Two-stage thermal conversion of inedible lipid feedstocks to renewable chemicals and fuels

Asomaning, Justice; Mussone, Paolo; Bressler, David C.

doi:10.1016/j.biortech.2014.01.136

Cited by 36 publications

(20 citation statements)

References 33 publications

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“…Corroborating our previous work, recent detailed studies of thermal decomposition of naturally occurring cis-oleic and linoleic acids [25,26] yielded similar product compositions, although at much longer reaction times. Bressler and co-workers suggested a twostep process of TG oil hydrotreatment followed by pyrolysis, which is applicable to both whole and waste oils [27,28]. The reasons for product similarity and difference in reaction times for these two systems are addressed in this study.…”

Section: Introductionmentioning

confidence: 98%

Cleavage of Carboxylic Acid Moieties in Triacylglycerides During Non‐Catalytic Pyrolysis

Kubátová

Geetla

Casey

et al. 2015

J Americ Oil Chem Soc

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Noncatalytic pyrolysis of triacylglyceride (TG) oils is an attractive option for production of renewable fuels and chemicals. This process produces 20–30 wt% of C2–C10 fatty acids due to the presence of carboxyl moieties in TG. To decipher this process’ mechanism, several compositionally distinct crop oil feedstocks with varied abundances of C18 saturated and unsaturated TG carboxylic acid chains were pyrolyzed for short residence times in a laboratory‐scale continuous turbulent flow reactor. A comprehensive gas chromatographic analysis of the oxygenated products revealed the selective formation of linear saturated monocarboxylic acids (LSMCA) of less than C11 in size, with a specific homological pattern featuring peaks for C2–C3, C7 and C9–C10 LSMCA. The relative abundance of these size groups varied amongst the feedstocks cracked due to variations in the abundance of triunsaturated (linolenic), diunsaturated (linoleic) and monounsaturated (oleic) acids, respectively, in the original TG. We proposed a mechanism explaining the observed product speciation and homology profiles by the formation of acyloxyl biradicals as essential intermediates. High‐temperature C=C π‐bond hydrogenation with a concomitant σ‐bond cleavage yields C9–C10 LSMCA. This new path was confirmed by pyrolysis experiments with triolein in a GC pyroprobe.

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Section: Introductionmentioning

confidence: 98%

Cleavage of Carboxylic Acid Moieties in Triacylglycerides During Non‐Catalytic Pyrolysis

Kubátová

Geetla

Casey

et al. 2015

J Americ Oil Chem Soc

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“…According to the calculated DG, the formation of alkanes with a wide carbon distribution depends on the dissociation position of the C-C bonds of LAME and the subsequent recombination of the fragments, with the DG for the C-C formation being À233.2 kJ mol À1 . For esters, the cleavage of the C-C bonds ought to occur at a higher temperature (Asomaning et al, 2014b). In contrast, the cleavage of the C-C bonds took place at a relatively lower temperature (350°C) in the SDR process, suggesting that the elevated pressure and the synergic effect between cellulose and LAME accelerates the cleavage of the C-C bonds of LAME.…”

Section: Entrymentioning

confidence: 98%

Synergetic deoxy reforming of cellulose and fatty acid esters for liquid hydrocarbon-rich oils

Wang

Sui

et al. 2015

Bioresource Technology

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“…Instead, this was the final experimental step for the batch reactor samples and this OLP was analyzed in detail in the study and then used in simulation models for the remaining steps in the process. The processing of non-catalytically cracked TG oils at the lab-scale into DCB transportation fuels has been reported previously [14][15][16]23].…”

Section: Post-cracking Sample Processingmentioning

confidence: 99%

“…Fuels generated from TG oils have negligible sulfur and metals content, further increasing their value as environmentally friendly alternatives to petroleum-based fuels. While technologies based on hydroprocessing [2] are the first to enter the commercial domain, noncatalytic cracking is considered the most developed TG oil-based technology that produces true DCBs [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Fatty Acid Composition on Transportation Fuel Yields via the Non‐Catalytic Cracking of Triacylglyceride Oils

Seames

Linnen

Sander

et al. 2017

J Americ Oil Chem Soc

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A wide spectrum of triacylglyceride (TG) oils were decomposed in batch lab and continuous pilot‐scale reactors to generate an extensive database, which was then used to construct a model to predict the detailed composition of products generated during non‐catalytic cracking. The model was then coupled with additional simulated process steps to determine the yields of transportation products and other chemical co‐products meeting specifications of their petroleum analogs as validated with laboratory testing. A statistical study was then performed to use the model to analyze the impact that changes in TG oil composition have upon target product yields. In this study, the model was used to simulate a viable suite of products for every TG oil analyzed. The model predicts minor differences in the ratio of products from various different fatty acid compositions. For example, it was found that stearic (C18:0), oleic (C18:1), and erucic (C22:1) acids show a positive effect on fuel yields. By contrast, palmitic (C16:0), linoleic (C18:2), and linolenic (C18:3) acids have negative impacts on fuel yields. From these results, a hypothetical “ideal” TG oil was constructed. This oil turns out to have a composition that is very close to the composition of high oleic sunflower oil.

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Two-stage thermal conversion of inedible lipid feedstocks to renewable chemicals and fuels

Cited by 36 publications

References 33 publications

Cleavage of Carboxylic Acid Moieties in Triacylglycerides During Non‐Catalytic Pyrolysis

Cleavage of Carboxylic Acid Moieties in Triacylglycerides During Non‐Catalytic Pyrolysis

Synergetic deoxy reforming of cellulose and fatty acid esters for liquid hydrocarbon-rich oils

The Impact of Fatty Acid Composition on Transportation Fuel Yields via the Non‐Catalytic Cracking of Triacylglyceride Oils

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