农业废弃物加氢热解联合挥发分催化加氢制燃料油  

Production of fuel oil from agricultural residues by hydropyrolysis integrated with volatile catalytic hydrogenation

作　　者：平济舟 邓云棋 王杰[1] PING Jizhou;DENG Yunqi;WANG Jie(Department of Chemical Engineering for Energy,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学能源化工系,上海200237

出　　处：《农业工程学报》2024年第15期164-173,共10页Transactions of the Chinese Society of Agricultural Engineering

基　　金：中国博士后科学基金资助项目(2016M601524)。

摘　　要：利用农业废弃物生产燃料油是“双碳”背景下富有吸引力和挑战性的课题。该研究在两段加压固定床反应器上进行了生物质加氢热解联合挥发分催化加氢转化试验,由生物质加氢热解(压力5.0 MPa、升温速率15℃/min、终温700℃)产生的挥发分通过NiMo-HZSM-5层进行催化加氢(压力5.0 MPa、温度320℃)实现生物油提质;研究了3种农业废弃物玉米秸秆、棉花秸秆和花生秸秆的产油特征,借助水洗和酸洗预处理的方法、并采用纤维素和木质素模型化合物考察了不同纤维组成的影响。结果得到,3种农业废弃物的催化加氢生物油产率为10.3%~15.9%,生物油中脂肪烃占比达73.0%~84.8%,几乎不存在含氧化合物和含氮化合物。3种农业废弃物经水洗后脱除部分中性溶解物后,其催化加氢生物油产率提高至18.1%~18.5%;经酸洗后主要残留纤维素和木质素,其催化加氢生物油产率相比水洗又有所提高。模型化合物的研究揭示,纤维素可获得产率较高的富含环戊烷、环己烷和十氢萘类脂环烃化合物的催化加氢生物油,而木质素的催化加氢生物油产率较低,倾向生成单环芳烃,也可生成环己烷和十氢萘类化合物,却不易生成环戊烷类化合物。该研究提供了利用农业废弃物高效生产燃料油的新技术途径。Agricultural residue is an important biomass resource in China.Utilization of agricultural residue for production of high-quality fuel oil is an attractive and challenging topic towards the goals of“Carbon Peaking and Carbon Neutrality”.Biomass hydropyrolysis integrated with volatile catalytic hydrogenation is a new process that can efficiently improve the yield and quality of bio-oil.This work is purposed to explore this new biomass conversion technology by laboratory experiments using a tandem pressurized fixed bed reactor.A bimetallic molecular sieve catalyst(NiMo-HZSM-5)was prepared by an impregnation method and used for catalytic hydrogenation.Biomass was hydropyrolyzed under a condition of 5 MPa H2 pressure,15℃/min heating rate and 700℃final temperature to generate volatile matter,which was online hydrogenated through the NiMo-HZSM-5 catalyst bed under a condition of 5 MPa H2 pressure,320℃reaction temperature and 26 s residence time(corresponding to space velocity of 112.5 h−1).The paper firstly presents the oil production results of three types of agricultural residue,corn stalk,cotton stalk and peanut straw by the catalytic hydrogenetion.The paper is then devoted to further clarifying the conversion characteristics of different biomass fiber constituents by means of the water washing and acid washing pretreatments of three agricultural residues as well as by adopting cellulose and lignin as model compounds.Results showed that in the case of non-catalytic hydrogenation,all of the bio-oils obtained from three agricultural residues contained oxygenates and aromatic hydrocarbons as two main classes of compounds,and that from peanut straw also contained a high proportion of nitrogenous compounds.In contrast,all of the bio-oils derived from three agricultural residues by the catalytic hydrogenation(CH bio-oils)contained almost neither oxygenates nor nitrogenous compounds.The yields of CH bio-oils reached 10.3%–15.9%for three agricultural residues.The CH-bio-oils were composed of 73.0–84.8%satura

关 键 词：农业 废弃物 纤维 生物油 加氢热解 催化加氢 

分 类 号：TK6[动力工程及工程热物理—生物能]