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15 results on '"Hilpmann, Gerd"'

8. Experimental Evaluation of a New Approach for a Two-Stage Hydrothermal Biomass Liquefaction Process

Author

Klemm, Marco, primary, Kröger, Michael, additional, Görsch, Kati, additional, Lange, Rüdiger, additional, Hilpmann, Gerd, additional, Lali, Farzad, additional, Haase, Stefan, additional, Krusche, Michael, additional, Ullrich, Frank, additional, Chen, Zihao, additional, Wilde, Nicole, additional, Al-Naji, Majd, additional, and Gläser, Roger, additional

Published
2020
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13. Biotechnological hydrogen production by photosynthesis

Author

Weber, Jost, Krujatz, Felix, Hilpmann, Gerd, Grützner, Sara, Herrmann, Jana, Thierfelder, Simone, Bienert, Georg, Illing, Rico, Helbig, Karsten, Hurtado, Antonio, Gianaurelio, Cuniberti, Mertig, Michael, Lange, Rüdiger, Günther, Edeltraud, Opitz, Jörg, Lippmann, Wolfgang, Bley, Thomas, Haufe, Nora, and Publica

Subjects
genetic engineering, hydrogen purification, life cycle assessment, photobioreactor, lighting efficiency
Abstract

Microbiological photosynthesis is a promising tool for producing hydrogen in an ecologically friendly and economically efficient way. Certain microorganisms (e.g. algae and bacteria) can produce hydrogen using hydrogenase and/or nitrogenase enzymes. However, their natural capacity to produce hydrogen is relatively low. Thus, there is a need to optimize their core photosynthetic processes as well as their cultivation, for more efficient hydrogen production. This review aims to provide a holistic overview of the recent technological and research developments relating to photobiological hydrogen production and downstream processing. First we cover photobiological hydrogen synthesis within cells and the enzymes that catalyze the hydrogen production. This is followed by strategies for enhancing bacterial hydrogen production by genetic engineering, technological development, and innovation in bioreactor design. The remaining sections focus on hydrogen as a product, that is, quantification via (in-process) gas analysis, recent developments in gas separation technology. Finally, a discussion of the sociological (market) barriers to future hydrogen usage is provided as well as an overview of methods for life cycle assessment that can be used to calculate the environmental consequences of hydrogen production.

Published
2014

14. Mesure de la force de traînée sur un agrégat

Author

Gruy, Frédéric, Hilpmann, Gerd, Poyet, Jean-Pierre, Babick, Frank, Centre Sciences des Processus Industriels et Naturels (SPIN-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire des Procédés en Milieux Granulaires (LPMG-EMSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS), Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation (GENERIC-ENSMSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-SPIN, Institut für Verfahrenstechnik und Umwelttechnik (MVT), Technische Universität Dresden = Dresden University of Technology (TU Dresden), Nicolas Roche, Technische Universität Dresden, MVT Münchner Platz, 01187 D-Dresden, ANR-06-MAPR-0005,CIREM,Comportement des Inclusions dans les REacteurs Métallurgiques(2006), Toucas, Andrée-Aimée, and Programme Matériaux et Procédés - Comportement des Inclusions dans les REacteurs Métallurgiques - - CIREM2006 - ANR-06-MAPR-0005 - MAPR - VALID

Subjects
[SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering, mesure, agrégat, sphère, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, Traînée
Abstract

National audience; L'objectif est de mesurer la force de traînée sur un agrégat constitué d'un certain nombre de particules primaires. La plupart des mesures ont été réalisées jusqu'ici par sédimentation. Cette procédure pose un problème quant à la maîtrise de l'orientation de l'objet par rapport à un référentiel fixe. Nous proposons un nouveau montage, un mode opératoire et une analyse critique de la mesure. Ceux-ci ont été validés lors de l'étude d'une sphère.

Published
2009

15. Biotechnological hydrogen production by photosynthesis

Author

Weber, Jost, primary, Krujatz, Felix, additional, Hilpmann, Gerd, additional, Grützner, Sara, additional, Herrmann, Jana, additional, Thierfelder, Simone, additional, Bienert, Georg, additional, Illing, Rico, additional, Helbig, Karsten, additional, Hurtado, Antonio, additional, Cuniberti, Gianaurelio, additional, Mertig, Michael, additional, Lange, Rüdiger, additional, Günther, Edeltraud, additional, Opitz, Jörg, additional, Lippmann, Wolfgang, additional, Bley, Thomas, additional, and Haufe, Nora, additional

Published
2014
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