逼近玉米乙醇指标的先进纤维素乙醇技术

Advanced cellulosic ethanol technology with the completing technical and technoeconomic levels to corn ethanol

纤维素乙醇产业化的唯一出路是降低综合生产成本至玉米乙醇的盈利水平,实现对玉米乙醇的替代。目前纤维素乙醇技术已经到了一个技术突破和产业化应用的拐点。最先进的纤维素乙醇技术的各项技术指标以及关键的废水排放指标已经接近成熟的玉米乙醇技术水平,并产生大量盈余电力上网。纤维素乙醇的综合生产成本也已经与玉米乙醇接近,具备了与玉米乙醇进行市场竞争的潜力。我国的纤维素乙醇产业化仍然面临着诸如原料收集供应模式不成熟、投资门槛高、工程实践不足等严峻挑战。

The only way of cellulosic ethanol commercialization is to replace corn ethanol on the biofuel market by the advanced biorefi ning technology with the competing technical and techno-economic levels. The current cellulosic ethanol production technology is approaching a breakthrough point both technically and economically. The current bioconversion yield and the wastewater output of the advanced cellulosic ethanol technology are close to that of the mature corn ethanol technology. The energy balance is also achieving a large surplus by electricity generation. The rigorous techno-economic evaluation shows that the cellulosic ethanol has the strong competing performance to corn ethanol because its overall cost is approaching that of corn ethanol. However,the full scale commercialization of cellulosic ethanol in China still faces the severe challenge such as feedstock collection system,high investment and insuffi cient commercial practices.