Gasification operational characteristics of 20-tons-Per-Day rice husk fluidized-bed reactor

Sung Jin Park, Seong Hye Son, Jin Woo Kook, Ho Won Ra, Sang Jun Yoon, Tae Young Mun, Ji Hong Moon, Sung Min Yoon, Jae Ho Kim, Yong Ku Kim, Jae Goo Lee, Do Yong Lee, Myung Won Seo

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Converting rice husk into energy is a promising method of generating renewable energy and reducing greenhouse gas emissions. The characteristics of rice husk gasification were investigated at an equivalence ratio (ER) of 0.20–0.35 and a gasifier temperature of 700–850 °C in a 20-tons-per-day (TPD) bubbling fluidized-bed gasifier system. The optimal conditions of the gasification operation were an ER of 0.20 and gasifier temperature of 800 °C. The low heating value of the gas product and cold gas efficiency were 1373.18 kcal/Nm3 and 70.75%, respectively. After passing the generated gas through the gas cleaning units, it was confirmed that the tar in the product gas was removed with an efficiency of 98%. The cleaned product gas was used for the operation of 400 kWe gas engine. Pressure loss often occurred at the bottom of the gasifier during the gasification operation; we found that the agglomerates generated by the gasification process caused it. Computational particle fluid dynamics simulations were performed to investigate the fluidizing characteristics of agglomerates. To prevent the pressure loss caused by the agglomerates, the stable control of temperature inside the gasifier is needed and an ash removal device remove agglomerates should be installed to maintain stable long-term operation.

Original languageEnglish
Pages (from-to)788-798
Number of pages11
JournalRenewable Energy
Volume169
DOIs
StatePublished - May 2021

Keywords

  • Computational particle fluid dynamics
  • Equivalence ratio
  • Gasification
  • Rice husk
  • Tar removal

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