Hydrogen production from water and CO via alkali metal formate salts

Onsager, O.T.

doi:10.1016/0360-3199(96)00031-6

Cited by 53 publications

(20 citation statements)

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“…The increase in the amount of the inorganic carbon in the liquid effluent might be due to sodium salt formation, as after the hydrothermal gasification, they would be dissolved in the aqueous phase. For example, sodium formates could react with water to yield sodium bicarbonate and H2 as shown in Equation 7 [22,23]. Table 1 shows that the carbon gasification efficiency in the presence of NaOH, was 57.7% at 0 min.…”

Section: Supercritical Water Gasification Of Rdf With Naoh Additivementioning

confidence: 99%

Catalytic Supercritical Water Gasification of Refuse Derived Fuel for High Energy Content Fuel Gas

Yıldırır

Onwudili

Williams

2016

Waste Biomass Valor

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Refuse derived fuel (RDF) was processed using hydrothermal gasification at high temperature to obtain a high energy content fuel gas. Supercritical water gasification of RDF was conducted at a temperature of 500 °C and 29 MPa pressure and also in the presence of a solid RuO2/ -Al2O3 catalyst. The effect of residence time (0, 30 and 60 min) and different ruthenium loadings (5, 10, 20 wt.% RuO2/ -Al2O3) were investigated. Up to 93% carbon gasification efficiency was achieved in the presence of 20 wt.% RuO2/ -Al2O3 catalyst. The fuel gas with the highest energy value of 22.5 MJ Nm -3 was produced with the 5 wt.% RuO2/ -Al2O3 catalyst after 30 min. reaction time. The results were compared with the use of NaOH as a homogeneous catalyst. When NaOH was used, the maximum gross calorific value of the product gas was 32.4 MJ Nm -3 at 60 min. reaction time as a result of CO2 fixation. High yields of H2 and CH4 were obtained in the presence of both the NaOH and RuO2/ -Al2O3 catalysts.

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Section: Supercritical Water Gasification Of Rdf With Naoh Additivementioning

confidence: 99%

Catalytic Supercritical Water Gasification of Refuse Derived Fuel for High Energy Content Fuel Gas

Yıldırır

Onwudili

Williams

2016

Waste Biomass Valor

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“…[4d,e, 12,13] From the mid-1990s, the decomposition of formates or formic acid base adducts has been studied as the undesired back-reaction in catalytic CO 2 hydrogenation. With rhodium phosphine catalysts, Leitner et al…”

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confidence: 99%

Controlled Generation of Hydrogen from Formic Acid Amine Adducts at Room Temperature and Application in H₂/O₂ Fuel Cells

et al. 2008

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“…It was suggested by Kruse et al that an increase of potassium hydroxide (KOH) on the gasification of pyrocatechol in supercritical water, led to an increase in hydrogen (H 2 ) and carbon dioxide (CO 2 ) yields [12]. Onsager et al found that the increase in H 2 and CO 2 yield, in the presence of K 2 CO 3 , is due to the enhancement of the water-gas shift reaction by the intermediate formation of formate salt (HCOOK) [13]. On the other hand, the addition of a catalyst would inhibit the formation of residual solid and make the residual solid lighter.…”

Section: Effect Of K 2 Co 3 Concentrationmentioning

confidence: 97%

Recovery of Phenol through the Decomposition of Tar under Hydrothermal Alkaline Conditions

et al. 2006

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Decomposition of the tar residue from oil distillation was carried out under hydrothermal conditions using a batch reactor at 623-673 K and 25-40 MPa, with and without K 2 CO 3 as a catalyst. The reaction scheme for tar decomposition was determined as follows: the liquefaction and dissolution process of tar occur first and then intermediate chemical compounds are transformed into lighter molecular weight species. The presence of K 2 CO 3 activates the dissociation of molecular hydrogen to facilitate hydrogenation reactions. The main products from the decomposition of tar were phenol, biphenyl, diphenylether (DPE), and diphenylmethane (DPM). These results indicate that hydrolysis was important in the cleavage of the macromolecular structure of tar under both catalytic and non-catalytic hydrothermal conditions. This method can be developed for efficient tar liquefaction to generate high yields of valuable chemicals in an environmentally friendly way.

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Hydrogen production from water and CO via alkali metal formate salts

Cited by 53 publications

References 0 publications

Catalytic Supercritical Water Gasification of Refuse Derived Fuel for High Energy Content Fuel Gas

Catalytic Supercritical Water Gasification of Refuse Derived Fuel for High Energy Content Fuel Gas

Controlled Generation of Hydrogen from Formic Acid Amine Adducts at Room Temperature and Application in H₂/O₂ Fuel Cells

Recovery of Phenol through the Decomposition of Tar under Hydrothermal Alkaline Conditions

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Hydrogen production from water and CO via alkali metal formate salts

Cited by 53 publications

References 0 publications

Catalytic Supercritical Water Gasification of Refuse Derived Fuel for High Energy Content Fuel Gas

Catalytic Supercritical Water Gasification of Refuse Derived Fuel for High Energy Content Fuel Gas

Controlled Generation of Hydrogen from Formic Acid Amine Adducts at Room Temperature and Application in H2/O2 Fuel Cells

Recovery of Phenol through the Decomposition of Tar under Hydrothermal Alkaline Conditions

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Controlled Generation of Hydrogen from Formic Acid Amine Adducts at Room Temperature and Application in H₂/O₂ Fuel Cells