市政污泥热解制备生物炭实验研究  

Experimental study for preparing biochar by pyrolysis of municipal sludge

作　　者：袁浩然[1,2] 鲁涛[1,2] 黄宏宇[1,2] 王亚琢[1,2] 邢世友[1,2] 熊祖鸿[1,2] 陈勇[1,2] 

机构地区：[1]中国科学院广州能源研究所,广东广州510640 [2]中国科学院天然气水合物与可再生能源重点实验室,广东广州510640

出　　处：《化工学报》2012年第10期3310-3315,共6页CIESC Journal

基　　金：国家重点基础研究发展计划项目(2011CB201501);中国科学院知识创新工程重要方向项目(KSCX2-EW-G-1-5);广东省中科院全面战略合作项目(2010A090100035)~~

摘　　要：引言生物炭是有机物质在缺氧或贫氧气氛下经热裂解过程产生的固体产物,目前对生物炭的研究兴趣源于对亚马逊盆地黑土（Terra Preta）的认识,亚马逊盆地黑土含有丰富的生物炭,多年耕种后,仍保持持久肥力。研究表明,生物炭是稳定的碳载体,在土壤中可保持长达百年至千年之久,土壤中施用生物炭可提高土壤中有机碳以及腐殖质含量,从而提高土壤的养分吸持容量及持水容量。The experiment for preparation of biochar by pyrolysis of municipal sludge was carried out in a tube furnace reactor at 300—700℃.The results show that with increasing temperature from 300℃ to 700℃,yield of biochar decreases from 90.14% to 73.36%,yield of fixed-carbon fluctuates slightly between 8.76%—12.01%,and efficiency of energy conversion decreases from 75.9% to 28.5%.The concentration of all heavy metals in municipal sludge feed and biochar obtained could meet the requirement for agricultural use.The pyrolysis temperature has large influence on volatility of Hg and Cr,and little influence on that of other heavy metals;the residual ratio fluctuates widely for Hg and Cr,and is at high level for Cu,Ni,As,Pb,Zn and Cd.There is no enrichment in biochar for nutrient element nitrogen,while both phosphorus and potassium are enriched in biochar.There is need for further investigation on how to prepare biochar and make it suitable for agricultural use.

关 键 词：市政污泥 热解 生物炭 重金属 营养元素 

分 类 号：TQ530.2[化学工程—煤化学工程]