摘要
将乙醇与污泥加入到高压反应釜中,利用乙醇的超临界特性和供氢性,实现污泥的液化制油反应,然后分别利用真空抽滤装置和旋蒸装置提取渣产物和油产物。主要考察反应温度、停留时间、污泥添加量及催化剂对产油率的影响。研究发现,当反应温度290℃,停留时间60 min,污泥/乙醇的固液比为1/20时油产率最高,且加入氢氧化钠时油产率可提升至45. 5%。通过分析发现,液化油中C元素含量比污泥原料提升了105. 8%,H元素含量相比提升了71. 8%,O元素含量则大幅降低,液化油的热值比污泥高20. 12 MJ/kg。液化油中各组分的碳链集中在C16～C20,主要为酯类,占56. 36%,而烷烃类化合物含量较低,仅为6. 32%,后续应对酯类化合物进行脱氧来进一步提升油品质。
Ethanol and sludge were added into a high-pressure reactor to realize the liquefaction of sludge to oil by using the supercritical characteristics and hydrogen supply of ethanol. Then the residue and oil products were extracted by vacuum filter and rotary distillation, respectively. The effects of reaction temperature, residence time, sludge addition and catalyst type on the oil production rate have been investigated. It was found that when the reaction temperature is 290 ℃, the residence time is 60 min and the solid-liquid ratio of sludge / ethanol is 1/20, the oil yield is the highest and can be increased to 45.5% when sodium hydroxide is added. According to the analysis of the liquefied oil, the content of C element is increased by 105.8%, the content of H element is increased by 71.8%, the content of O element is greatly reduced, and the calorific value of the liquefied oil is 20.12 MJ/kg higher than that of the sludge. The carbon chain of each component in liquefied oil is concentrated in C16-C20, mainly esters, accounting for 56.36%, while the content of alkanes is low, only 6.32%. The esters should be deoxidized to further improve oil quality.
作者
王学生
陈晓烜
陈琴珠
刘炼
WANG Xuesheng;CHEN Xiaoxuan;CHEN Qinzhu;LIU Lian(School of Mechanical and Power Engineering, East China University of Science and Technology,Shanghai 200237, China)
出处
《实验室研究与探索》
CAS
北大核心
2019年第3期77-80,共4页
Research and Exploration In Laboratory
关键词
制革污泥
超临界
直接液化
制油
tannery sludge
supercritical
direct liquefaction
oil production
