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An acidic two - step hydrothermal process to enhance acetic acid production from carbohydrate biomass / Yan Fang in Industrial & engineering chemistry research, Vol. 51 N° 12 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 12 (Mars 2012) . - pp. 4759–4763 Titre : An acidic two - step hydrothermal process to enhance acetic acid production from carbohydrate biomass Type de document : texte imprimé Auteurs : Yan Fang, Auteur ; Xu Zeng, Auteur ; Peng Yan, Auteur Année de publication : 2012 Article en page(s) : pp. 4759–4763 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Hydrothermal  process  Carbohydrate  Biomass Résumé : An acidic two-step hydrothermal process to improve acetic acid production was investigated. In the first-step reaction, levulinic acid is formed in the presence of an acid catalyst. In the second-step reaction, the levulinic acid is converted into acetic acid via oxidation with newly supplied oxygen. The acetic acid yield from this two-step process was much higher than that without the acid catalysts in the first step. The acetic acid yield reached 23% with a purity of 47% from glucose and 26% with a purity of 52% from fructose. These yields were achieved at a reaction temperature of 523 K, a reaction time of 300 s, and pH 0.5 with HCl as an acid catalyst for the first step and at a reaction temperature of 523 K, a reaction time of 60 s, and an oxygen supply of 100% for the second step. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202506c [article] An acidic two - step hydrothermal process to enhance acetic acid production from carbohydrate biomass [texte imprimé] / Yan Fang, Auteur ; Xu Zeng, Auteur ; Peng Yan, Auteur . - 2012 . - pp. 4759–4763. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 12 (Mars 2012) . - pp. 4759–4763 Mots-clés : Hydrothermal  process  Carbohydrate  Biomass Résumé : An acidic two-step hydrothermal process to improve acetic acid production was investigated. In the first-step reaction, levulinic acid is formed in the presence of an acid catalyst. In the second-step reaction, the levulinic acid is converted into acetic acid via oxidation with newly supplied oxygen. The acetic acid yield from this two-step process was much higher than that without the acid catalysts in the first step. The acetic acid yield reached 23% with a purity of 47% from glucose and 26% with a purity of 52% from fructose. These yields were achieved at a reaction temperature of 523 K, a reaction time of 300 s, and pH 0.5 with HCl as an acid catalyst for the first step and at a reaction temperature of 523 K, a reaction time of 60 s, and an oxygen supply of 100% for the second step. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202506c

Direct and highly efficient reduction of NiO into Ni with cellulose under hydrothermal conditions / Guodong Yao in Industrial & engineering chemistry research, Vol. 51 N° 23 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7853-7858 Titre : Direct and highly efficient reduction of NiO into Ni with cellulose under hydrothermal conditions Type de document : texte imprimé Auteurs : Guodong Yao, Auteur ; Xu Zeng, Auteur ; Qiuju Li, Auteur Année de publication : 2012 Article en page(s) : pp. 7853-7858 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydrothermal  condition Résumé : A direct reduction of NiO into Ni was investigated by using cellulose as a reducing agent under mild hydrothermal conditions. The results showed that NiO can be reduced completely to Ni at 250 °C in the presence of NaOH. Meanwhile, cellulose was converted into value-added chemicals, such as lactic acid and acetic acid. A possible mechanism for reduction of NiO into Ni with cellulose under alkaline hydrothermal conditions was proposed. The method provides a comparative green and efficient conversion of NiO into Ni without an expensive and toxic reducing agent at low temperatures. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25990298 [article] Direct and highly efficient reduction of NiO into Ni with cellulose under hydrothermal conditions [texte imprimé] / Guodong Yao, Auteur ; Xu Zeng, Auteur ; Qiuju Li, Auteur . - 2012 . - pp. 7853-7858. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7853-7858 Mots-clés : Hydrothermal  condition Résumé : A direct reduction of NiO into Ni was investigated by using cellulose as a reducing agent under mild hydrothermal conditions. The results showed that NiO can be reduced completely to Ni at 250 °C in the presence of NaOH. Meanwhile, cellulose was converted into value-added chemicals, such as lactic acid and acetic acid. A possible mechanism for reduction of NiO into Ni with cellulose under alkaline hydrothermal conditions was proposed. The method provides a comparative green and efficient conversion of NiO into Ni without an expensive and toxic reducing agent at low temperatures. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25990298

A Potentially useful technology by mimicking nature — rapid conversion of biomass and CO2 into chemicals and fuels under hydrothermal conditions / Fangming Jin in Industrial & engineering chemistry research, Vol. 51 N° 30 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 9921-9937 Titre : A Potentially useful technology by mimicking nature — rapid conversion of biomass and CO2 into chemicals and fuels under hydrothermal conditions Type de document : texte imprimé Auteurs : Fangming Jin, Auteur ; Xu Zeng, Auteur ; Zhenzi Jing, Auteur Année de publication : 2012 Article en page(s) : pp. 9921-9937 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydrothermal  condition  Fuel  Carbon  dioxide  Biomass Résumé : To diminish a serious global energy crisis and global warming caused by the imbalance between the slow formation of fossil fuels and rapid consumption by human activities, the developing of the technology for quickly turning biomass and CO2 into fuels and chemicals is needed. Hydrothermal reactions, which can be recognized as an effective pathway in the carbon cycle, played an important role in forming petroleum, natural gas, and coal from organic wastes. If humans could simulate the natural phenomena of the formation of fossils, then, it should quickly turn biomass and CO2 into fuels and chemicals. This paper gives an overview of some recent studies on hydrothermal conversion of biomass such as carbohydrate, lignin, and glycerin into value-added chemicals. Some recent advance in hydrothermal reduction of CO2 is also presented. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201404 [article] A Potentially useful technology by mimicking nature — rapid conversion of biomass and CO2 into chemicals and fuels under hydrothermal conditions [texte imprimé] / Fangming Jin, Auteur ; Xu Zeng, Auteur ; Zhenzi Jing, Auteur . - 2012 . - pp. 9921-9937. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 9921-9937 Mots-clés : Hydrothermal  condition  Fuel  Carbon  dioxide  Biomass Résumé : To diminish a serious global energy crisis and global warming caused by the imbalance between the slow formation of fossil fuels and rapid consumption by human activities, the developing of the technology for quickly turning biomass and CO2 into fuels and chemicals is needed. Hydrothermal reactions, which can be recognized as an effective pathway in the carbon cycle, played an important role in forming petroleum, natural gas, and coal from organic wastes. If humans could simulate the natural phenomena of the formation of fossils, then, it should quickly turn biomass and CO2 into fuels and chemicals. This paper gives an overview of some recent studies on hydrothermal conversion of biomass such as carbohydrate, lignin, and glycerin into value-added chemicals. Some recent advance in hydrothermal reduction of CO2 is also presented. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201404