Search Results - "Hupa, M."

Catalytic pyrolysis of woody biomass in a fluidized bed reactor: Influence of the zeolite structure by Aho, A., Kumar, N., Eränen, K., Salmi, T., Hupa, M., Murzin, D. Yu

“…Catalytic pyrolysis of biomass from pine wood was carried out in a fluidized bed reactor at 450 °C. Different structures of acidic zeolite catalysts were used…”
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Catalytic effect of Ca and K on CO2 gasification of spruce wood char by Perander, M., DeMartini, N., Brink, A., Kramb, J., Karlström, O., Hemming, J., Moilanen, A., Konttinen, J., Hupa, M.

“…•Ca and K were loaded to an acid washed wood sample by ion-exchange.•CO2-gasification reactivity was studied using TGA at 850°C.•The reaction rate increased…”
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Dissolution patterns of biocompatible glasses in 2-amino-2-hydroxymethyl-propane-1,3-diol (Tris) buffer by Fagerlund, S., Hupa, L., Hupa, M.

“…A continuous flow measurement system with sensitive on-line ion analysis has been applied to study the initial dissolution behaviour of biocompatible glasses…”
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CO2 gasification rates of char particles from torrefied pine shell, olive stones and straw by Karlström, Oskar, Costa, M., Brink, A., Hupa, M.

“…•Biomass char gasification rates could be predicted with unified activation energies.•Torrefaction of biomass either increases of decreases the reactivity of…”
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Influence of the partial substitution of CaO with MgO on the thermal properties and in vitro reactivity of the bioactive glass S53P4 by Massera, J., Hupa, L., Hupa, M.

“…The influence of up to 4mol% substitution of MgO for CaO on the properties of the bioactive glass S53P4 was studied. Thermal analysis, hot stage microscopy and…”
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Trace element behavior in the fluidized bed gasification of solid recovered fuels – A thermodynamic study by Konttinen, Jukka, Backman, Rainer, Hupa, M., Moilanen, Antero, Kurkela, Esa

“…► A thermodynamic database on trace elements, combining data from several databases. ► Stepwise introduction of fuel ash components to eliminate unrealistic…”
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High temperature corrosion of superheater steels by KCl and K2CO3 under dry and wet conditions by Lehmusto, J., Yrjas, P., Skrifvars, B.-J., Hupa, M.

“…The influence of both solid KCl and solid K2CO3 on the oxidation behavior of a ferritic 10CrMo type steel and a nickel-based Alloy 625 type steel was…”
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Comparison of potassium chloride and potassium carbonate with respect to their tendency to cause high temperature corrosion of stainless 304L steel by Lehmusto, J., Skrifvars, B.-J., Yrjas, P., Hupa, M.

“…The influence of both solid KCl as well as K2CO3 on the oxidation of the 304L steel has been investigated in the laboratory. Three temperatures were used;…”
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Catalytic upgrading of woody biomass derived pyrolysis vapours over iron modified zeolites in a dual-fluidized bed reactor by Aho, A., Kumar, N., Lashkul, A.V., Eränen, K., Ziolek, M., Decyk, P., Salmi, T., Holmbom, B., Hupa, M., Murzin, D. Yu

“…In this paper, the influence of the proton forms of beta, Y and ferrierite zeolites and their iron modified counterparts during upgrading of pine wood…”
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Thermogravimetric studies of high temperature reactions between potassium salts and chromium by Lehmusto, J., Lindberg, D., Yrjas, P., Skrifvars, B.-J., Hupa, M.

“…► K2CO3 reacted with Cr2O3 forming K2CrO4. ► Presence of chlorine did not alone explain the initiation of accelerated oxidation. ► More light was shed to the…”
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Reduction of superheater corrosion by co-firing risky biomass with sewage sludge by Aho, M., Yrjas, P., Taipale, R., Hupa, M., Silvennoinen, J.

“…Iron and aluminium sulphates are added to processes producing sewage sludge (SWS), and SWS also contains aluminium silicates. These compounds can destroy…”
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Phase composition and in vitro bioactivity of porous implants made of bioactive glass S53P4 by Fagerlund, S., Massera, J., Moritz, N., Hupa, L., Hupa, M.

“…This work studied the influence of sintering temperature on the phase composition, compression strength and in vitro properties of implants made of bioactive…”
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Pyrolysis of pine and gasification of pine chars – Influence of organically bound metals by Aho, A., DeMartini, N., Pranovich, A., Krogell, J., Kumar, N., Eränen, K., Holmbom, B., Salmi, T., Hupa, M., Murzin, D.Yu

“…► Selective leaching of ash-forming elements from biomass. ► Adsorption of alkali and alkaline earth metals to the leached biomass sample. ► Pyrolysis of the…”
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MAS-NMR support for Hench model in the case of bioactive glass microspheres by Simon, S., Cacaina, D., Vasilescu, M., Ylänen, H., Hupa, M.

“…The structural changes occurred in bioactive glass microspheres belonging to the system SiO 2 –Na 2 O–P 2 O 5 –CaO–K 2 O–MgO incorporating yttrium were…”
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Thermal properties and surface reactivity in simulated body fluid of new strontium ion-containing phosphate glasses by Massera, J., Petit, L., Cardinal, T., Videau, J. J., Hupa, M., Hupa, L.

“…In this paper, we investigate the effect of SrO substitution for CaO in 50P 2 O 5 –10Na 2 –(40−x)CaO–xSrO glass system (x from 0 to 40) on the thermal and…”
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Corrosion of superheater steel materials under alkali salt deposits Part 1: The effect of salt deposit composition and temperature by Skrifvars, B.-J., Backman, R., Hupa, M., Salmenoja, K., Vakkilainen, E.

“…This paper is the first in a series of two reporting on results from an extensive laboratory-scale corrosion study where tailor-made well-characterized…”
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High temperature corrosion of boiler waterwalls induced by chlorides and bromides. Part 1: Occurrence of the corrosive ash forming elements in a fluidised bed boiler co-firing solid recovered fuel by Vainikka, P., Bankiewicz, D., Frantsi, A., Silvennoinen, J., Hannula, J., Yrjas, P., Hupa, M.

“…In waste fired boilers high temperature corrosion has often been attributed to zinc and lead chlorides. In addition, bromine induced high temperature corrosion…”
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Control of the thermal properties of slow bioresorbable glasses by boron addition by Massera, J., Claireaux, C., Lehtonen, T., Tuominen, J., Hupa, L., Hupa, M.

“…This work studied the properties of glasses with the molar composition 63.8SiO 2-(11.6-x)Na 2O-(0.7 + x)B 2O 3-19.2CaO-3MgO-1.5Al 2O 3-0.2P 2O 5, in which x =…”
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High temperature oxidation of metallic chromium exposed to eight different metal chlorides by Lehmusto, J., Skrifvars, B.-J., Yrjas, P., Hupa, M.

“…► The corrosion behavior of chromium with eight chlorides was studied in detail. ► Presence of chlorine did not alone explain the initiation of accelerated…”
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Evaluation of the condensation behavior of lead and zinc in BFB combustion of recovered waste wood by Enestam, S., Backman, R., Mäkelä, K., Hupa, M.

“…The chemistry of lead and zinc in the bubbling fluidized bed combustion of recovered waste wood (RWW) was studied based on advanced thermodynamic equilibrium…”
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