API src

Found 4056 results.

Related terms

Potentialgebiete zur Speicherung von Wasserstoff in Schleswig-Holstein

Dargestellt ist die Verbreitung von untersuchungswürdigen Salinar-Gesteinen innerhalb der Salzstockumgrenzung zur Anlage von Wasserstoff-/Erdgas-Speicherkavernen und die maximal vertretbare Tiefe des Salzstockdaches. Die Salzstöcke sind aufgrund ihrer strukturellen Entwicklung intern komplex - aus den Salzgesteinen des Zechstein und des Rotliegend - als Doppelsalinare aufgebaut und weisen in ihren Flankenbereichen Überhänge auf. Zur Abgrenzung von untersuchungswürdigen Horizonten zur Speicherung von Wasserstoff bzw. Erdgas diente im Wesentlichen die Tiefenlage des Salzstockdaches (Top der Zechstein und Rotliegend-Ablagerungen) bis 1300 m u. NHN als maximal für die Aussolung von Kavernen vertretbare Tiefe (derzeitiger Kenntnisstand). Aus Bohrergebnissen lässt sich ableiten, dass lokal aufgrund der Ausbildung von mächtigen Hutgesteinen das solfähige Gestein auch innerhalb der ausgewiesenen Bereiche tiefer als 1300 m unter NHN liegen kann. Eine Nutzung der Flankenbereiche wird aufgrund der zu erwartenden, unterschiedlich ausgebildeten Überhänge nicht möglich sein.

Plant wax composition of sediment core ROT21 from the Rotsee, Switzerland

This dataset contains compound-specific hydrogen (δ2H) and carbon (δ13C) isotope compositions and concentrations of long-chain n-alkanes and fatty acids (n-alkanoic acids) from the ROT21 sediment record of Rotsee, Central Switzerland (47°04′10″N, 8°18′48″E, 419 m a.s.l.). Sediment cores were retrieved in October 2021 using a UWITEC gravity corer, and the dataset spans the past ~13,000 years based on 19 radiocarbon dates (terrestrial and aquatic macrofossils) integrated with 210Pb and 137Cs profiles (see De Jonge et al., 2025). Laboratory analyses were conducted between February 2023 and November 2024 at the University of Basel. Sediment samples (~2–5 g) were sub-sampled, freeze-dried, spiked with internal standards (n-C19-alkanoic acid, n-C36-alkane, 2-octadecanone, and n-C21-alkanol), and extracted with dichloromethane/methanol (9:1, v/v) using an Accelerated Solvent Extractor (Dionex ASE 350, Thermo Fisher Scientific). Following saponification, neutral fractions were separated via silica gel chromatography, and fatty acids were converted to fatty acid methyl esters (FAMEs). Both n-alkanes and FAMEs were further purified to isolate saturated compounds using AgNO3-impregnated silica gel columns, then analyzed and quantified by gas chromatography with flame ionization detection (GC-FID). Peak areas were normalized to recovery standards to account for potential losses during sample handling, and compounds were identified by comparison with external standards. Compound-specific δ2H and δ13C values were determined by gas chromatography-isotope ratio mass spectrometry (GC-IRMS) and normalized to the VSMOW-SLAP (δ2H) and VPDB (δ13C) scales. Analytical precision was ±3-5 ‰ for δ2H and ±0.2–0.3 ‰ for δ13C. The dataset was generated to reconstruct past hydroclimate and vegetation dynamics in Central Europe using plant wax δ2H records. Full methodological details are provided in the study: Central Europe hydroclimate since the Younger Dryas inferred from vegetation-corrected sedimentary plant wax δ2H values (Santos et al., 2026).

Organic parameters obtained from Röttingen core

The total carbon (TC), total organic carbon (TOC), and total sulfur (TS) were determined using a LECO CS-230 system (Laboratory Equipment Corporation). Samples were heated up to 2000 °C under an oxygen atmosphere and an infrared detector subsequently measured the amount of produced CO₂ and SO₂. TOC was measured the same way after removing inorganic carbonates using 10 % HCl solution at 80 °C. Rock-Eval Pyrolyses were performed on a Rock-Eval-6 analyser (Vinci Technologies) using up to 180 mg initial sample material and a standard program (Espitalié et al., 1977; Lafargue et al., 1998), starting isothermal with 300°C for 3 min, succeeded by a heating rate of 25°C/min up to 650°C. Standard deviations for hydrogen indices (HI) and Tmax values are ± 5 % and ± 2°C, respectively.

