Methanol Reforming in Supercritical Water for Hydrogen Production

Boukis, Ν.; Diem, V.; Galla, U.; Dinjus, E.

doi:10.1080/00102200500292316

Cited by 37 publications

(22 citation statements)

References 35 publications

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“…Based on the promising lab-scale results, a process development unit was constructed at the Research Center Karlsruhe. In the Institute for Technical Chemistry CPV a plant with a throughput of 100 kg/h, which can be operated up to 700 • C and 35 MPa, was built up and is in operation [105]. This plant consists of components, which can be scaled-up.…”

Section: Supercritical Water Gasificationmentioning

confidence: 99%

Influence of Salts During Hydrothermal Biomass Gasification: The Role of the Catalysed Water-Gas Shift Reaction

Kruse¹,

Dinjus²

2005

Zeitschrift Für Physikalische Chemie

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Biomass Gasification / Salt Effects / Supercritical Water / Water-Gas Shift ReactionNear-critical and supercritical water is an unusual reaction medium with extraordinary properties, varying with temperature and density. This opens the opportunity for new reactions and new technical processes. In the studies of synthesis reactions, total oxidation and biomass gasification interesting effects of salts are observed. These effects are assumed to be caused by complex formation, acidity/basicity or the presence of active hydrogen due to the water-gas shift reaction. The water-gas shift reaction is catalysed by salts and lead to the formation of hydrogen, which might react with other compounds.This article focuses on the salt effects during hydrogen production by biomass gasification in supercritical water. This is a very interesting process to make use of "wet biomass", which is up to now not applied in a technical process. Here salts influenced the main reactions pathways. Possible reasons are discussed.

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Section: Supercritical Water Gasificationmentioning

confidence: 99%

Influence of Salts During Hydrothermal Biomass Gasification: The Role of the Catalysed Water-Gas Shift Reaction

Kruse¹,

Dinjus²

2005

Zeitschrift Für Physikalische Chemie

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“…During supercritical water gasification, biomass is decomposed into small molecules or gases in a few minutes at a high efficiency with high hydrogen yields. In the gasification of biomass, a high water‐to‐feed ratio enhances the hydrogen yield .…”

Section: Hydrogen Production From Biomassmentioning

confidence: 99%

Biomass‐derived hydrogen energy potential in Africa

Amuzu-Sefordzi

Huang

Sowa

et al. 2015

Env Prog and Sustain Energy

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Researchers in recent times have been looking at the promising potential of hydrogen energy. This potential when fully realized can help meet the growing global energy demand which has been as a result of population growth. In this context, hydrogen energy potential from the fuel wood and agricultural residue produced in African countries is assessed. This study analyses annual electricity consumption displacement when hydrogen energy is used for electrification purposes. The results show that Africa has the potential to produce a total of about 350,000 GWh of hydrogen energy from fuel wood and agricultural residue annually. Also, more than a 100% of the annual electricity consumption in West Africa can be displaced by hydrogen energy from these biomass resources. Annual motor‐gasoline consumption displacement and direct CO2 emission reductions as a result of using hydrogen energy are also studied in this article. This study is the first of its kind and serves as a baseline for the life cycle assessment of hydrogen energy technologies in Africa. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 289–297, 2016

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“…This assumed temperature at the outlet of a counterflow heat exchanger is slightly lower than the temperature found experimentally in a pilot plant. Details to these experiments can be found in Boukis et al (2004). Subsequently, the reaction mixture is heated to the final reaction temperature of 6008C by a second heat exchanger (D1).…”

Section: Process Descriptionmentioning

confidence: 99%

Exergetic efficiency and options for improving sewage sludge gasification in supercritical water

Gasafi

Meyer

Schebek

2007

Int. J. Energy Res.

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SUMMARYThe present article deals with an exergy analysis of a process under development for the gasification of biomass in supercritical water (supercritical water gasification, SCWG). This process is aimed at generating hydrogen out of the biogenic feedstock sewage sludge. The principle of the process is based on making use of the modifications of specific physical and chemical properties of water above the critical point (T ¼ 3748C, p ¼ 221 bar). These properties allow for a nearly complete conversion of the organic substance contained in the feed material into energy-rich fuel gases, containing hydrogen, carbon dioxide and methane. Based on a steady-state model of the process, exergy flow rates are calculated for all components and a detailed exergy analysis is performed. From the exergetic variables, options to improve the individual plant components as well as the overall plant are derived. The components with the highest proportion of exergy destruction in the complete process are identified and possibilities of improving them and the complete system in order to increase the overall efficiency are demonstrated. The combustion chamber necessary for heat supply is found to be the component with the highest proportion of exergy destruction of the complete plant. Moreover, the components of air preheater, reactor contribute significantly to the exergy destruction of the complete system.

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Methanol Reforming in Supercritical Water for Hydrogen Production

Cited by 37 publications

References 35 publications

Influence of Salts During Hydrothermal Biomass Gasification: The Role of the Catalysed Water-Gas Shift Reaction

Influence of Salts During Hydrothermal Biomass Gasification: The Role of the Catalysed Water-Gas Shift Reaction

Biomass‐derived hydrogen energy potential in Africa

Exergetic efficiency and options for improving sewage sludge gasification in supercritical water

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