Effect of feedstock composition on product yields and energy recovery rates of fast pyrolysis products from different straw types

Tröger, N.; Richter, Daniel deB.; Stahl, R.

doi:10.1016/j.jaap.2012.12.012

Cited by 89 publications

(49 citation statements)

References 23 publications

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“…In this study, organic oil yields increase (35 -46 -50% by weight) with decreasing ash contents (9.2 -2.7 -1.5% by weight) of the feedstocks wheat straw -miscanthus -scrap wood (see Table 1). This is in line with observations from other studies 10,15,16 . Yields of water of reaction are in a comparatively narrow range from 12-14% by weight.…”

Section: Representative Resultssupporting

confidence: 94%

“…It uses steel balls as the heat carrier, which is recirculated internally with a bucket elevator and re-heated with an electrical heating system. Its main purpose was the investigation of a unique product recovery technology that was adapted to the use of the product in a gasifier and the validation of its suitability for a broad range of feedstocks [9][10][11] . A larger pilot plant was built in parallel to these studies with a biomass input capacity of 500 kg hr -1 , which has been operational for five years.…”

Section: Introductionmentioning

confidence: 99%

“…Ash is known to significantly influence the product distribution of fast pyrolysis. It leads to a decrease of organic condensate (OC) and an increase in both solid and gaseous products 10,15,16 . These facts are accounted for both in the design of the experimental setup presented here and the overall process chain.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor

Funke

Richter

Niebel

et al. 2016

JoVE

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Fast pyrolysis is being increasingly applied in commercial plants worldwide. They run exclusively on woody biomass, which has favorable properties for conversion with fast pyrolysis. In order to increase the synergies of food production and the energetic and/or material use of biomass, it is desirable to utilize residues from agricultural production, e.g., straw. The presented method is suitable for converting such a material on an industrial scale. The main features are presented and an example of mass balances from the conversion of several biomass residues is given. After conversion, fractionated condensation is applied in order to retrieve two condensates -an organic-rich and an aqueousrich one. This design prevents the production of fast pyrolysis bio-oil that exhibits phase separation. A two phase bio-oil is to be expected because of the typically high ash content of straw biomass, which promotes the production of water of reaction during conversion.Both fractionated condensation and the use of biomass with high ash content demand a careful approach for establishing balances. Not all kind of balances are both meaningful and comparable to other results from the literature. Different balancing methods are presented, and the information that can be derived from them is discussed.

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Section: Representative Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor

Funke

Richter

Niebel

et al. 2016

JoVE

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“…For example, several studies have reported increasing bio-oil yields and decreasing gas and biochar yields as feedstock lignin content increased (Fahmi et al, 2008;Tröger et al, 2013). Conversely, Lv et al (2010) reported higher biochar and gas yields with increasing lignin content.…”

Section: Fluidized-bed Pyrolysis Of Selected Blendsmentioning

confidence: 99%

Blended Feedstocks for Thermochemical Conversion: Biomass Characterization and Bio-Oil Production From Switchgrass-Pine Residues Blends

et al. 2018

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An abundant, low-cost, and high-quality supply of lignocellulosic feedstock is necessary to realize the large-scale implementation of biomass conversion technologies capable of producing renewable fuels, chemicals, and products. Barriers to this goal include the variability in the chemical and physical properties of available biomass, and the seasonal and geographic availability of biomass. Blending several different types of biomass to produce consistent feedstocks offers a solution to these problems and allows for control over the specifications of the feedstocks. For thermochemical conversion processes, attributes of interest include carbon content, total ash, specific inorganics, density, particle size, and moisture content. In this work, a series of switchgrass and pine residues blends with varying physical and chemical properties were evaluated. Physical and chemical properties of the pure and blended materials were measured, including compositional analysis, elemental analysis, compressibility, flowability, density, and particle size distribution. To screen blends for thermochemical conversion behavior, the analytical technique, pyrolysis gas chromatography mass spectrometry (Py-GC/MS), was used to analyze the vapor-phase pyrolysis products of the various switchgrass/pine residues blends. The py-GC/MS findings were validated by investigating the bio-oils produced from the selected blends using a lab-scale fluidized-bed pyrolysis reactor system. Results indicate that the physical properties of blended materials are proportional to the blend ratio of pure feedstocks. In addition, pyrolysis of pine residues resulted in bio-oils with higher carbon content and lower oxygen content, while switchgrass derived pyrolysis products contained relatively greater amount of anhydrosugars and organic acids. The distribution of the pyrolysis vapors and isolated bio-oils appear to be a simple linear combination of the two feedstocks. The concentration of alkali and alkaline Edmunds et al.Blended Feedstocks for Thermochemical Conversion earth metals (Ca, K, Mg, and Na) in the blended feedstocks were confirmed to be a critical parameter due to their negative effects on the bio-oil yield. This work demonstrates that blending different sources of biomass can be an effective strategy to produce a consistent feedstock for thermochemical conversion.

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“…Co-pyrolysis of MSW with agricultural stalk potentially has some advantages, such as the remediation of the fluctuation of agricultural stalk in pyrolysis reactor and improvement of the production of pyrolysis liquid [6,7]. In addition, due to the high heating value of agricultural stalk, the heating value of liquid from co-pyrolysis would be elevated so that liquid can supply enough energy for self-heated run of co-pyrolysis reactor.…”

Section: Introductionmentioning

confidence: 99%

Copyrolysis energy analysis of municipal solid waste and agricultural stalk

Jia

Liu

et al. 2015

Env Prog and Sustain Energy

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Co-pyrolysis of municipal solid waste with cassava stalk or corn stalk was investigated in this work. Profiles of the product yields versus different agricultural stalk adding ratios during pyrolysis at 6008C reveal that the char yields reduced, and the liquid and gas yields increased at start-up stage but afterwards decreased with adding ratios of agricultural stalk increasing. The differences between experimental and theoretical yields of char ranged from 18.26 to 10.35% as cassava stalk ratios from 10 to 50%, and from 8.13 to 11.09% as corn stalk ratios from 10 to 50%. The statistical analysis of theoretical and experimental data implied the synergistic effect between municipal solid waste and agricultural stalk during co-pyrolysis process. The energy balance showed that pyrolysis of municipal solid waste alone could not produce enough pyrolysis liquid to compensate the energy consumption of pyrolysis system, and the co-pyrolysis system could dispose of municipal solid waste without extra energy input. The calculated results also showed that the feed stock comprised of 49.21% of cassava stalk or 40.12% of corn stalk could guarantee the energy balance of the co-pyrolysis system.

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Effect of feedstock composition on product yields and energy recovery rates of fast pyrolysis products from different straw types

Cited by 89 publications

References 23 publications

Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor

Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor

Blended Feedstocks for Thermochemical Conversion: Biomass Characterization and Bio-Oil Production From Switchgrass-Pine Residues Blends

Copyrolysis energy analysis of municipal solid waste and agricultural stalk

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