Blar i NTNU Open på forfatter "Surup, Gerrit Ralf"
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Charcoal as an Alternative Reductant in Ferroalloy Production: A Review
Surup, Gerrit Ralf; Trubetskaya, Anna; Tangstad, Merete (Peer reviewed; Journal article, 2020)This paper provides a fundamental and critical review of biomass application as renewable reductant in integrated ferroalloy reduction process. The basis for the review is based on the current process and product quality ... -
Densification of Biocarbon and Its Effect on CO2 Reactivity
Kaffash, Hamideh; Tangstad, Merete; Surup, Gerrit Ralf (Peer reviewed; Journal article, 2021)Charcoal is an interesting reducing agent because it is produced from biomass which is renewable and does not contribute to global warming, provided that there is a balance between the felling of timber and growth of trees. ... -
Electrical Resistivity of Carbonaceous Bed Material at High Temperature
Surup, Gerrit Ralf; Pedersen, Tommy Andre; Chaldien, Annah; Beukes, Johan Paul; Tangstad, Merete (Peer reviewed; Journal article, 2020)This study reports the effect of high-temperature treatment on the electrical properties of charcoal, coal, and coke. The electrical resistivity of industrial charcoal samples used as a reducing agent in electric arc ... -
Hydrothermal carbonization of olive wastes to produce renewable, binder-free pellets for use as metallurgical reducing agents
Surup, Gerrit Ralf; Leahy, James J.; Timko, Michael T.; Trubetskaya, Anna (Journal article, 2020)Torrefaction or hydrothermal carbonization processes were compared for conversion of olive pulp into metallurgical reducing agent. The dependence of yield, CO2 reactivity, and mechanical properties to reaction time and ... -
Life cycle assessment of renewable reductants in the ferromanganese alloy production: A review
Surup, Gerrit Ralf; Trubetskaya, Anna; Tangstad, Merete (Peer reviewed; Journal article, 2021)This study examined the literature on life cycle assessment on the ferromanganese alloy production route. The environmental impacts of raw material acquisition through the production of carbon reductants to the production ... -
Life Cycle Assessment of Renewable Reductants in the Ferromanganese Alloy Production: A Review
Surup, Gerrit Ralf; Trubetskaya, Anna; Tangstad, Merete (Peer reviewed; Journal article, 2021)This study examined the literature on life cycle assessment on the ferromanganese alloy production route. The environmental impacts of raw material acquisition through the production of carbon reductants to the production ... -
Life Cycle Based Climate Emissions of Charcoal Conditioning Routes for the Use in the Ferro-Alloy Production
Surup, Gerrit Ralf; Kaffash, Hamideh; Ma, Yan; Trubetskaya, Anna; Pettersen, Johan Berg; Tangstad, Merete (Peer reviewed; Journal article, 2022)Renewable reductants are intended to significantly reduce CO2 emissions from ferro-alloy production, e.g., by up to 80% in 2050 in Norway. However, charcoals provide inferior properties compared to fossil fuel-based ... -
Supercritical extraction and microwave activation of wood wastes for enhanced syngas production and generation of fullerene-like soot particles
Trubetskaya, Anna; Hunt, Andrew J.; Budarin, Vitaliy L.; Attard, Thomas M.; Kling, Jens; Surup, Gerrit Ralf; Arshadi, Mehrdad; Umeki, Kentaro (Peer reviewed; Journal article, 2020)This work demonstrated that supercritical carbon dioxide extraction is effective as a pre-treatment technology to generate soot particles with the fullerene-like structure and increase syngas yield from extracted residues ...