Organic parameters obtained from Metzingen core

The total carbon (TC), total organic carbon (TOC), and total sulfur (TS) were determined using a LECO CS-230 system (Laboratory Equipment Corporation). Samples were heated up to 2000 °C under an oxygen atmosphere and an infrared detector subsequently measured the amount of produced CO₂ and SO₂. TOC was measured the same way after removing inorganic carbonates using 10 % HCl solution at 80 °C. Rock-Eval Pyrolyses were performed on a Rock-Eval-6 analyser (Vinci Technologies) using up to 180 mg initial sample material and a standard program (Espitalié et al., 1977; Lafargue et al., 1998), starting isothermal with 300°C for 3 min, succeeded by a heating rate of 25°C/min up to 650°C. Standard deviations for hydrogen indices (HI) and Tmax values are ± 5 % and ± 2°C, respectively.

Whole rock mineralogy and organic parameters of Opalinus Clay: insights from sediment cores from the Swabian Alb (southern Germany)

The Middle Jurassic Opalinus Clay (OPA) in Switzerland and southern Germany is regarded as a potential host rock for the disposal of high-level radioactive waste. This study investigates sediment samples from drill cores taken from the Swabian Alb region (southern Germany) and employs a facies-based approach combined with mineralogical analyses, measurements of cation exchange capacity (CEC), LECO C/S analyses, and Rock-Eval pyrolysis. Results are based on analyses of two fully cored scientific drillings conducted by the Federal Institute for Geosciences and Natural Resources (BGR) in the framework of the research project "SEPIA" in the Swabian Alb in Baden-Württemberg, southern Germany. The drill sites are located in the vicinity of the villages Metzingen (48.51149° N, 9.26464° E) and Röttingen (48.89905° N, 10.29520° E). At the drilling sites, the OPA is between approx. 100 m – 150 m thick and overlain by 50 m – 70 m of overburden. In Germany, the OPA can be lithostratigraphically divided into two subunits: the Teufelsloch member and the overlying Zillhausen member. This division is based on a combined lithological and stratigraphic framework (Dietze et al., 2021). Regarding lithofacies, the OPA in Switzerland and southern Germany can be broadly divided into several distinct units ("facies associations" according to Zimmerli et al., 2024). For Germany, the following three lithological facies associations (FA) were identified based on a subfacies approach: (1) a lower part that is rich in clay (FA-1), (2) a middle part that is silty (FA-2) and (3) an upper part that is silty and interbedded with calcareous(-sandy) beds (FA-3). XRD patterns of whole rock material were recorded using a PANalytical X'Pert PRO MPD θ - θ diffractometer (Co-Kα radiation generated at 40 kV and 40 mA). The samples were investigated from 3° to 80° 2 θ with a step size of 0.03° 2 θ and a measuring time of 3 sec per step. Quantitative Rietveld refinements of the experimental XRD data were conducted using the software Profex/BGMN (Döbelin & Kleeberg, 2015; Bergmann et al., 1998). Determination of cation exchange capacity (CEC) was carried out using always two different samples masses (typically 400 and 600 mg) according to the method of Meier and Kahr (1999), based on a Cu(II)triethylentetramine complex ("Cu-trien method") and measurement using VIS spectroscopy. According to Dohrmann et al. (2012), the analytical error as determined for high-CEC bentonites is generally smaller than ±3.9 cmol(+)kg⁻¹. The total carbon (TC), total organic carbon (TOC), and total sulfur (TS) were determined using a LECO CS-230 system (Laboratory Equipment Corporation). Samples were heated up to 2000 °C under an oxygen atmosphere and an infrared detector subsequently measured the amount of produced CO₂ and SO₂. TOC was measured the same way after removing inorganic carbonates using 10 % HCl solution at 80 °C. Rock-Eval Pyrolyses were performed on a Rock-Eval-6 analyser (Vinci Technologies) using up to 180 mg initial sample material and a standard program (Espitalié et al., 1977; Lafargue et al., 1998), starting isothermal with 300°C for 3 min, succeeded by a heating rate of 25°C/min up to 650°C. Standard deviations for hydrogen indices (HI) and Tmax values are ± 5 % and ± 2°C, respectively. The findings of this study underscore the importance of integrating lithofacies studies with mineralogical investigations to effectively assess the variability and comparability of clay-rich host rocks suitable for radioactive waste disposal.

Alkane abundance and stable isotope measurements from ELSA stack lake sediments, Eifel Volcanic Field, Germany

n-alkane peak areas from GC-FID measurements. Compound specific hydrogen and carbon isotope measurements made using GC-IRMS. Samples taken from Auel Maar, Holzmaar, and Schalkenmehrener maar lake sediment cores spanning 60,000 years. Age model information and additional proxy data from the ELSA-20 stack are found in Sirocko et al., 2021 (Nature Geoscience) and Sirocko et al., 2022 (Scientific Reports). Full methodological details are found in Zander et al., 2025 (Rapid Communications in Mass Spectrometry).

