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Determination of biomass-coal blending ratio by C-14 measurement in co-firing flue gas
Zhejiang Univ, Hangzhou, Peoples R China.
Zhejiang Univ, Hangzhou, Peoples R China.
Zhejiang Univ, Hangzhou, Peoples R China.
Zhejiang Univ, Hangzhou, Peoples R China.
Vise andre og tillknytning
2019 (engelsk)Inngår i: Journal Of Zhejiang University-Science A, ISSN 1673-565X, Vol. 20, nr 7, s. 475-486Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

To verify the feasibility of using radiocarbon detection for the measurement of the biomass-coal blending ratio in co-firing heat and power plants, C-14 activity detection technology that uses benzene synthesis as the sample preparation method and a liquid scintillation counter as the detection instrument was studied. A benzene synthesis system was built to enrich carbon in the combustion flue gas in the form of benzene. The benzene sample was mixed with scintillator (butyl-PBD) and C-14 activity was measured using a liquid scintillation counter (Quantulus 1220). Three kinds of coal and six kinds of biomass were tested repeatedly. The measured C-14 activity was 0.3365 DPM/gC in Zhundong lignite, 0.2701 DPM/gC in Shenmu bitumite, and 0.3060 DPM/gC in Changzhi anthracite. These values were much higher than the instrument background activity. For the co-fired experiment, we used groups with biomass ratios (based on the carbon) of 6.51%, 12.95%, and 20.75%. A modified empirical expression to determine the biomass, coal blending ratio based on the C-14 activity measured in the co-firing flue gas, was proposed by analyzing and verifying measurement accuracy. From the C-14 measurements of the co-fired samples, the corresponding estimated biomass ratios were (5.540.48)%, (12.310.67)%, and (19.490.90)%. The absolute measurement error was around 1% for a typical biomass-coal co-firing application.

sted, utgiver, år, opplag, sider
2019. Vol. 20, nr 7, s. 475-486
Emneord [en]
Biomass co-firing, Blending ratio determination, Radiocarbon, Benzene synthesis
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-36819DOI: 10.1631/jzus.A1900006ISI: 000475642100001Scopus ID: 2-s2.0-85068752506OAI: oai:DiVA.org:miun-36819DiVA, id: diva2:1341839
Tilgjengelig fra: 2019-08-12 Laget: 2019-08-12 Sist oppdatert: 2019-08-12bibliografisk kontrollert

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