Big problem, little answer: overcoming bed agglomeration and reactor slagging during the gasification of barley straw under continuous operation,Sustainable Energy & Fuels

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Big problem, little answer: overcoming bed agglomeration and reactor slagging during the gasification of barley straw under continuous operation
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-05-25 , DOI: 10.1039/d0se00155d
Hassan A. Alabdrabalameer _{1,

2,

3,

4,

5} , Martin J. Taylor _{1,

2,

3,

4,

5} , Juho Kauppinen _{6,

7,

8,

9} , Teemu Soini _{6,

7,

8,

9,

10} , Toni Pikkarainen _{6,

7,

8,

9} , Vasiliki Skoulou _{1,

2,

3,

4,

5}

Affiliation

Defluidisation as a result of reactor bed agglomeration is a global challenge associated with the gasification of lignocellulosic biomass waste, specifically its high inorganic content. The use of conventional water leaching has been scrutinised for the removal of inorganic constituents from barley straw, a highly abundant waste feedstock with a high ash content. The resulting pre-treated material was subsequently gasified at 750 °C and 850 °C under continuous flow, where it was found that bed agglomeration as a result of the ash melting induced mechanism can be eliminated, as visualised by SEM and EDX studies. Here, the presence of eutectic mixtures result in the fusing of a SiO₂ rich bed material that causes a sudden pressure drop in the reactor, resulting in a forced shutdown. Leached barley straw was found to effectively solve this issue and sustained gasification for a long period of time, as well as limiting inorganic based decoration on the surface of bed material grains after reaction. Additionally, leaching was found to enhance the production of low carbon fuel gases where an improved product yield of 31.9 vol% and 37.3 vol% for CO and CH₄ was observed at 850 °C, as compared to untreated equivalent.

中文翻译：

大问题，少回答：连续操作下克服大麦秸秆气化过程中的床结块和反应器结渣

由于反应器床附聚而引起的去流体化是与木质纤维素生物质废物的气化相关的全球挑战，特别是其高无机含量。为了从大麦秸秆中去除无机成分，已仔细研究了常规水浸的使用，大麦秸秆是一种具有高灰分含量的高度丰富的废物原料。随后将所得的预处理材料在连续流下于750°C和850°C进行气化，发现通过灰分熔融诱导的机理，床层结块可以消除，如SEM和EDX研究所示。在此，共晶混合物的存在导致SiO ₂的熔融富床物质会导致反应器中的压力突然下降，从而导致强制停机。发现浸出的大麦秸秆可有效解决该问题并持续长时间气化，并限制反应后床料颗粒表面的无机基装饰。另外，发现浸提增强了低碳燃料气体的产生，与未处理的等价物相比，在850℃下观察到CO和CH _4的产物收率提高了31.9vol％和37.3vol％。

更新日期：2020-06-30

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