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Rice husk gasification: from industry to laboratory

Nguyen H.N., Van De Steene L., Thi Thuy Hang Le, Le D.D., Ha-Duong M.. 2018. In : 4th International Conference on Environment and Renewable Energy (ICERE 2018). Bristol : IOP Publishing, p. 243-251. (IOP Conference Series: Earth and Environmental Science, 159). International Conference on Environment and Renewable Energy (ICERE 2018). 4, 2018-02-25/2018-02-27, Da Nang (Viet Nam).

DOI: 10.1088/1755-1315/159/1/012033

Rice husk gasification (RHG) has been increasingly paid attention in rice-producing countries. Nevertheless, information related to this technology remains small and fragmented. In this paper, the status of RHG has been summarized, highlighting domestic and industrial applications, as well as a scientific review. Moreover, an experimental parametric study was performed to measure: a) the influence of temperature and heating rate on RH pyrolysis, and b) the role of temperature, partial pressure, and heating rate on RHG, under H2O or CO2 atmosphere. Regarding pyrolysis, an increase in the final pyrolysis temperature lowers the RH char yield but does not have much effect on the char morphology. Regarding gasification, an increase in the reaction temperature from 900 to 1000°C accelerates about 4.8 and 7 times the char conversion rate, under 0.2 atm of CO2 or H2O, respectively. The conversion rate decreases about 1.8 times when CO2 partial pressure decreases from 1 to 0.2 atm, and about 1.6 times when H2O partial pressure decreases from 0.4 to 0.1 atm. At 900°C and 0.2 atm, steam gasification was about 3.5 times faster than Boudouard reaction.

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