Rice Husk Gasification: from Industry to Laboratory

2018 4th International Conference on Environment and Renewable Energy

生态环境科学;能源学

Nguyen, Hong Nam^1 ; Van De Steene, Laurent^2,3 ; Le, Thi Thuy Hang^4 ; Le, Duc Dung^5 ; Ha-Duong, Minh^6

Energy Department, University of Science and Technology of Hanoi, Hanoi, Viet Nam^1

CIRAD, UPR BioWooEB, Montpellier

F-34398, France^2

BioWooEB, Univ Montpellier, CIRAD, Montpellier, France^3

Institute of Energy Science, VAST, Viet Nam^4

Hanoi University of Science and Technology (HUST), Hanoi, Viet Nam^5

International Research Center on Environment and Development, CNRS, France^6

关键词: Char yield;    Conversion rates;    Parametric study;    Pyrolysis temperature;    Reaction temperature;    Rice husk;    Steam gasification;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/159/1/012033/pdf
DOI  :  10.1088/1755-1315/159/1/012033

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

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 CO2atmosphere. 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 CO2or H2O, respectively. The conversion rate decreases about 1.8 times when CO2partial 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.