Air gasification of digestate and its co‑ gasification with residual biomass in a pilot scale rotary kiln

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Freda c.; Nanna f.; Villone a.; Barisano d.; Brandani s.; Cornacchia g.

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Journal Paper

Paper Information

Journal: INTERNATIONAL JOURNAL OF ENERGY AND ENVIRONMENTAL ENGINEERING Year:2019 | Volume:10 | Issue:3 Page(s): 335-346

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Title

Air gasification of digestate and its co‑ gasification with residual biomass in a pilot scale rotary kiln

Author(s)

Keywords

Equivalence ratio

Raw gas

Cold gas efficiency

Autothermal gasification

Simulation

Co-gasification

Abstract

In this study energy recovery of digestate from a biogas plant was investigated via air gasification. Gasification tests were executed in a pilot scale rotary kiln plant having a nominal biomass feeding rate of about 20 kg/h. The Equivalence ratio was varied from 0. 22 to 0. 39 with the goal to approach the autothermal condition. Tests were carried out for 5 h in steady state condition. Syngas composition, char and gas yields were measured. To improve the Cold gas efficiency of the process, a mixture of digestate and almond shells (60: 40 wt%) was gasified. Autothermal condition was reached with the mixture using Equivalence ratio of 0. 30 where the corresponding Cold gas efficiency achieved the maximum value of 55%. The Raw gas had a lower heating value of 4– 5 MJ/Nm3. To evaluate possible improvements in the produced gas properties, in this work the effect of steam injection was also investigated.

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APA: Copy

Freda, c., Nanna, f., Barisano, d., Brandani, s., Cornacchia, g., & Villone, a.. (2019). Air gasification of digestate and its co‑ gasification with residual biomass in a pilot scale rotary kiln. INTERNATIONAL JOURNAL OF ENERGY AND ENVIRONMENTAL ENGINEERING, 10(3), 335-346. SID. https://sid.ir/paper/327273/en

Vancouver: Copy

Freda c., Nanna f., Barisano d., Brandani s., Cornacchia g., Villone a.. Air gasification of digestate and its co‑ gasification with residual biomass in a pilot scale rotary kiln. INTERNATIONAL JOURNAL OF ENERGY AND ENVIRONMENTAL ENGINEERING[Internet]. 2019;10(3):335-346. Available from: https://sid.ir/paper/327273/en

IEEE: Copy

c. Freda, f. Nanna, d. Barisano, s. Brandani, g. Cornacchia, and a. Villone, “Air gasification of digestate and its co‑ gasification with residual biomass in a pilot scale rotary kiln,” INTERNATIONAL JOURNAL OF ENERGY AND ENVIRONMENTAL ENGINEERING, vol. 10, no. 3, pp. 335–346, 2019, [Online]. Available: https://sid.ir/paper/327273/en

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