136 research outputs found
Silicon as an intermediary between renewable energy and hydrogen
No full textNon-renewable energy sources are becoming depleted. Air and water (our environment) are precious and will be under increased jeopardy without effective energy and environmental policies. A hydrogen technology based upon solar energy represents a viable solution to these problems. Silicon successfully functions as a tailor-made intermediate linking decentrally operating renewable energy-generation technology with equally decentrally organised hydrogen-based infrastructure at any location of choice. The transport and storage of silicon are free from potential hazards and/or high energy losses and require a simple infrastructure similar to that needed for coal. --
Silicon as an intermediary between renewable energy and hydrogen
No full textWeltweit nehmen Kohle-, Öl- und Erdgasvorräte ab, der Energiebedarf dagegen steigt dramatisch an. Regenerative Energien mindern zwar die steigenden Klimagefahren, können aber unseren zukünftigen Energiebedarf in Ballungszentren kaum decken. Nach Einschätzung zahlreicher Experten gehört dem Wasserstoff die Zukunft. Er wird aber derzeit nahezu ausschließlich aus fossilen Brennstoffen gewonnen; damit bleibt auch diese Ressource endlich - ganz zu schweigen von ihrem hohen Gefährdungspotenzial. - Das neuartige Energiekonzept einer solaren und damit kohlenstoffunabhängigen Wasserstoffwirtschaft bedarf zur technischen Realisierung eines Zwischenspeichers für regenerative Energien. Dieser zukünftige Energieträger sollte synthetisch einfach erzeugbar sein, in unbegrenztem Maß zur Verfügung stehen oder zumindest recycelbar sein, die Energie permanent speichern und gefahrlos transportierbar sein, eine hohe Energiedichte aufweisen und kein Kohlendioxid oder andere (Klima-) Schadstoffe freisetzen. - Das Element Silicium kann zu einem maßgeschneiderten Bindeglied zur Ankoppelung dezentraler regenerativer Energieerzeugung an eine ebenso dezentrale Wasserstoffwirtschaft an jedem beliebigen Ort werden. Der Transport und die Speicherung von Silicium sind - im Gegensatz zu Öl oder besonders zu Wasserstoff - ohne Gefährdungspotenzial und/oder hohe Energieverluste möglich und erfordern nur eine technische Infrastruktur, wie sie auch für Kohle benötigt wird.Global reserves of coal, oil and natural gas are diminishing; global energy requirements however are dramatically increasing. Renewable energy sources lower the threat to the earth’s climate but are not able to meet the energy consumption in major urban areas. The opinion of many experts is that the future will be dominated by hydrogen. However, this gas is essentially totally manufactured from fossil fuels and is hence of limited abundance – not to mention the hazards involved in its utilisation. - A novel energy concept involving solar and thus carbon-independent hydrogen-based technology necessitates an intermediate storage vehicle for renewable energy. This future energy carrier should be simple to manufacture, be available to an unlimited degree or at least be suitable for recycling, be able to store and transport the energy without hazards, demonstrate a high energy density and release no carbon dioxide or other climatically detrimental substances. - Silicon successfully functions as a tailor-made intermediate linking decentrally operating renewable energy-generation technology with equally decentrally organised hydrogen-based infrastructure at any location of choice. In contrast to oil and in particular hydrogen, the transport and storage of silicon are free from potential hazards and require a simple infrastructure similar to that needed for coal
Novel Naphthalene– and Cyclohexa-1,3-diene–Silene Cycloadducts
No full textAuner N, Seidenschwarz C, Herdtweck E, Sewald N. Novel Naphthalene– and Cyclohexa-1,3-diene–Silene Cycloadducts. Angewandte Chemie International Edition. 1991;30(4):444-446
Silaheterocycles. 14. Regiospecific Cycloaddition Reactions of Dichloroneopentylsilene with Cyclohexa-1,3-diene: A Novel 7-Silabicyclo[4.2.0]oct-2-ene → 2-Silabicyclo[2.2.2]oct-5-ene Rearrangement
No full textAuner N, Seidenschwarz C, Sewald N. Silaheterocycles. 14. Regiospecific Cycloaddition Reactions of Dichloroneopentylsilene with Cyclohexa-1,3-diene: A Novel 7-Silabicyclo[4.2.0]oct-2-ene &#8594 2-Silabicyclo[2.2.2]oct-5-ene Rearrangement. Organometallics. 1992;11(3):1137-1146
Silaheterocycles. 26. Facile Synthesis of Silicon Dichloro Substituted 3-Vinyl-1-silacyclobutanes from Silene/Butadiene [2+2] Cycloaddition Reactions: Model Compounds for Vinylsilacyclobutane -> Silacyclohexene Rearrangements
No full textZiche W, Wolff A, Auner N, Sewald N. Silaheterocycles. 26. Facile Synthesis of Silicon Dichloro Substituted 3-Vinyl-1-silacyclobutanes from Silene/Butadiene [2+2] Cycloaddition Reactions: Model Compounds for Vinylsilacyclobutane -> Silacyclohexene Rearrangements. Organometallics. 1993;12(10):4123-4134
Letter from J. G. Auner to Samuel Blanchard Howe - January 2, 1864
No full textA letter from J.G. Auner to the Rev. Samuel Blanchard How in which the author, Mr. Auner asked the Rev. to remember his son-in-law, Colonel Hofmann. The letter contains history of a Philadelphian Regiment under the command of Captain Hofmann, who was promoted to colonel after his commanding officer was injuried during the Battle of Falling Water(VA). In addition the regiment fought in the battles of South Mountain, Antietam, and Gettysburg. The Colonel first met Rev. How at a sermon given by the Rev. before the company before it left Philadelphia for war
Neue Naphtalin- und Cyclohexa-1,3-dien- Silen- Cycloaddukte
No full textAuner N, Seidenschwarz C, Herdtweck E, Sewald N. Neue Naphtalin- und Cyclohexa-1,3-dien- Silen- Cycloaddukte. Angewandte Chemie. 1991;103(4):425-426
Competing Reactions of Silenes: [2+2], [4+2], and [6+2] Cycloadditions with Cycloheptadiene and Cycloheptatriene
No full textZiche W, Seidenschwarz C, Auner N, Herdtweck E, Sewald N. Competing Reactions of Silenes: [2+2], [4+2], and [6+2] Cycloadditions with Cycloheptadiene and Cycloheptatriene. Angewandte Chemie International Edition. 1994;33(1):77-80
Konkurrierende Reaktionswege von Silaethenen: [2+2]-, [4+2]- und [6+2]-Cycloaddition mit Cycloheptadien und Cycloheptatrien
No full textZiche W, Seidenschwarz C, Auner N, Herdtweck E, Sewald N. Konkurrierende Reaktionswege von Silaethenen: [2+2]-, [4+2]- und [6+2]-Cycloaddition mit Cycloheptadien und Cycloheptatrien. Angewandte Chemie. 1994;106(1):93-96
1,3-Bis(2,6-diisopropyl-phen-yl)-1H-imidazol-3-ium bromide dichloromethane disolvate
No full textIn the title compound, C27H37N2 +·Br−·2CH2Cl2, both the cation and the anion are located on a crystallographic mirror plane. Both of the dichloromethane solvent molecules show a disorder across a mirror plane over two equally occupied positions. In the crystal, the cations are connnected to the bromide ions via C—H[cdots, three dots, centered]Br hydrogen bonds
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