Thermal decomposition of mixed calcium carboxylate salts: Effects of lime on ketone yield

Landoll, Michael P.; Holtzapple, Mark T.

doi:10.1016/j.biombioe.2011.05.012

Cited by 22 publications

(15 citation statements)

References 17 publications

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“…B. The mixed ketone price is the assumed average of prices of the given ketone prices, in accordance with the distribution given by Landoll et al Furthermore, it is assumed that ketones higher than methyl‐ethyl‐ketone (MEK) share its market value.…”

Section: Methodsmentioning

confidence: 98%

“…The process model for producing carboxylates by bacterial fermentation of sugarcane residues was taken as a pre‐defined process for the pre‐treatment and fermentation process, and applied for all downstream alternatives. The flowsheet for recovery as ketones considers one process that is well established in literature with pilot demonstrations, while the recovery of carboxylates as VFAs considers alternatives for the acidification and separation steps that are summarized in Table .…”

Section: Introductionmentioning

confidence: 99%

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Comparison of recovery of volatile fatty acids and mixed ketones as alternative downstream processes for acetogenisis fermentation

Petersen

Franco

Görgens

2018

Biofuels Bioprod Bioref

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Carboxylates produced by the acetogenisis fermentation of pre‐treated lignocelluloses are precursors to bio‐based products that are alternatives to second‐generation biofuels for biomass valorization. This paper compares the techno‐economic indicators for recovering either mixed ketones or mixed volatile fatty acid (VFA) products from the carboxylates in a fermentation broth through process simulation and financial modeling. This study considers scenarios for (i) an efficient process for ketone production (K‐P) involving dehydration, thermal conversion, and condensation already established in the literature; (ii) VFA production (VFA‐P) with conventional methods of carboxylate acidification and separation; and (iii) advanced VFA acidification and separation methods. In conventional acidification, using mineral acids and calcium alkalis results in wastes; while in advanced acidification, the acids and bases are regenerated. Conventional separation relies on ethyl‐acetate extraction, while advanced separation relies on amine extraction. Scenarios are compared in terms of energy and chemical use, and the internal rates of return (IRR) determined with price ranges assumed for mixed VFAs and mixed ketones. Thus, with optimistic product prices, K‐P and VFA‐P with conventional acidification‐separation have indentical IRRs at 35%, but K‐P is favorable due to the chemical‐intensiveness and waste generation of the VFA‐P. Using advanced acidification and separation could possibly improve the IRR of VFA‐P to 39%, with a capital investment of 2% above that of K‐P, which was estimated at US$ 293 million. Otherwise, a previously patented scheme that integrated acidification and separation based on amine complexation could also produce a VFA process that is environmentally and economically feasible. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd

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Section: Methodsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Comparison of recovery of volatile fatty acids and mixed ketones as alternative downstream processes for acetogenisis fermentation

Petersen

Franco

Görgens

2018

Biofuels Bioprod Bioref

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“…The distribution of the resulting ketones was determined using the thermodynamically favored ratios calculated with a Gibbs reactor in AspenPlus™. This approach has also been used by Holtzapple and was found to be representative of experimental findings. These ratios were then converted into a stoichiometric equation for use in an AspenPlus™ stoichiometric reactor modeling the thermal ketonization.…”

Section: Approach and Methodologymentioning

confidence: 94%

Techno‐economic comparison of three scenarios for upgrading a hemicellulose‐rich pre‐pulping extract to mixed‐alcohols

Engelberth

Wheeler

Walsum

2018

Biofuels Bioprod Bioref

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Conversion of a hemicellulose‐rich pre‐pulping extract into long‐chain alcohols could alleviate problems facing the liquid fuel supply and could boost the revenues of pulp mills. Kraft pulping requires only the cellulose fraction of wood, leaving much of the hemicellulose available for extraction and subsequent conversion into gasoline‐blendable alcohols. Three possible pathways for upgrading the hemicelluloses are: CKA: carboxylates → ketones → alcohols; CEA: carboxylates → esters → alcohols, and CHEA: carboxylates → acids → esters → alcohols. The scenarios were modeled using AspenPlus® to determine material and energy balances. Economic parameters were determined using the Aspen Process Economic Analyzer. The minimum ethanol selling price (MESP) for a 1000 tpd facility, which takes into account the operating and capital costs, was found to be: $3.31 for CKA, $4.56 for CEA, and $4.26 for the CHEA. The cost of hydrogen necessary for hydrogenolysis proved to be a notable expense. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd

