Reaction products from the subcritical water gasification of food wastes and glucose with NaOH and H2O2

Muangrat, Rattana; Onwudili, Jude A.; Williams, Paul T.

doi:10.1016/j.biortech.2010.03.114

Cited by 65 publications

(22 citation statements)

References 26 publications

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“…In contrast, water is a convenient solvent for biomass deconstruction because the properties of water, such as dielectric constant, density, and ionic product, can be adjusted with the temperature and pressure. There are numerous studies [11,151,25,51,60,64,68,70,71,97,98,104,124,149,152,151] on the biomass conversion in hot temperature water (HTW) and supercritical water (SCW). HTW is broadly defined to be subcritical liquid water (150°C \ T \ 374°C), and SCW is water at temperatures and pressures above the critical point (T [ 374°C and P [ 221 bar) [3,120].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Conversion of Lignocellulosic Biomass to Value-Added Organic Acids in Aqueous Media

Lin

Liu

et al. 2014

Green Chemistry and Sustainable Technology

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The transition from today's fossil-based economy to a sustainable economy based on renewable biomass is driven by the concern of climate change and anticipation of dwindling fossil resources. Although biofuels are the central theme of the transition, biomass resources cannot completely replace petroleum. It is projected that biofuels can only supply up to 30 % of today's transportation fuel market even if all available domestic biomass resources are used for the production of liquid fuels. Therefore, transformation of biomass into high-value-added chemicals is advantageous to secure optimal use of the abundant, but limited, biomass resources from the economical and ecological perspective. Industry is increasingly considering bio-based chemical production as an attractive area for investment. The potential for chemical and polymer production from biomass is substantial. The US Department of Energy recently issued a report which listed 12 chemical building blocks considered as potential building blocks for the future. Organic acids (e.g., succinic, lactic, levulinic acid, etc.) are among the widely spread ''platform-molecules,'' which may be further converted into possibly derivable high-value-added chemicals. The transition from a fossil chemical industry to a renewable chemical industry will likewise depend on our ability to focus research and development efforts on the most promising alternatives. In this chapter, we review the emerging technologies on catalytic conversion of biomass to value-added organic acids in aqueous media.

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Section: Introductionmentioning

confidence: 99%

Catalytic Conversion of Lignocellulosic Biomass to Value-Added Organic Acids in Aqueous Media

Lin

Liu

et al. 2014

Green Chemistry and Sustainable Technology

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“…Lactose gasification reactions using hydrogen peroxide (H 2 O 2 ) and tert ‐butyl hydroperoxide (t‐BHP) as oxidant agents were carried out. H 2 O 2 , an oxidant widely used in supercritical gasification oxidative reactions, shows considerable efficiency in the oxidation/destruction of biomass . The second oxidant agent (t‐BHP) is typically used in syntheses reactions, epoxidation, and hydrodesulphurization oil, among others, and has not yet been reported in the literature as an oxidant in gasification reactions.…”

Section: Resultsmentioning

confidence: 99%

“…H 2 O 2 , an oxidant widely used in supercritical gasification oxidative reactions, shows considerable efficiency in the oxidation/destruction of biomass. [17][18][19][20] The second oxidant agent (t-BHP) is typically used in syntheses reactions, epoxidation, and hydrodesulphurization oil, among others, [21][22][23][24] and has not yet been reported in the literature as an oxidant in gasification reactions. The lactose TOC reduction was evaluated as a function of lactose concentration, temperature, and oxidant type.…”

Section: Reduction Of Tocmentioning

confidence: 99%

Supercritical water oxidation of lactose

et al. 2017

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New data on total organic carbon (TOC) reduction and H2 production were obtained by using supercritical water oxidation of lactose with and without oxidant agents (H2O2 and t‐BHP) in a continuous Inconel 625 flow reactor. The oxidation reactions were carried out at 550 and 700 °C, 22.5 MPa, 0.025 g/g (2.5 wt%) lactose concentration, feed flow rate of 5 g · min−1, and a total reaction time of 90 min. The average production of H2 yielded 4.5 mol/mol lactose with TOC reduction of ∼99 %. The results obtained in this study with supercritical water oxidation (SCWO) may be used to generate energy via production of H2 from dairy industry effluents.

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“…Fig. 10.9 Yields of gas products from glucose gasification in relation to the type of alkaline additive [60,67] For effective hydrogen production, a large quantity of the alkali must be used, usually in a ratio of 1 g biomass/1.2 g alkali [36,60]. This has cost implications for the HTG process.…”

Section: ð10:19þmentioning

confidence: 99%

“…In a batch reactor, heating rates affect the total amount of time the reactants stay in the [60] reactor and this has considerable effect on the formation of key intermediates [64]. Additionally, the thermodynamics of the system and product concentrations could affect hydrogen yield.…”

Section: Residence Time and Heating Ratementioning

confidence: 99%

Hydrothermal Gasification of Biomass for Hydrogen Production

Onwudili

2014

Green Chemistry and Sustainable Technology

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Over 90 % of the world's current hydrogen production capacity comes from the use of fossil fuels including coal, oil, and natural gas. In recent years, natural gas has become the major source of hydrogen. However, these fossil fuels are finite resources, produce greenhouse gases, and will eventually run out. Biomass presents a proven store of chemical energy, which can be converted into hydrogen by various processes. Hydrogen from biomass will be the world's cleanest fuel, being produced from a renewable carbon-neutral source and its combustion produces no carbon emissions. Hydrothermal gasification has the potential to produce high quality and high yield of hydrogen from, especially, very wet biomass feedstocks and particularly the carbohydrate-rich types. Water is an important reactant for hydrogen production in biomass HTG, thereby avoiding dewatering of wet feedstocks. The chemistry of hydrogen production from biomass HTG largely depends on the reforming of biomass into simple organic molecules that are capable of being gasified into carbon monoxide. Hydrogen is then produced via water-gas shift reaction. The developments of various reactor designs and catalysts for high hydrogen selectivities are ongoing at various research centers around the world. A great deal of knowledge about this process is available, however, there are still challenges regarding the stability and recovery of catalysts, preprocessing of biomass for continuous operations and other process optimization and intensification issues.

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Reaction products from the subcritical water gasification of food wastes and glucose with NaOH and H2O2

Cited by 65 publications

References 26 publications

Catalytic Conversion of Lignocellulosic Biomass to Value-Added Organic Acids in Aqueous Media

Catalytic Conversion of Lignocellulosic Biomass to Value-Added Organic Acids in Aqueous Media

Supercritical water oxidation of lactose

Hydrothermal Gasification of Biomass for Hydrogen Production

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