On the Adequacy of API 521 Relief-Valve Sizing Method for Gas-Filled Pressure Vessels Exposed to Fire

Autor: Anders Andreasen, Filippo Borroni, Marcos Zan Nieto, Carsten Stegelmann, Rudi P. Nielsen

Publikováno v: Safety, Vol 4, Iss 1, p 11 (2018)

In this paper, the adequacy of the legacy API 521 guidance on pressure relief valve (PRV) sizing for gas-filled vessels subjected to external fire is investigated. Multiple studies show that in many cases, the installation of a PRV offers little or n

Externí odkaz: https://doaj.org/article/a7102919076d4482b600c979ad690429

Supercritical carbon dioxide fractionation of bio-crude produced by hydrothermal liquefaction of pinewood

Autor: Thomas Helmer Pedersen, Rudi P. Nielsen, Nikolaos Montesantos, Marco Maschietti, Lasse Rosendahl

Publikováno v: Montesantos, N, Pedersen, T H, Nielsen, R P, Rosendahl, L & Maschietti, M 2019, ' Supercritical carbon dioxide fractionation of bio-crude produced by hydrothermal liquefaction of pinewood ', Journal of Supercritical Fluids, vol. 149, pp. 97-109 . https://doi.org/10.1016/j.supflu.2019.04.001

The supercritical carbon dioxide extraction of bio-crude, produced by hydrothermal liquefaction of lignocellulosic biomass, was investigated for pressures and temperatures in the range 112–400 bar and 40–120 °C, corresponding to solvent densitie

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61c24a146a9079020830e79f28c880cb
https://doi.org/10.1016/j.supflu.2019.04.001

Towards understanding kraft lignin depolymerisation under hydrothermal conditions

Autor: Merima Hasani, Rudi P. Nielsen, Hans Theliander, Anders Ahlbom, Marco Maschietti

Publikováno v: Ahlbom, A, Maschietti, M, Nielsen, R, Hasani, M & Theliander, H 2021, ' Towards understanding kraft lignin depolymerisation under hydrothermal conditions ', Holzforschung, vol. 76, no. 1, pp. 37-48 . https://doi.org/10.1515/hf-2021-0121

Kraft lignin depolymerisation using hydrothermal liquefaction suffers from the formation of char, resulting in a decreased product yield as well as causing operational problems. While this may be mitigated by the addition of capping agents such as ph

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ec7508ec85d5bacabde526bb07bf0dc
https://vbn.aau.dk/da/publications/4447ff29-51f7-4b8e-b7f5-36c5d427a2ab

Characterization of the Liquid Products from Hydrolyzed Epoxy and Polyester Resin Composites Using Solid-Phase Microextraction and Recovery of the Monomer Phthalic Acid

Autor: Erik Gydesen Søgaard, Niels H. Pedersen, Jens Henriksen, Hülya U. Sokoli, Morten Enggrob Simonsen, Rudi P. Nielsen, Marianne L. Madsen

Publikováno v: Ucar, H, Simonsen, M E, Nielsen, R P, Henriksen, J, Madsen, M, Pedersen, N & Søgaard, E G 2016, ' Characterization of the Liquid Products from Hydrolyzed Epoxy and Polyester Resin Composites Using Solid-Phase Microextraction and Recovery of the Monomer Phthalic Acid ', Industrial & Engineering Chemistry Research, vol. 55, no. 34, pp. 9118-9128 . https://doi.org/10.1021/acs.iecr.6b02111

A method to recover the fibers and monomers from epoxy-based and unsaturated polyester-based composites and characterize the liquid products using solid-phase microextraction has been investigated in this study. Experiments were performed using near-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa8bdf21bac0069597357feeaf085d59
https://doi.org/10.1021/acs.iecr.6b02111

Revealing hidden debottlenecking potential in flare systems on offshore facilities using dynamic simulations – A preliminary investigation

Autor: Ana Xiao Outomuro Somozas, Marco Maschietti, Rudi P. Nielsen, Anders Andreasen

Publikováno v: Somozas, A X O, Nielsen, R P, Maschietti, M & Andreasen, A 2020, ' Revealing hidden debottlenecking potential in flare systems on offshore facilities using dynamic simulations – A preliminary investigation ', Journal of Loss Prevention in the Process Industries, vol. 67, 104211 . https://doi.org/10.1016/j.jlp.2020.104211

Three flare systems are modeled and total plant depressurization is investigated using dynamic simulations in order to access the debottlenecking potential. Usually steady-state simulation of the flare network is used for sizing and rating of the fla

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a44034db4eed2b7591ede7541aa572d9
https://doi.org/10.1016/j.jlp.2020.104211