[01] Bimal Acharya, School of Engineering, University of Guelph, Guelph, Canada. [02] Animesh Dutta, School of Engineering, University of Guelph, Guelph, Canada.

Gasification is a thermochemical conversion method that transforms carboneous constituents into synghesis gas (syngas:CO, H₂, CO₂) at high temperatures, generally at more than 700°C, in a control amount of oxygen, carbon dioxide, steam environment so that there will be no combustion. Syngas is a good fuel for producing ethanol or diesel. Gasification in a CO₂ environment is an interest of this research. This study finds the optimum experimental condition parameters for the carbon dioxide (CO₂) cogasification of Ontario coal and torrefied biomass blends for the equal ratio of each sample using TGA-FTIR. The operating conditions for the heating rate, CO₂ flow rate, maximum gasification target temperature, Nitrogen and CO₂ flow combinations are observed with the 10mg of coal-biomass mixture. From the experiment, the optimum CO₂ flow rate is found at 50 ml/min; the optimum heating rate observed is at 10C/min; the optimum condition to run N2 is up to 800C followed by CO₂ up to the final gasification temperature. For the full gasification, maximum temperature needs to be from 1250-1300°C.

CO₂ Gasification, TGA-FTIR, Dry & Wet Torrefaction, Miscanthus

[01] Acharya, B., 2013. Torrefaction and Pelletization of Different Forms of Biomass of Ontario MASc thesis, University of Guelph, Canada https://dspace.lib.uoguelph.ca/xmlui/handle/10214/6608 (Accessed 21 March 2015). [02] Acharya, B., Dutta, A., 2013. Characterization of Torrefied Willow for Combustion Application. J. Biobased Mater. Bioenergy. 7(6), 667-674. [03] Acharya, B., Sule, I., Dutta, A., (2012). A review on advances of torrefaction technologies for biomass processing. Biomass Convers. Biorefin. 2(4), 349-369. [04] Al-Mansour, F., Zuwala, J., 2010. An evaluation of biomass co-firing in Europe. Biomass Bioenergy. 34, 620-629. [05] Bridgeman, T.G., Jones, J.M., Shield, I., and Williams P.T., 2008. Torrefaction of reed canary grass, wheat straw and willow to enhance solid fuel qualities and combustion properties. J. Fuels. 87, 844-856. [06] Deng, J.; Wang, G.; Kuang, J.; Zhang, Y.; Luo, Y. 2009. Pretreatment of agricultural residues for co-gasification via torrefaction. J. Anal. Appl. Pyrolysis. 86 (2), 331-337. [07] Fermoso, J., Arias, B., Gil, M., Plaza, M., Pevida, C., Pis, J., Rubiera, F., 2010. Co-gasification of different rank coals with biomass and petroleum coke in a high pressure reactor for H2-rich gas production. Bioresour. Technol. 101 (9), 3230-3235. [08] Funke, A., Reebs, F., Kruse, A., 2013. Experimental comparison of hydrothermal and vapothermal carbonization. Fuel Proces. Technol. 115, 261-269. [09] Gil, M., Casal, D., Pevida, C., Pis, J., Rubiera, F., 2010. Thermal behaviour and kinetics of coal/biomass blends during co-combustion. Bioresour. Technol. 101 (14), 5601-5608. [10] Goldfarb, J. L., and Liu, C., 2013. Impact of blend ratio on the co-firing of a commercial torrefied biomass and coal via analysis of oxidation kinetics. Bioresour. Technol. 149, 208-215. [11] Kambo, H. S., Dutta, A., 2014. Strength, storage, and combustion characteristics of densified lignocellulosic biomass produced via torrefaction and hydrothermal carbonization. Appl. Energy. 135, 182-191. [12] Li, J., Brzdekiewicz, A., Yang, W., Blasiak, W., 2012. Co-firing based on biomass torrefaction in a pulverized coal boiler with aim of 100% fuel switching. Appl. Energy. 99, 344–354. [13] Prins, M. J., Ptasinski, K. J., Janssen, F. J. J. G., 2006. More efficient biomassgasification via torrefaction. Energy. 31 (15), 3458-3470. [14] Tumuluru, J.S., Sokhansanj S., Hess, J.R., Wright, C.T., Boardman, R.D., 2011. A review on biomass torrefaction process and product properties for energy applications. Indu. Biotechnol. 7(5), 384-401. [15] Vincent, S. S., Mahinpey, N., Aqsha, A., 2014. Mass transfer studies during CO2 gasification of torrefied and pyrolyzed chars. Energy. 67, 319-327. [16] Xu, C., Hu, S., Xiang, J., Zhang, L., Sun, L., Shuai, C., Chwn Q., He L., Edreis, E., 2014. Interaction and kinetic analysis for coal and biomass co-gasification by TG–FTIR. Bior. Technol. 154, 313-321.