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首页> 外文会议>22th Symposium on Biotechnology for Fuels and Chemical, 22th, May 7-11, 2000, Gatlinburg, Tennessee >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：生物质水解间歇式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：廉价而丰富的纤维素生物质来源的生物转化为燃料和商品化学品的生产提供了一条低成本途径，可以提供无与伦比的环境，经济和战略利益。然而，需要低成本，高产率的技术以从生物质的半纤维素级分中回收糖并制备剩余的纤维素级分以用于随后的水解。流通系统中未催化的半纤维素水解为去除半纤维素糖提供了许多重要的优势，据信，低聚物可以在解释流通系统的性能为何不同于未催化的蒸汽爆炸方法中发挥重要作用。因此，正在进行研究低聚物形成动力学的努力，并且正在使用小批量反应器以在封闭的系统中捕获这些重要的中间体，该封闭的系统有利于针对各种反应条件进行物料平衡的封闭。在本文中，分析了分批管的传热，以得出不同管径的温度曲线，并评估了对木聚糖转化率的影响。已经发现，为了使木聚糖水解以遵循在典型操作条件下均匀温度系统所期望的动力学，管直径必须<0.5 in.。

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