水洗预处理对花生壳热解特性及产物的影响  

Effects of water washing pretreatment on pyrolysis properties and products of peanut shell

作　　者：崔泽苹 李志合[1] 李宁[1] 刘元虎 王绍庆[1] 王丽红[1] Cui Zeping;Li Zhihe;Li Ning;Liu Yuanhu;Wang Shaoqing;Wang Lihong(School of Agricultural Engineering and Food Science,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学农业工程与食品科学学院,山东淄博255000

出　　处：《可再生能源》2018年第10期1431-1436,共6页Renewable Energy Resources

基　　金：山东省自然科学基金项目(ZR2017MEE004);山东省自然科学基金三院联合基金项目(ZR2016YL012)

摘　　要：文章以花生壳及其水洗样为研究对象,采用SEM,XRF方法研究了花生壳水洗前后碱金属及碱土金属含量的变化,并利用水平管式炉在450,550,650℃下对花生壳进行热解实验。实验结果表明:水洗预处理能够去除花生壳中的部分金属元素,降低灰分含量,并提高花生壳的热值;水洗预处理能够使花生壳热解失重峰值温度向高温区移动,并提高热解速率和生物油产率;碱金属的去除有利于糖类、醛类以及酮类物质的产生,碱金属的去除还能够抑制大分子物质(醇类、酚类等)的进一步裂解。In this paper, the peanut shell was washed with deionized water, the original and demineralized samples were pyrolyzed in a fixed bed reactor under 450,550,650 ℃. The alkali and alkaline earth metallic（AAEMs） composition and surface structure of before and after pretreatment were analyzed by scanning electron microscope（SEM） and X Ray Fluorescence（XRF）. The results indicatrs that water leaching can effectively remove AAEMs and reduce ash content of biomass. Simultaneously, compared with original sample, leaching pretreatment increases the pyrolysis temperature and improves the contents of sugars, aldehydes and ketones.Nevertheless, the removal of AAEMs inhabits the further decomposition of phenols and alcohols.

关 键 词：花生壳 水洗 热重分析 生物油 

分 类 号：TK6[动力工程及工程热物理—生物能]