Journal
BIORESOURCE TECHNOLOGY
Volume 245, Issue -, Pages 1075-1083Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.09.052
Keywords
Water-washing; Wheat straw; Evaluation; Combustion properties
Funding
- H2020-WASTE [690142]
- Special Fund for Agro-scientific Research in the Public Interest [201003063]
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A series of experiments was conducted to explore the effects of various water-washing solid-liquid ratios (1: 50 and 1:10) and the stirring on wheat straw (WS) combustion properties. Comparing different solid-liquid ratio groups, a 16% increment in the higher heating value was obtained for 1:50 groups and only 5% for 1:10 groups relative to the raw material. Moreover, energy was lost 4-26 times greater in 1:10 groups than 1:50 groups. While water-washing reduced the comprehensive combustibility index by 14.89%-32.09%, the index values of washed WS were all higher than 2, indicating good combustion performance. The combustion activation energy of four washed WS were 175, 172, 186, and 176 kJ/mol, which were all higher than the 160 kJ/mol of WS. The fouling/slagging propensity of washed WS reduced to a lower possibility compared to medium of untreated WS. Overall, the recommended condition for washing WS before combustion is 1:50 ratio without stirring.
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