Gasification is a promising approach for converting solid fuel sources, including renewable ones like biomass, for use. The main problem in biomass gasification is the formation of condensable tars, including polycyclic aromatic hydrocarbons (PAHs). This paper investigated the conversion of tar components during corn straw gasification. It analyzed collected tar components using a gas chromatograph-mass spectrograph (GC-MS). Experimental results indicate that, with increasing temperature from 700°C to 900°C, the concentrations of benzene, indene, phenanthrene, naphthalene, acenaphthylene, fluorene, and pyrene increased whereas those of toluene, phenol, 1-methylnaphthalene, and 2-methylnaphthalene decreased. As the equivalence ratio (ER) increased from 0.21 to 0.34, the concentrations of indene and phenanthrene increased from 0.148% and 0.087% to 0.232% and 0.223%, respectively. Further, the phenol content increased as ER increased from 0.21 to 0.26 and then decreased as the ER increased further to 0.34. Other parameters like the steam/biomass (S/B) ratio and catalyst also played a critical role in tar reduction. This paper demonstrates the conversion of some tar components and elucidates their chemical properties during gasification.
. [J]. Frontiers in Energy, 2021, 15(2): 374-383.
Shuai GUO, Xiao WEI, Deyong CHE, Hongpeng LIU, Baizhong SUN. Experimental study on influence of operating parameters on tar components from corn straw gasification in fluidized bed. Front. Energy, 2021, 15(2): 374-383.
S Fremaux, S M Beheshti, H Ghassemi, et al.. An experimental study on hydrogen-rich gas production via steam gasification of biomass in a research-scale fluidized bed. Energy Conversion and Management, 2015, 91: 427–432 https://doi.org/10.1016/j.enconman.2014.12.048
2
M Mayerhofer, S Fendt, H Spliethoff, et al.Fluidized bed gasification of biomass—in bed investigation of gas and tar formation. Fuel, 2014, 117(part B): 1248–1255 https://doi.org/10.1016/j.fuel.2013.06.025
3
M Mayerhofer, P Mitsakis, X M Meng, et al.. Influence of pressure, temperature and steam on tar and gas in allothermal fluidized bed gasification. Fuel, 2012, 99: 204–209 https://doi.org/10.1016/j.fuel.2012.04.022
4
A Horvat, D S Pandey, M Kwapinska, et al.. Tar yield and composition from poultry litter gasification in a fluidised bed reactor: effects of equivalence ratio, temperature and limestone addition. RSC Advances, 2019, 9(23): 13283–13296 https://doi.org/10.1039/C9RA02548K
5
J M De Andrés, A Narros, M E Rodríguez. Behaviour of dolomite, olivine and alumina as primary catalysts in air-steam gasification of sewage sludge. Fuel, 2011, 90(2): 521–527 https://doi.org/10.1016/j.fuel.2010.09.043
6
S Guo, X Wei, J Li, et al.. Experimental study on product gas and tar removal in air-steam gasification of corn straw in a bench-scale internally circulating fluidized bed. Energy & Fuels, 2020, 34(2): 1908–1917 https://doi.org/10.1021/acs.energyfuels.9b04008
7
Y H Qin, A Campen, T Wiltowski, et al.. The influence of different chemical compositions in biomass on gasification tar formation. Biomass and Bioenergy, 2015, 83: 77–84 https://doi.org/10.1016/j.biombioe.2015.09.001
8
Z Y Zhang, S S Pang. Experimental investigation of biomass devolatilization in steam gasification in a dual fluidised bed gasifier. Fuel, 2017, 188: 628–635 https://doi.org/10.1016/j.fuel.2016.10.074
9
B L Zhou, A Dichiara, Y M Zhang, et al.. Tar formation and evolution during biomass gasification: an experimental and theoretical study. Fuel, 2018, 234: 944–953 https://doi.org/doi 10.1016/j.fuel.2018.07.105
10
