玉米秸秆在乙醇/水混合溶剂中液化制生物油的研究

在间歇式高压反应釜中，在镍基催化剂NiMoS/Al₂O₃催化下研究了反应温度（180~340℃）对乙醇水蒸气重整制氢的影响，并以乙醇/水为混合溶剂，玉米秸秆为原料研究了其在混合溶剂下的直接液化行为。结果表明：在添加NiMoS/Al₂O₃催化剂的条件下，当反应温度提高到320℃时，乙醇水蒸气重整反应发生，伴随着CO、CO₂、CH₄、H₂和C_nH_m的产生，其中H₂产量最高为47 mmol，进一步提高温度至340℃，H₂产量增加到122 mmol。反应温度为340℃条件下，玉米秸秆液化油的收率由未添加催化剂时的21.26%增加到添加催化剂后的29.57%，热值由32.14 MJ/kg提高到33.89 MJ/kg。GC-MS分析得出生物油的主要成分为酚类、酯类和酮类，且添加催化剂后酚类的量下降了23%，有助于提高生物油稳定性。

Liquefaction of Corn Stover in Ethanol/Water Co-solvent for Bio-oil Production

The effect of temperature(180-340℃) on the ethanol steam reforming(ESR) with NiMoS/Al₂O₃ as catalyst was investigated in batch-type autoclave. The behavior of corn stover liquefaction in the ethanol-water co-solvent was studied. Results showed that the ESR occurred as the temperature increased to 320℃ with NiMoS/Al₂O₃, accompanied with the formation of CO, CO₂, CH₄, H₂ and C_nH_m, of which the H₂ yield was the highest(47 mmol). When the temperature was further increased to 340℃, the H₂ yield remarkably increased to 122 mmol. Compared to the non-catalytic runs, the yield and heating value(Q_HHV)of bio-oil obtained from corn stover liquefaction at 340℃ with NiMoS/Al₂O₃ as catalyst increased from 21.26% and 32.14 MJ/kg to 29.57% and 33.89 MJ/kg, respectively. GC-MS results showed that the main components of the bio-oil were phenolics, esters and ketones, and the phenolics content decreased by 23% after adding the catalyst, which was beneficial to increase the stability of bio-oil.