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首页> 外文会议>Symposium on biotechnology for fuels and chemicals >Heat Transfer Considerations in Design of a Batch Tube Reactor for Biomass Hydrolysis
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Heat Transfer Considerations in Design of a Batch Tube Reactor for Biomass Hydrolysis

机译：生物质水解批管反应器设计中的传热考虑

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摘要

Biologic conversion of inexpensive and abundant sources of cellulosic biomass offers a low-cost route to production of fuels and commodity chemicals that can provide unparalleled environmental, economic, and strategic benefits. However, low-cost, high-yield technologies are needed to recover sugars from the hemicellulose fraction of biomass and to prepare the remaining cellulose fraction for subsequent hydrolysis. Uncatalyzed hemicellulose hydrolysis in flow-through systems offers a number of important advantages for removal of hemicellulose sugars, and it is believed that oligomers could play an important role in explaining why the performance of flow-through systems differs from uncatalyzed steam explosion approaches. Thus, an effort is under way to study oligomer formation kinetics, and a small batch reactor is being applied to capture these important intermediates in a closed system that facilitates material balance closure for varying reaction conditions. In this article, heat transfer for batch tubes is analyzed to derive temperature profiles for different tube diameters and assess the impact on xylan conversion. It was found that the tube diameter must be <0.5 in. for xylan hydrolysis to follow the kinetics expected for a uniform temperature system at typical operating conditions.
机译：纤维素生物量的廉价和丰富来源的生物转化提供了燃料和商品化学品的低成本途径，可以提供无与伦比的环境，经济和战略效益。然而，需要低成本，高产技术来从生物质的半纤维素部分中回收糖，并制备剩余的纤维素级分，以便随后的水解。流通系统中未造化的半纤维素水解提供了一些可用于去除半纤维素糖的重要优势，并且据信寡聚物可以在解释原理的原因与未造化的蒸汽爆炸方法不同的原因中起重要作用。因此，正在进行努力研究低聚物形成动力学，并且施加小的批量反应器以捕获这些重要的中间体在闭合系统中，该闭合系统促进用于改变反应条件的材料平衡闭合。在本文中，分析了批料管的传热，以导出不同管直径的温度曲线，并评估对木聚糖转化的影响。发现管直径必须<0.5英寸。对于Xylan水解，以遵循典型的操作条件下均匀温度系统的动力学。

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