Label: hydrogen

All content with label hydrogen.
Related Labels: bioenergy, climate-changes, energy-consumption, enzymes, bacteria, biophotolysis, acetogenesis, acetate, figure, hyvolution, process-optimization, time-frame, introduction, oil-industry, oxidation, solar-energy, greenhouse-gases, biological-process, development, more »

Page: Acetogenesis (REBEL WP7: Bioenergy)
Acetogenesis the carbonic acids are converted to acetate, H{}2 and CO{}2. Just these substances can be changed directly into methane by methanogenic bacteria. This process is also called "anaerobic oxidation", because electrons in the form of H{}2 are released. The releasing of butyric ...
Other labels: biogas, biogas-production, bioenergy, carbon-dioxide, acetate, methane, energy-gain, anaerobic-oxidation
Page: Acidification (REBEL WP7: Bioenergy)
fragments of the hydrolysis are metabolized by facultative and fastidious anaerobes to carboxylic acids like acetic acid, propionic acid, butyric acid, valeric acid and hexane acid. In addition, they are metabolized to alcohol, hydrogen (H{}2) and carbon dioxide (CO{}2). There is a poor ...
Other labels: biogas, oxidation, development, biogas-production, bioenergy, acidification, narrative-text
Page: Biochemistry of Dark-Fermentation (REBEL WP7: Bioenergy)
Enzymes, necessary for hydrogen production  Hydrogen production has the simplest chemical reaction, catalyzed by enzymes. During this reaction, a reversible reduction of protons to molecular hydrogen occurs (compare reaction equation of molecular hydrogen production).  !hydrogen production.JPG! The necessary ...
Other labels: dark-fermentation, enzymes, hydrogen-production, bioenergy, biochemistry, figure, narrative-text
Page: Hydrogen from Biological Processes (REBEL WP7: Bioenergy)
Introduction In spite of increased utilization of energysaving technologies, the global energy consumption will rise dramatically in the next few years. Particularly, rapid industrialization of developing and threshold countries, as well as increasing global human population contribute to excess energy consumption. Fossil ...
Other labels: hyvolution, sources-of-energy, fermentation, fossil-fuels, bioenergy, biological-process, energy-consumption, figure
Page: Hydrogen-producing microorganisms (REBEL WP7: Bioenergy)
Several bacteria from different genera are able to produce hydrogen. Major group constitute stringent anaerobic microorganisms, such as clostridia, paunch bacteria or hyperthermophilic archae bacteria. Additionally, facultative anaerobe, e.g. enterobacter, e.coli or citrobacter can produce hydrogen ...
Other labels: bacteria, hydrogen-production, microorganisms, bioenergy, figure, narrative-text
Page: Methanogenesis (REBEL WP7: Bioenergy)
last but most important step of generating biogas. Methane can be metabolized out of acetic acid (CH{}3{}COOH), H{}2 and CO{}2, methanol of methylene (CH{}3{}NH{}3). Responsible microorganisms are methanogenic bacteria. They are strictly ...
Other labels: biogas, development, biogas-production, microorganisms, bioenergy, methanogenic-bacteria, substrate, methane
Page: Methods of process optimization (REBEL WP7: Bioenergy)
several approaches for optimization of thermophilic dark fermentation: Substrate Promising substrates contain carbohydrates and should be achieved from sustainable sources. They should enclose enough energy for enabling fermentative conversion to hydrogen. Additionally, substrates should not require any pretreatment ...
Other labels: dark-fermentation, hydrogen-production, microorganisms, bioenergy, process-optimization, narrative-text
Page: Peak Oil and the Energy Crunch (REBEL WP2: Ethical and scientific foundation)
we don't change our course, we'll end up where we are headed. Chinese saying As bad news continues to pour in from climate scientists, petroleum geologists, and economists, there is a growing realization that the decisions we make in the next few ...
Other labels: impacts, ethics-of-care, energy-depletion, sources-of-energy, oil, climate-changes, fossil-fuels, energy
Page: Process of biological hydrogen production (REBEL WP7: Bioenergy)
Biological processes of hydrogen production have significant advantages compared to conventional thermal processes. Firstly, they are partly more sustainable, as they use renewable energy sources for production of hydrogen. Secondly, they are less energyintensive, because most processes are conducted at moderate temperatures ...
Other labels: bacteria, dark-fermentation, biophotolysis, photo-fermentation, hydrogen-production, bioenergy, cyanobacteria, narrative-text