fuels (bio-oil, bio-char and bio-gas) through pyrolysis technology due to its several socio-economic advantages as well as the fact it is an efficient conversion method compared to other thermo-chemical conversion technologies. However, this technology is not yet fully developed with respect to its commercial applications. In this study, more than two hundred publications are reviewed, discussed and summarized, with the emphasis being placed on the current status of pyrolysis technology and its potential for commercial applications for bio-fuel production. Aspects of pyrolysis technology such as pyrolysis principles, biomass sources and characteristics, types of pyrolysis, pyrolysis reactor design, pyrolysis products and their characteristics and economics of bio-fuel production are presented. It is found from this study that conversion of biomass to bio-fuel has to overcome challenges such as understanding the trade-off between the size of the pyrolysis plant and feedstock, improvement of the reliability of pyrolysis reactors and processes to become viable for commercial applications. Further study is required to achieve a better understanding of the economics of biomass pyrolysis for bio-fuel production, as well as resolving issues related to the capabilities of this technology in practical application. OPEN ACCESSEnergies 2012, 5 4953

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“…In case of fluidized bed pyrolysis, extensive particle entrainment with the vapours has been reported. Vacuum pyrolyser-the low turbulence inside moving and stirred-bed pyrolysis reactors developed by Pyrovac [4,5] has been reported to have reduced carryover of particles in condensable products. The vacuum pyrolysis provides the required low vapour residence time with a slight compromise in the heating rate achievable and thereby the reduction in liquid products.…”

Section: Introductionmentioning

confidence: 99%

05/01165 Influence of pretreatment for deashing of sugarcane bagasse on pyrolysis products

2005

Fuel and Energy Abstracts

158

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This paper reports the studies made on the vacuum pyrolysis of deashed sugarcane bagasse, on the pyrolysis products. The present work is with an objective to understand the change in the quantity and quality of the oil fraction obtained from pyrolysis, upon pretreatment for deashing of original biomass. Ash, in the entrained char is believed to be catalyzing the polymerization reaction in the oils and thereby increases the viscosity. Three different pre-treatment processes used for deashing are water leaching, mild acid treatment with HCl and mild acid treatment with HF.1 The study indicates the remarkable influence of pretreatment process for deashing, by enhancing the total energy distribution in oil fraction of the pyrolysis products. This is attributed to selective removal of ash elements along with removal of extractives and hemicellulose in different proportions. However, it was found that the pre-treatments do not improve the stability of oil. The water leachate, as expected, showed potential of making ethanol via fermentation.

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Development of a Novel Vacuum Pyrolysis Reactor with Improved Heat Transfer Potential

Cited by 32 publications

References 8 publications

Large-Scale Pyrolysis Oil Production: A Technology Assessment and Economic Analysis

Large-Scale Pyrolysis Oil Production: A Technology Assessment and Economic Analysis

Biofuels Production through Biomass Pyrolysis —A Technological Review

05/01165 Influence of pretreatment for deashing of sugarcane bagasse on pyrolysis products

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