Bed agglomeration characteristics of palm shell and corncob combustion in fluidized bed

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Chaivatamaset P., Sricharoon P., Tia S.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2011

วารสาร: Applied Thermal Engineering (1359-4311)

Volume number: 31

Issue number: 14-15

หน้าแรก: 2916

หน้าสุดท้าย: 2927

จำนวนหน้า: 12

นอก: 1359-4311

eISSN: 1873-5606

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-79960914598&doi=10.1016%2fj.applthermaleng.2011.05.021&partnerID=40&md5=3b74b40de001e167cf05402923d3ed36

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Bed particle agglomeration was studied experimentally in an atmospheric laboratory scale fluidized bed combustor using quartz sand as bed material. Palm shell and corncob were tested. The objectives of the study were (i) to describe the contributions of the biomass ash properties and the operating conditions on the bed agglomeration tendency in term of the bed defluidization time (t def) and the extent of potassium accumulation in the bed (K/Bed) and (ii) to further elucidate the ash inorganic behaviors and the governing bed agglomeration mechanisms. Defluidization caused by the bed agglomeration was experienced in all experiments during combustion of these biomasses, as a consequence of the presence of potassium in biomass. The experimental results indicated that biomass ash characteristics were the significant influence on the bed agglomeration. The increasing bed temperature, bed particle size and static bed height and the decreasing fluidizing air velocity enhanced the bed agglomeration tendency. The SEM/EDS analyses on the agglomerates confirmed that the agglomeration was attributed to the formation of potassium silicate liquid enriched on the surface of quartz sand particles in conjunction with the high surface temperature of the burning biomass char particles. Thermodynamic examination based on the phase diagram analysis confirmed that the molten phase formation was responsible for the agglomeration. In this study, the high molten ash fraction resulting from the high potassium content in biomass promoted the agglomeration and thus defluidization. ฉ 2011 Elsevier Ltd. All rights reserved.

คำสำคัญ

Palm shell