反应分离耦合制备燃料乙醇研究进展

发展燃料乙醇可以降低对化石燃料的依赖,减少由化石资源的使用所带来的环境污染。然而传统的燃料乙醇发酵生产过程中存在严重的产物抑制现象,不仅限制发酵原料的糖化,还制约燃料乙醇生产强度的提高,不利于无水乙醇制取过程的节能降耗。乙醇发酵与产物分离耦合技术是解决这一难题的有效方法。该技术可以实现高浓度底物发酵或酶转化,减轻或消除产物对生物催化剂的毒害作用,提高反应速率,获取高浓度产物;还可以简化产物分离过程、降低产物分离所产生的能耗、降低生产成本。对此,本文总结了各种乙醇发酵与产物分离耦合技术,并比较其优劣,最后展望了乙醇发酵与产物分离耦合技术的前景。

Progresses in Production of Fuel Ethanol by Coupling Reaction and Separation

Nowadays, countries all over the world develop fuel ethanol in order to decreae the dependent on fossil resources and environmental pollution. However, there is serious product inhibition in the traditional production process, which not only limits the saccharification, but also restricts the increment of the strength of fuel ethanol production, and is not favorable to the energy saving.Coupling of ethanol fermentation with product separation, especially ethanol fermentation and membrane separation could effectively solve the problem.This technology can perform the fermentation of high concentration substrates or enzymatic conversion, reduce or eliminate the toxicity of products to biological catalysts, improve the reaction rate, and obtain high concentration products.It also can simplify the product separation process, and reduce the energy consumption of product separation and production cost.This paper introduced and compared the various integrated bioreaction-seperation processes, and finally forecasted their prospect.