Abstract：
Hydrogen-ethanol co-production can significantly improve the energy conversion efficiency of corn stalk (CS). In this study, with CS as the raw material, the co-production characteristics of one-step and two-step photo-fermentation hydrogen production (PFHP) and ethanol production were investigated. In addition, the gas and liquid characteristics of the experiment were analyzed. The kinetics of hydrogen-ethanol co-production was calculated, and the economics of hydrogen and ethanol were analyzed. Results of the experiments indicated that the two-step hydrogen-ethanol co-production had the best hydrogen production performance when the concentration of CS was 25 g/L. The total hydrogen production was 350.08 mL, and the hydrogen yield was 70.02 mL/g, which was 2.45 times higher than that of the one-step method. The efficiency of hydrogen-ethanol co-production was 17.79 %, which was 2.76 times more efficient than hydrogen compared to fermentation with hydrogen. The result provides technical reference for the high-quality utilization of CS.
摘要：
氢-乙醇联产可以显著提高玉米秸秆(CS)的能量转化效率。在这项研究中,以CS为原料，研究了一步和两步光发酵产氢（PFHP）和乙醇生产的联产特性。此外,分析了实验的气液特性。计算了氢-乙醇联产的动力学，并对氢气和乙醇的经济性进行了分析。实验结果表明，当CS浓度为25g/L时，两步氢-乙醇联产的制氢性能最好。总氢气产量为350.08mL，氢气产率为70.02mL/g，是一步法的2.45倍。氢-乙醇联产效率为17.79%,与氢发酵相比，效率是氢发酵的2.76倍。研究结果为CS的优质利用提供了技术参考。
