Items where Author is "Várhegyi, Gábor"

Várhegyi, Gábor and Wang, Liang and Skreiberg, Øyvind (2020) Empirical Kinetic Models for the Combustion of Charcoals and Biomasses in the Kinetic Regime. ENERGY & FUELS, 34 (12). pp. 16302-16309. ISSN 0887-0624

Várhegyi, Gábor and Wang, Liang and Skreiberg, Øyvind (2020) Non-isothermal kinetics: best-fitting empirical models instead of model-free methods. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 142. pp. 1043-1054. ISSN 1388-6150

Várhegyi, Gábor (2019) Empirical models with constant and variable activation energy for biomass pyrolysis. ENERGY & FUELS, 33 (3). pp. 2348-2358. ISSN 0887-0624 (nyomtatott); 1520-5029 (online)

Várhegyi, Gábor (2019) Supporting Information for Article Empirical Models with Constant and Variable Activation Energy for Biomass Pyrolysis. ENERGY & FUELS, 33 (3). pp. 1-56. ISSN 0887-0624 (nyomtatott); 1520-5029 (online)

Wang, Liang and Li, Tian and Várhegyi, Gábor and Skreiberg, Øyvind and Løvås, Terese (2018) Co2 gasification of chars prepared by fast and slow pyrolysis from wood and forest residue: A kinetic study. ENERGY AND FUELS, 32. pp. 588-597. ISSN 0887-0624

Várhegyi, Gábor and Wang, L. and Skreiberg, Ø. (2018) Towards a meaningful non-isothermal kinetics for biomass materials and other complex organic samples. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 133. pp. 703-712. ISSN 1388-6150

Barta-Rajnai, Eszter and Várhegyi, Gábor and Liang, Wang and Skreiberg, Øyvind and Grønli, Morten and Czégény, Zsuzsanna (2017) Thermal decomposition kinetics of wood and bark and their torrefied products. Energy Fuels, 31. pp. 4024-4034. ISSN 1520-5029

Wang, Liang and Várhegyi, Gábor and Skreiberg, Øyvind and Li, Tian and Grønli, Morten and Antal, Michael J., Jr. (2016) Combustion Characteristics of Biomass Charcoals Produced at Different Carbonization Conditions: A Kinetic Study. ENERGY AND FUELS, 30 (4). pp. 3186-3197. ISSN 0887-0624

Várhegyi, Gábor (2016) From "Sirups" to Biocarbons: A 30 Year Research Cooperation for Better Biomass Utilization with Michael J. Antal, Jr. ENERGY AND FUELS, 30 (10). pp. 7887-7895. ISSN 0887-0624

Várhegyi, Gábor (2016) In Honor of Michael J. Antal. ENERGY AND FUELS, 30 (10). p. 7809. ISSN 0887-0624

Liang, Wang and Várhegyi, Gábor and Skreiberg, Øyvind and Grønli, Morten and Antal, Michael J. (2015) Combustion characteristics of biomass charcoal produced at different carbonization conditions. In: Procedings of 23rd European Biomass Conference and Exhibition. ETA-Florence Renewable Energies, Bécs, pp. 1196-1199. ISBN 978-88-89407-516

Liang, Wang and Hu, Kathryn and Higashi, Charissa and Skreiberg, Øyvind and Myrvågnes, Viktor and Várhegyi, Gábor (2015) Effect of storage time and conditions on biomass charcoal properties. In: Procedings of 23rd European Biomass Conference and Exhibition. ETA-Florence Renewable Energies, Bécs, pp. 1180-1183. ISBN 978-88-89407-516

Wang, Liang and Várhegyi, Gábor and Skreiberg, Øyvind (2014) CO2 Gasification of torrefied wood. A kinetic study. ENERGY & FUELS, 28. pp. 7582-7590. ISSN 0887-0624

Tapasvi, Dhruv and Khalil, Roger and Várhegyi, Gábor and Skreiberg, Øyvind and Tran, Khanh-Quang and Grønli, Morten (2013) Kinetic Behavior of Torrefied Biomass in an Oxidative Environment. Energy and Fuels, 27 (2). pp. 1050-1060. ISSN 0887-0624

Várhegyi, Gábor and Barta, Zsolt and Bélafiné dr. Bakó, Katalin and Dienes, Dóra and Gyalai-Korpos, Miklós and Herseczki, Zsanett and Marton, Gyula and Mészáros, Erika and Jakab, Emma and Réczey, Istvánné and Sáhó, Éva and Sebestyén, Zoltán and Sipos, Bálint (2013) Biomassza hasznosítás kémiai alapfolyamatainak tanulmányozása = Study of fundamental chemical processes of biomass utilization. Project Report. OTKA.

