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Your search keyword '"Sermyagina, Ekaterina"' showing total 37 results
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37 results on '"Sermyagina, Ekaterina"'

18. Recovery boiler back-end heat recovery

Author

SAARI, JUSSI, primary, KAIKKO, JUHA, additional, SERMYAGINA, EKATERINA, additional, HAMAGUCHI, MARCELO, additional, CARDOSO, MARCELO, additional, VAKKILAINEN, ESA, additional, and HAIDER, MARKUS, additional

Published
2023
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25. Characterization of Biochars by Thermal Analysis Mass Spectrometry – Feed Analysis, Product Description, and Reaction Monitoring

Author

Friederici, Lukas, primary, Meščeriakovė, Sara-Maaria, additional, Neumann, Anika, additional, Sermyagina, Ekaterina, additional, Meščeriakovas, Arūnas, additional, Lähde, Ann, additional, Grimmer, Christoph, additional, Streibel, Thorsten, additional, Rüger, Christopher, additional, and Zimmermann, Ralf, additional

Published
2022
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33. Pre-treatment of coniferous biomass via hydrothermal carbonization and torrefaction: mass and energy yields

Author

Sermyagina, Ekaterina, Saari, Jussi, Vakkilainen, Esa, Lappeenrannan teknillinen yliopisto, Lappeenranta University of Technology, and fi=School of Energy Systems|en=School of Energy Systems

Subjects
energy densification, biomass, pre-treatment
Abstract

Fuel properties of woody biomass could be significantly improved with several pre-treatment technologies. This paper presents the results of experimental comparison of hydrothermal carbonization and torrefaction processes for coniferous wood chips. Hydrothermal carbonization was performed within the typical reaction temperatures 180 – 250 °C during six hours. In torrefaction tests, the biomass was kept in an inert atmosphere for 30 minutes at temperatures 240 - 300 °C. Mass and energy yields of pre-treated biomass were calculated for all experimental sets. Within the limits of selected operation parameters, HTC demonstrated more intensive decomposition of feedstock comparing to torrefaction, and with higher mass losses resulted in lower values of energy yields than in case of torrefaction. Post-print / Final draft

Published
2015

35. DESIGNING A SEQUENTIAL-MODULAR STEADY-STATE SIMULATOR FOR KRAFT RECOVERY CYCLE EVAPORATIVE SYSTEMS.

Author

Vianna Neto, Márcio R., Cardoso, Marcelo, Sermyagina, Ekaterina, Vakkilainen, Esa K., and Oliveira, Eder D.

Subjects
SULFATE waste liquor, PAPER industry, EVAPORATORS, MATHEMATICAL optimization, C++
Abstract

A sequential-modular process simulator was developed for simulating Kraft recovery cycle evaporation plants under steadystate conditions. The simulation engine was written in C++ and has been made freely available to the scientific and technical communities. The engine included subroutines for ordering, partitioning, and tearing flowsheets, as well as for converging torn flowsheet streams. In this paper, these core subroutines are described. Evaporator calculations are based on steam table correlations and black liquor enthalpy correlations described in literature. The numerical method used for converging torn streams in this implementation was the well-known Wegstein Method. Five multiple-effect counter-current evaporator scenarios, ranging from 3 to 7 effects, were used to profile the simulator. The simulator was shown to be robust enough to be used for simulating evaporator arrangements that are typically found in the pulp and paper industry. The robustness of convergence found in the tested scenarios suggests that the simulator could be extended to accommodate more complex systems. The simulator converged quickly to all solutions, suggesting that it may be used for performing optimization of evaporative systems. [ABSTRACT FROM AUTHOR]

Published
2022

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