Erweiterung der Chlor-Anlage durch Errichtung und Betrieb einer HCL-Direktsynthese am Standort Schkopau

Die Dow Olefinverbund GmbH betreibt am Standort Schkopau eine Elektrolyseanlage zur Herstellung von Chlor, Natronlauge und Wasserstoff – im weiteren Verlauf als Chlor-Anlage bezeichnet. Es ist die Errichtung einer zusätzliche Betriebseinheit (BE) 18 zur Herstellung von Salzsäure geplant.

Dissolved organic carbon and solid-phase extracted DOC, and Fourier Transform Ion Cyclotron Resonance Mass Spectrometry results for bottom water and porewater samples collected from the German Bight, during RV Heincke cruises HE582 and HE595

This dataset presents detailed information on the sampling sites, dissolved organic carbon (DOC) concentrations, and molecular characteristics of solid-phase extracted DOC (SPE-DOC) from bottom water (BW) and porewater (PW) samples collected in the German Bight, North Sea, during RV Heincke cruises HE582 and HE595. The data include average elemental compositions (C, H, O, N, S, P) and relative abundances of major compound classes and structural groups derived from FT-ICR-MS analysis. These molecular-level results provide insights into compositional differences between BW and PW DOM and reveal the selective preservation and transformation processes governing organic matter across the sediment–water interface.

lAW - industrielle Abwärme - Errichtung und Betrieb einer Wasserstofftrasse von Leuna nach Kulkwitz, Abschnitt Sachsen, Stadt Markranstädt, Gemarkungen Quesitz, Thronitz Flur 3, Thronitz Flur 4 und Kulkwitz.

Die Vorhabenträgerin plant die Neuerrichtung einer Wasserstofftrasse. Die geplante Wasserstoffleitung mit einer Gesamtlänge von ca. 19 km führt durch die Bundesländer Sachsen (5 km) und Sachsen-Anhalt (14 km). Dieses Planfeststellungsverfahren betrifft den durch Sachsen verlaufenden Abschnitt. Im Abschnitt Sachsen ist die Verlegung einer Rohrleitung von der Landesgrenze Sachsen-Anhalt bis nach Kulkwitz mit einer Leitungsdimension von DN 400 und einem Auslegungsdruck von 63 bar inkl. aller betriebsnotwendigen technischen Einrichtungen geplant. Mit dem Vorhaben wird die Verbindung zwischen dem Heizwerk Kulkwitz und Wasserstoffinfrastrukturen in Leuna möglich

Linde Gas Produktionsgesellschaft mbH & Co.KG – Wesentliche Änderung einer Anlage zur Herstellung von Wasserstoff durch Elektrolyse von Wasser am Standort Leuna

Die Linde Gas Produktionsgesellschaft mbH & Co. KG möchte die bestehende Anlage zur Herstellung von Wasserstoff durch Errichtung und Betrieb einer weiteren Elektrolyseeinheit („Druck-Alkali-Elektrolyse) ändern. Zum geplanten Erweiterungsumfang gehören im Wesentlichen Prozessanlagen, sowie Neben- und Hilfsanlagen. Der Erweiterungsumfang soll aus 13 Betriebseinheiten bestehen. Die neue Elektrolyseeinheit soll innerhalb des Chemiestandortes der InfraLeuna GmbH südlich angrenzend an die Bestandsanlage errichtet und betrieben werden. In der Elektrolyseanlage sollen künftig bei einer Betriebszeit von ca. 8.760 Stunden pro Jahr 42,1 Mio Nm³/a (Bestand) + 8,76 Mio Nm³/a (neu) Wasserstoff hergestellt werden. Die Herstellung von Wasserstoff erfolgt im kontinuierlichen Prozess. Der Kernprozess ist die Elektrolyse von Wasser in Sauerstoff und Wasser. Vorher und im Nachhinein erfolgen Reinigungsschritte, um eine gleichbleibende Qualität des Endproduktes Wasserstoff zu gewährleisten. Als Abgas fällt während des gesamten Prozesses ausschließlich Sauerstoff und Wasserstoff an, welche direkt an die Umgebung abgegeben werden. Im Falle einer Entlüftung von einzelnen Anlagenteilen kann es ebenfalls zum Austritt kleiner Mengen Wasserstoff in die Umgebung kommen. Die neue Elektrolyseeinheit wird in die vorhandene Versorgungsperipherie wie z.B. Rohrbrücken, Fahrwege, der Bestandsanlage eingebunden. Der Betrieb soll von Montag bis Sonntag im Schichtbetrieb rund um die Uhr erfolgen. Die Steuerung und Überwachung der Anlage erfolgt, wie bei der Bestandsanlage, über das Remote Operation Centers.

1 2 3 4 5 … 404 405 406