Wang, L. and Sandquist, J. and Várhegyi, Gábor and Güell, M. B. (2013) CO2 gasification of chars prepared from wood and forest residue. ENERGY & FUELS, 27 (10). pp. 6098-6107. ISSN 0887-0624

Tapasvi, D. and Khalil, R. and Várhegyi, Gábor and Tran, Khanh-Quang and Gronli, M. and Skreiberg, O. (2013) Thermal Decomposition Kinetics of Woods with an Emphasis on Torrefaction. ENERGY & FUELS, 27 (10). pp. 6134-6145. ISSN 0887-0624

Várhegyi, Gábor and Sebestyén, Zoltán and Czégény, Zsuzsanna and Lezsovits, Ferenc and Könczöl, Sándor (2012) Combustion Kinetics of Biomass Materials in the Kinetic Regime. ENERGY & FUELS, 26 (2). pp. 1323-1335. ISSN 0887-0624

Trninić, Marta and Wang, Liang and Várhegyi, Gábor and Grønli, Morten and Skreiberg, Øyvind (2012) Kinetics of Corncob Pyrolysis. ENERGY & FUELS, 26 (4). pp. 2005-2013. ISSN 0887-0624

Sebestyén, Zoltán and Lezsovits, Ferenc and Jakab, Emma and Várhegyi, Gábor (2011) Correlation between heating values and thermogravimetric data of sewage sludge, herbaceous crops and wood samples. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2012 (110). pp. 1501-1509. ISSN 1388-6150

Várhegyi, Gábor and Bobály, Balázs and Jakab, Emma and Chen, Honggang (2011) Thermogravimetric Study of Biomass Pyrolysis Kinetics. A Distributed Activation Energy Model with Prediction Tests. ENERGY & FUELS, 25. pp. 24-32. ISSN 0887-0624

Várhegyi, Gábor and Czégény, Zsuzsanna and Liu, Chuan and McAdam, Kevin (2010) Thermogravimetric analysis of tobacco combustion assuming DAEM devolatilization and empirical char-burnoff kinetics. INDUSTRIAL and ENGINEERING CHEMISTRY RESEARCH, 49. pp. 1591-1599. ISSN 0888-5885

Várhegyi, Gábor and Chen, Honggang and Godoy, Sandra (2009) Thermal Decomposition of Wheat, Oat, Barley, and Brassica carinata Straws : A Kinetic Study. ENERGY & FUELS, 23 (1). pp. 646-652. ISSN 0887-0624

Khalil, Roger and Várhegyi, Gábor and Jäschke, Susanne and Gronli, Morten G. and Hustad, Johan (2009) CO2 Gasification of Biomass Chars: A Kinetic Study. ENERGY & FUELS, 23 (1). pp. 94-100. ISSN 0887-0624

Wu, Mingbo and Várhegyi, Gábor and Zha, Qingfang (2009) Kinetics of cellulose pyrolysis after a pressurized heat treatment. THERMOCHIMICA ACTA, 496. pp. 59-65. ISSN 0040-6031

Várhegyi, Gábor and Czégény, Zsuzsanna and Jakab, Emma and McAdam, Kevin and Liu, Chuan (2009) Tobacco pyrolysis. Kinetic evaluation of thermogravimetric – mass spectrometric experiments. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 86. pp. 310-322. ISSN 0165-2370

Jakab, Emma and Blazsó, Marianne and Várhegyi, Gábor (2007) Adalékanyagok hatása a hulladékhasznosítás szempontjából fontos hőbomlási folyamatokban = Effect of additives on the thermal decomposition reactions occurring in waste utilization. Project Report. OTKA.

Várhegyi, Gábor (2007) Aims and methods in non-isothermal reaction kinetics. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 79. pp. 278-288. ISSN 0165-2370

Várhegyi, Gábor and Jakab, Emma (2007) Biomassza tüzelőanyagok optimális hasznosítását elősegítő alapkutatás termikus analízis segítségével = Fundamental research by thermal analysis for the optimal utilization of biomass fuels. Project Report. OTKA.

Becidan, Michaël and Várhegyi, Gábor and Hustad, Johan and Skreiberg, Øyvind (2007) Thermal decomposition of biomass wastes. A kinetic study. INDUSTRIAL and ENGINEERING CHEMISTRY RESEARCH, 46. pp. 2428-2437. ISSN 0888-5885

Várhegyi, Gábor and Mészáros, Erika and Antal, Michael, J. and Bourke, Jared and Jakab, Emma (2006) Combustion Kinetics of Corncob Charcoal and Partially Demineralized Corncob Charcoal in the Kinetic Regime. INDUSTRIAL and ENGINEERING CHEMISTRY RESEARCH, 45. pp. 4962-4970. ISSN 0888-5885

