Rueangsan Koson, Kraisoda Pakkip, Heman Adcha, Tasarod Homhuan, Wangkulangkool Monchawan, Trisupakitti Somsuk, Morris John
Department of Agricultural Machinery Engineering, Kalasin University, Thailand.
Department of Chemistry, Rajabhat Maha Sarakham University, Thailand.
Heliyon. 2021 Oct 29;7(11):e08291. doi: 10.1016/j.heliyon.2021.e08291. eCollection 2021 Nov.
We studied the properties of the bio-oil and char from fast pyrolysis of cassava rhizomes in a free-fall reactor, catalyzed by adding various soil conditioners (or improvers) as catalysts to the reactor at 500 °C and 200 g/h feed rate. Four conditioners were evaluated - granular TPI pH11 soil conditioner, volcanic rock, TPI pelletized organic fertilizer and super dolomite - and added at 50% (w/w) of the rhizomes. Bio-oil and gas yields decreased, whereas char yields increased, yielding bio-oil 57-59%, gas 14-20% and char 23-28%. With the catalysts, the bio-oil higher heating value increased, while that of char decreased: for cassava rhizomes with volcanic rock the bio-oil high heating value increased from 19.4 to 23.6 MJ/kg, whereas rhizomes with dolomite led to an increased viscosity from 27 to 34 × 10 mm/s.
我们在自由落体反应器中研究了木薯根茎快速热解产生的生物油和焦炭的性质，在500℃、进料速率200 g/h的条件下，通过向反应器中添加各种土壤改良剂（或改良剂）作为催化剂进行催化。评估了四种改良剂——颗粒状TPI pH11土壤改良剂、火山岩、TPI颗粒状有机肥和超级白云石——并以根茎重量的50%（w/w）添加。生物油和气体产率降低，而焦炭产率增加，生物油产率为57-59%，气体产率为14-20%，焦炭产率为23-28%。使用催化剂后，生物油的高热值增加，而焦炭的高热值降低：对于添加火山岩的木薯根茎，生物油的高热值从19.4 MJ/kg增加到23.6 MJ/kg，而添加白云石的根茎导致粘度从27×10⁻³mm²/s增加到34×10⁻³mm²/s。