F Kirnbauer, V Wilk, H Hofbauer. Performance improvement of dual fluidized bed gasifiers by temperature reduction: the behavior of tar species in the product gas. Fuel, 2013, 108: 534–542 https://doi.org/10.1016/j.fuel.2012.11.065
11
D D Feng, Y J Zhao, Y Zhang, et al.. In-situ steam reforming of biomass tar over sawdust biochar in mild catalytic temperature. Biomass and Bioenergy, 2017, 107: 261–270 https://doi.org/10.1016/j.biombioe.2017.10.007
12
M L Valderrama Rios, A M González, E E S Lora, et al.. Reduction of tar generated during biomass gasification: a review. Biomass and Bioenergy, 2018, 108: 345–370 https://doi.org/10.1016/j.biombioe.2017.12.002
13
Q Z Yu, C Brage, T Nordgreen, et al.. Effects of Chinese dolomites on tar cracking in gasification of birch. Fuel, 2009, 88(10): 1922–1926 https://doi.org/10.1016/j.fuel.2009.04.020
14
Y Tian, X Zhou, S H Lin, et al.. Syngas production from air-steam gasification of biomass with natural catalysts. Science of the Total Environment, 2018, 645: 518–523 https://doi.org/10.1016/j.scitotenv.2018.07.071
15
M Cortazar, G Lopez, J Alvarez, et al.. Behaviour of primary catalysts in the biomass steam gasification in a fountain confined spouted bed. Fuel, 2019, 253: 1446–1456 https://doi.org/10.1016/j.fuel.2019.05.094
16
F Miccio, B Piriou, G Ruoppolo, et al.. Biomass gasification in a catalytic fluidized reactor with beds of different materials. Chemical Engineering Journal, 2009, 154(1–3): 369–374 https://doi.org/10.1016/j.cej.2009.04.002
17
Z H Min, M Asadullah, P Yimsiri, et al.. Catalytic reforming of tar during gasification. Part I. Steam reforming of biomass tar using ilmenite as a catalyst. Fuel, 2011, 90(5): 1847–1854 https://doi.org/10.1016/j.fuel.2010.12.039
18
B J Vreugdenhil, R W R Zwart. Tar formation in pyrolysis and gasification. Petten: Energy and Research Centre of the Netherlands (ECN: Report ECN-E-08–087, 2009
19
M Cortazar, J Alvarez, G Lopez, et al.. Role of temperature on gasification performance and tar composition in a fountain enhanced conical spouted bed reactor. Energy Conversion and Management, 2018, 171: 1589–1597 https://doi.org/10.1016/j.enconman.2018.06.071
20
Z Q Wu, W C Yang, H Y Meng, et al.. Physicochemical structure and gasification reactivity of co-pyrolysis char from two kinds of coal blended with lignocellulosic biomass: effects of the carboxymethylcellulose sodium. Applied Energy, 2017, 207: 96–106 https://doi.org/10.1016/j.apenergy.2017.05.092
21
Y D Kim, C W Yang, B J Kim, et al.. Air-blown gasification of woody biomass in a bubbling fluidized bed gasifier. Applied Energy, 2013, 112: 414–420 https://doi.org/10.1016/j.apenergy.2013.03.072
22
X Y Ma, X Zhao, J Y Gu, et al.. Co-gasification of coal and biomass blends using dolomite and olivine as catalysts. Renewable Energy, 2019, 132: 509–514 https://doi.org/10.1016/j.renene.2018.07.077
23
J G Meng, X B Wang, Z L Zhao, et al.. Highly abrasion resistant thermally fused olivine as in-situ catalysts for tar reduction in a circulating fluidized bed biomass gasifier. Bioresource Technology, 2018, 268: 212–220 https://doi.org/10.1016/j.biortech.2018.07.135
24
Z Y Zhang, S S Pang. Experimental investigation of tar formation and producer gas composition in biomass steam gasification in a 100 kW dual fluidised bed gasifier. Renewable Energy, 2019, 132: 416–424 https://doi.org/10.1016/j.renene.2018.07.144
25
R N State, A Volceanov, P Muley, et al.. A review of catalysts used in microwave assisted pyrolysis and gasification. Bioresource Technology, 2019, 277: 179–194 https://doi.org/10.1016/j.biortech.2019.01.036