Mészáros, Erika and Várhegyi, Gábor and Jakab, Emma and Marosvölgyi, Béla (2004) Thermogravimetric and reaction kinetic analysis of biomass samples from an energy plantation. ENERGY & FUELS, 18 (2). pp. 497-507. ISSN 0887-0624

Várhegyi, Gábor and Grønli, Morten and Di Blasi, Colomba (2004) Effects of sample origin, extraction and hot water washing on the devolatilization kinetics of chestnut wood. INDUSTRIAL and ENGINEERING CHEMISTRY RESEARCH, 43. pp. 2356-2367. ISSN 0888-5885

Várhegyi, Gábor and Szabó, Piroska and Antal, Michael J. (2002) Kinetics of Charcoal Devolatilization. ENERGY & FUELS, 16. pp. 724-731. ISSN 0887-0624

Várhegyi, Gábor and Szabó, Piroska and Jakab, Emma and Till, Ferenc (2001) Least squares criteria for the kinetic evaluation of thermoanalytical experiments. Examples from a char reactivity study. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 57. pp. 203-222. ISSN 0165-2370

Várhegyi, Gábor and Till, Ferenc (1999) Comparison of temperature programmed char combustion in CO2 - O2 and Ar - O2 mixtures at elevated pressure. ENERGY & FUELS, 13. pp. 539-540. ISSN 0887-0624

Várhegyi, Gábor and Till, Ferenc (1999) Computer processing of thermogravimetric - mass spectrometric and high pressure thermogravimetric data. Part 1. Smoothing and differentiation. THERMOCHIMICA ACTA, 329. pp. 141-145. ISSN 0040-6031

Grønli, Morten and Antal, Michael J. and Várhegyi, Gábor (1999) A round-robin study of cellulose pyrolysis kinetics by thermogravimetry. INDUSTRIAL and ENGINEERING CHEMISTRY RESEARCH, 38. pp. 2238-2244. ISSN 0888-5885

Antal, Michael J. and Várhegyi, Gábor and Jakab, Emma (1998) Cellulose pyrolysis kinetics: Revisited. INDUSTRIAL and ENGINEERING CHEMISTRY RESEARCH, 37. pp. 1267-1275. ISSN 0888-5885

Várhegyi, Gábor and Szabó, Piroska and Till, Ferenc and Zelei, Borbála and Antal, Michael J. and Dai, Xiangfeng (1998) TG, TG-MS and FTIR Characterization of High-Yield Biomass Charcoals. ENERGY & FUELS, 12. pp. 969-974. ISSN 0887-0624

Antal, Michael J. and Várhegyi, Gábor (1997) Impact of systematic errors on the determination of cellulose pyrolysis kinetics. ENERGY & FUELS, 11. pp. 1309-1310. ISSN 0887-0624

Várhegyi, Gábor and Antal, Michael J. and Jakab, Emma and Szabó, Piroska (1997) Kinetic modeling of biomass pyrolysis : 10 years of a US - Hungarian cooperation. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 42. pp. 73-87. ISSN 0165-2370

Várhegyi, Gábor and Antal, Michael J. and Szabó, Piroska and Jakab, Emma and Till, Ferenc (1996) Application of complex reaction kinetic models in thermal analysis. The least squares evaluation of series of experiments. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 47. pp. 535-542. ISSN 1388-6150

Várhegyi, Gábor and Szabó, Piroska and Jakab, Emma and Till, Ferenc and Richard, Jean-Robert (1996) Mathematical modeling of char reactivity in Ar-O2 and CO2-O2 mixtures. ENERGY & FUELS, 10. pp. 1208-1214. ISSN 0887-0624

Várhegyi, Gábor and Jakab, Emma and Antal, Michael J. (1994) Is the Broido - Shafizadeh model for cellulose pyrolysis true? ENERGY & FUELS, 8. pp. 1345-1352. ISSN 0887-0624

Várhegyi, Gábor and Szabó, Piroska and Antal, Michael J. (1994) Kinetics of the thermal decomposition of cellulose under the experimental conditions of thermal analysis. Theoretical extrapolations to high heating rates. Biomass and Bioenergy, 7. pp. 69-74. ISSN 0961-9534

Várhegyi, Gábor and Szabó, Piroska and Mok, William Shu-Lai and Antal, Michael J. (1993) Kinetics of the thermal decomposition of cellulose in sealed vessels at elevated pressures : Effects of the presence of water on the reaction mechanism. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 26. pp. 159-174. ISSN 0165-2370

Várhegyi, Gábor and Szabó, Piroska and Antal, Michael J. (1993) Reaction kinetics of the thermal decomposition of cellulose and hemicellulose in biomass materials. In: Advances in Thermochemical Biomass Conversion. Springer Netherlands, London, pp. 760-771. ISBN 978-94-010-4582-7