Preparation of methane by biomass fermentation is usually with problems of low CH4 yield and high CO2 content. Herein, cellulose was directly converted into CH4 by hydrothermal catalytic method under mild conditions. A series of catalysts for the conversion were studied, Ru/C was found to show the superior performance. The influence of reaction time, temperature, initial H2 pressure and Ru/C catalyst dosage on cellulose methanation in water were investigated in detail, and the maximum CH4 yield of 88.1% (no detectable CO2 formation) was produced at the condition of 1 MPa initial H2, 220°C, 12 h. TEM, BET, XRD and FT-IR characterizations showed that the highly activity of Ru/C catalyst was probably related to the large surface area and highly dispersed tiny Ru particles on the carbon surface. The method developed in this study presents obvious advantages according to the high CH4 yield, low CO2 emission (<5%) and mild reaction conditions.
ZHANG Cai-hong
,
LIU Qi-ying
,
WANG Hai-yong
,
WANG Chen-guang
,
MA Long-long
. Investigation on One-Step Direct Hydrothermal Conversion of Cellulose into Methane under Mild Conditions[J]. Advances in New and Renewable Energy, 2018
, 6(5)
: 339
-345
.
DOI: 10.3969/j.issn.2095-560X.2018.05.001
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