脱除金属盐的芦苇热解特性实验研究

通过水洗和酸洗制备了脱除金属盐矿物质的芦苇,在热重分析仪中进行热解反应特性研究,考察了金属盐组分、金属盐洗脱率、生物质样品孔径分布、反应升温速率等因素对热解特性的影响。结果表明,不同洗脱方法对芦苇中金属盐矿物质和孔结构有明显影响,酸洗的洗脱效率达到了99.8%,矿物质原始位置在经过洗脱后形成新孔导致洗脱样的吸附量大于原样的吸附量,且随着矿物质的脱除程度增加,中孔所占的比例逐渐减小;提高升温速率,有利于芦苇和洗脱样的热解,加快生物质内的纤维素和半纤维素的热解反应。

Experimental Study on the Pyrolysis Characteristics of Demineralized Phragmites Australis

Based on washing and pickling, the Phragmites australis samples were prepared, and these characteristics of pyrolysis reaction were researched in thermogravimetric analyzer. The influence of reaction factors, such as the metal salt components, metal salt elution rate, biomass samples pore size distribution ,heating rate, on the pyrolysis characteristics was investigated. Results showed that, the demineralized methods had significant effects on minerals and the pore structure. The pickling effi- ciency was 99.8%. Original positions of minerals formed new holes after elution, thus leading to the adsorption quantity of elution sample greater than raw sample. With the demineralizing degree in- creasing,the mesopore proportion decreased gradually. Improving the heating rate was helpful for py- rolyzing of Phragmites australis raw samples and elution samples.