Steam reforming of acetic acid – A major component in the volatiles formed during gasification of humin

Hoang, Thi Minh Chau; Geerdink, Bert; Sturm, Jacobus Marinus; Lefferts, Leon; Seshan, Kulathuiyer

doi:10.1016/j.apcatb.2014.07.046

Cited by 46 publications

(23 citation statements)

References 37 publications

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“…It typically contains 40–50 % cellulose, 20–40 % hemicellulose and 20–30 % lignin . Consequently, the efficient valorization of cellulose is a very important and also challenging topic ,. In general, cellulose conversion processes are complicated by the fact that this biopolymer is insoluble in water and most organic solvents.…”

Section: Introductionmentioning

confidence: 99%

“…FA on the other hand is an environmental friendly hydrogen source and therefore an easily accessible natural energy storage molecule . During all processes that include monosaccharides or 5‐hydroxymethylfurfural (5‐HMF), dark colored and solid humins occur ,. Humins are nearly insoluble in all commonly known solvents.…”

Section: Introductionmentioning

confidence: 99%

“…So far humins can be used in a steam reforming process with a H 2 /CO ratio of 2. At complete conversion the selectivity towards synthesis gas is 75 % ,,. However, an energy intensive downstreaming followed by a complete drying process of the humins is necessary.…”

Section: Introductionmentioning

confidence: 99%

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Selective Catalytic Oxidation of Humins to Low‐Chain Carboxylic Acids with Tailor‐Made Polyoxometalate Catalysts

et al. 2017

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For the first time, a selective catalytic conversion of thermally induced side products (humins) from biomass valorization to short‐chain carboxylic acids like formic acid and acetic acid is reported. Very interestingly, we found that homogeneous polyoxometalate catalysts could selectively oxidize humins from sugar‐derived levulinic acid production to formic acid and acetic acid under very mild conditions in a simple monophasic aqueous approach. This green and sustainable process offers a very cost‐effective and sustainable way for the conversion of undesired humins and benefits from its low reaction temperature (90‐120 °C) and its tunable product distribution. By variation of process parameters and chemical composition of the POM structures, we could control both product selectivity and humin conversion. Furthermore, catalyst recycling over three batches has been successfully carried out.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Selective Catalytic Oxidation of Humins to Low‐Chain Carboxylic Acids with Tailor‐Made Polyoxometalate Catalysts

et al. 2017

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“…Nevertheless, the acidity of Al 2 O 3 promotes the formation of coke, reducing the stability of the catalysts. Li et al [97] O 3 have also been studied in the steam reforming of bio-oils, and they showed their unique advantages [35,75,[100][101][102][103][104][105][106][107][108]. Especially, there are many hydrophilic basic sites on the surface of MgO, which can inhibit the carbon deposition by the adsorption of water and, simultaneously, they can also enhance the gasification of carbon [35,100].…”

Section: Oxide Supportsmentioning

confidence: 99%

Hydrogen Production from Catalytic Steam Reforming of Bio‐Oils: A Critical Review

Zhao

Situmorang

et al. 2020

Chem Eng & Technol

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In the future, hydrogen will be an important energy carrier and industrial raw material. Catalytic steam reforming of bio‐oils is a promising and economically viable technology for hydrogen production. However, during the reforming process, the catalysts are rapidly deactivated due to coke formation and sintering. Thus, maintaining the activity and stability of catalysts is the key issue in this process. Optimized operation conditions could extend the catalyst lifetime by affecting the coke morphology or promoting coke gasification. This article summarizes the recent developments in the field of catalytic steam reforming of bio‐oils, focusing on the operation conditions, the properties of the catalysts, and the effects of the catalyst supports. The expected insights into the catalytic steam reforming of bio‐oils will provide further guidance for hydrogen production from bio‐oils.

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“…Other methods use catalytic reforming which necessitated specific working condition (high temperature, use of a catalyst, etc.) but they are considered as "destructive methods" since the VFAs are completely transformed at the end [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Electrodes Modification Based on Metal-Free Phthalocyanine: Example of Electrochemical Sensors for the Detection of Acetic Acid

et al. 2015

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Electroanalytical properties of tetra-tert-butyl phthalocyanine (PcH 2 -tBu) modified electrodes are studied by cyclic voltammetry (CV). The modified electrodes are obtained by CV deposition techniques on gold (Au) and glassy carbon (C) screenprinted electrodes (SPEs) and used for the electrochemical detection of acetic acid (AA). Based on the CV experiments, the electrodeposition mechanism is detailed. The modified PcH 2 -tBu electrodes reveal one oxidation and one reduction peak within the potential window of the working electrodes. In the presence of the analyte (acetic acid), the modified electrodes show sensitivity in the range of 10 mM to 400 mM. For the PcH 2 -tBu modified Au electrode, a limit of detection (LOD) of 5.89 mM (based on the +0.06 V peak) was obtained while for the PcH 2 -tBu modified C electrode a LOD of 17.76 mM (based on the +0.07 V peak) was achieved. A signal decay of 17%, based on 20 experiments, is obtained when gold is used as working electrode. If carbon is used as working electrode a value of 7% is attained. A signal decay is observed after more than 50 cycles of experiments and is more pronounced when higher concentrations of acetic acid are used. A mechanism of sensing is proposed at the end.

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Steam reforming of acetic acid – A major component in the volatiles formed during gasification of humin

Cited by 46 publications

References 37 publications

Selective Catalytic Oxidation of Humins to Low‐Chain Carboxylic Acids with Tailor‐Made Polyoxometalate Catalysts

Selective Catalytic Oxidation of Humins to Low‐Chain Carboxylic Acids with Tailor‐Made Polyoxometalate Catalysts

Hydrogen Production from Catalytic Steam Reforming of Bio‐Oils: A Critical Review

Electrodes Modification Based on Metal-Free Phthalocyanine: Example of Electrochemical Sensors for the Detection of Acetic Acid

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