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“…Finally, the mass concentration for the ketone mixture was calculated and compared to the experimental values. Landoll [5] provides an alternative model (Gibbs free energy minimization) to predict ketone profiles better than random pairing. The model considers both the thermodynamic and kinetic aspects of the thermal decomposition, as well as the production of by-products.…”

Section: Ketonizationmentioning

confidence: 99%

“…The descummed RFB is dewatered by evaporation, which crystallizes the carboxylate salts. In a batch reactor [5], the salts are thermochemically transformed into raw ketones, which are distilled and then hydrogenated to mixed alcohols [6]. In a Plug-Flow Reactor (PFR), the mixed alcohols are dehydrated and oligomerized using a zeolite catalyst.…”

Section: Introductionmentioning

confidence: 99%

Biomass Conversion to Hydrocarbon Fuels Using the MixAlco^TMProcess

Taco-Vasquez

Holtzapple

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Conversion de la biomasse en combustibles hydrocarbonés au moyen du procédé MixAlco™ -Le procédé MixAlco™ convertit la biomasse en hydrocarbures (par exemple, en essence) selon les étapes génériques suivantes : prétraitement, fermentation, écumage, déshydratation, cétonisation thermique, distillation, hydrogénation, oligomérisation et saturation. Cette étude décrit la production de bioessence à partir de fumier de poulet et de papier en lambeaux, ces deux sources étant des matières premières convoitées ne nécessitant pas de prétraitement. À l'aide d'une culture mixte de microorganismes dérivés de sols marins, la biomasse a été soumise à une fermentation de manière à produire une solution aqueuse diluée de sels de carboxylates, ultérieurement écumés et séchés. Les sels séchés ont été thermiquement convertis en cétones brutes, ensuite distillées afin d'éliminer les impuretés. À l'aide du catalyseur à base de nickel de Raney, les cétones distillées ont été hydrogénées en alcools secondaires mixtes allant de C3 à C12. En utilisant le catalyseur supporté sur zéolite HZSM-5, ces alcools ont été oligomérisés en hydrocarbures dans un réacteur à écoulement piston. Enfin, ces hydrocarbures insaturés ont été hydrogénés afin de produire un mélange d'hydrocarbures pouvant être combiné à l'essence commerciale.

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Thermal decomposition of mixed calcium carboxylate salts: Effects of lime on ketone yield

Cited by 22 publications

References 17 publications

Comparison of recovery of volatile fatty acids and mixed ketones as alternative downstream processes for acetogenisis fermentation

Comparison of recovery of volatile fatty acids and mixed ketones as alternative downstream processes for acetogenisis fermentation

Techno‐economic comparison of three scenarios for upgrading a hemicellulose‐rich pre‐pulping extract to mixed‐alcohols

Biomass Conversion to Hydrocarbon Fuels Using the MixAlco^TMProcess

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Thermal decomposition of mixed calcium carboxylate salts: Effects of lime on ketone yield

Cited by 22 publications

References 17 publications

Comparison of recovery of volatile fatty acids and mixed ketones as alternative downstream processes for acetogenisis fermentation

Comparison of recovery of volatile fatty acids and mixed ketones as alternative downstream processes for acetogenisis fermentation

Techno‐economic comparison of three scenarios for upgrading a hemicellulose‐rich pre‐pulping extract to mixed‐alcohols

Biomass Conversion to Hydrocarbon Fuels Using the MixAlcoTMProcess

Contact Info

Product

Resources

About

Biomass Conversion to Hydrocarbon Fuels Using the MixAlco^TMProcess