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Journals / Journal of Agricultural Sciences / 2026 / Volume: 24 Issue: 3

A Prototype Downdraft Gasifier Design with Mechanical Stirrer for Rice Straw Gasification and Comparative Performance Evaluation for Two Different Airflow Paths

İbrahim Savaş Dalmış(Namik Kemal University, Çorlu Faculty of Engineering, Department of Mechanical Engineering, 59860, Çorlu, Tekirdağ, TURKEY)
Birol Kayişoğlu(Namik Kemal University, Faculty of Agriculture, Department of Biosystem Engineering, 59030, Tekirdağ, TURKEY)
Serkan Tuğ(Namik Kemal University, Vocational School Technical Sciences, 59030, Tekirdağ, TURKEY)
Türkan Aktaş(Namik Kemal University, Faculty of Agriculture, Department of Biosystem Engineering, 59030, Tekirdağ, TURKEY)
Mehmet Recai Durgut(Namik Kemal University, Faculty of Agriculture, Department of Biosystem Engineering, 59030, Tekirdağ, TURKEY)
Figen Daşçı Durgut(Namik Kemal University, Faculty of Agriculture, Department of Biosystem Engineering, 59030, Tekirdağ, TURKEY)
Pages
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Publication Date
2018-09-05
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

H2/CO ratio was found as 1.385 which was higher than the air inlet from tuyeres.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this research, a prototype downdraft throatless gasifier was designed with a mechanical stirrer.
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Key Findings & Data:The diameter of the reactor was 350 mm and a nominal value for the heat power of biomass input was 70 kW.
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Conclusion & Impact:H2/CO ratio was found as 1.385 which was higher than the air inlet from tuyeres.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Biomass gasification · Rice straw · Stirrer

Abstract

In this research, a prototype downdraft throatless gasifier was designed with a mechanical stirrer. The gasifier was designed for gasification of rice straw pellets. The diameter of the reactor was 350 mm and a nominal value for the heat power of biomass input was 70 kW. Rice straws which were collected from Thrace Region of Turkey gasified for determination of the designed gasifier performance in Namik Kemal University Biosystem Engineering Laboratories. The effects of airflow path and stirring process on the gasification efficiency during the gasification process were investigated. Temperatures and airflow rates observed and adjusted by controlling the air flow rate in the automation system constantly. Pellets were gasified using two different airflow paths with the same equivalence ratio of 0.2 and these were compared. Air inlet from the top showed better results than air inlet from tuyeres. For the air inlet from the top, the higher heating value of producer gas was determined as 5.047 MJ Nm-3 and cold gas efficiency was calculated as 65.4%. H2/CO ratio was found as 1.385 which was higher than the air inlet from tuyeres.

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Cite This Article

Dalmış, İ. S., Kayişoğlu, B., Tuğ, S., Aktaş, T., Durgut, M. R., Durgut, F. D. (2018). A Prototype Downdraft Gasifier Design with Mechanical Stirrer for Rice Straw Gasification and Comparative Performance Evaluation for Two Different Airflow Paths. Journal of Agricultural Sciences, Volume: 24 Issue: 3. https://doi.org/10.15832/ankutbd.456649

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