蓝藻水热碳化制备固体燃料:燃料特性及燃烧行为  

Fuel properties and combustion behavior of solid fuel prepared from blue-green algae through hydrothermal carbonization

作　　者：周海云 张琳[2] 王伟霞 徐振佳 袁思佳 鲍业闯 姚烘烨 赵培涛[2] ZHOU Haiyun;ZHANG Lin;WANG Weixia;XU Zhenjia;YUAN Sijia;BAO Yechuang;YAO Hongye;ZHAO Peitao(Jiangsu Environmental Engineering Technology Co.,Ltd.,Nanjing 210019,Jiangsu,China;School of Low-Carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]江苏省环境工程技术有限公司,江苏南京210019 [2]中国矿业大学低碳能源与动力工程学院,江苏徐州221116

出　　处：《低碳化学与化工》2025年第3期82-88,共7页Low-Carbon Chemistry and Chemical Engineering

基　　金：江苏省科技项目(BE2021627,BE2022604);江苏省生态环境科研项目(2022003);江苏省环保集团科技项目(JSEP-TZ-2021-2008-RE,JSEP-TZ-2022-1008-RE)。

摘　　要：蓝藻含水率高达99%以上,采用热解等热化学处理方法时需要对蓝藻进行干燥预处理,能耗极高。针对该问题,对含水率92.94%的蓝藻进行水热碳化(HTC)处理,研究了水热温度(180~260℃)、保温时长(0~3 h)和升温速率(1℃/min和1℃/6 min)对水热炭燃料特性及燃烧行为的影响。结果表明,通过水热碳化处理,蓝藻挥发分含量降低了9.92%~29.13%,灰分含量提高了8.54%~25.52%,固定碳含量提高了0.82%~5.26%。蓝藻水热炭燃烧可分为干燥脱水、挥发分脱除以及挥发分和固定碳燃烧3个阶段。水热碳化处理提高了蓝藻的着火温度(505~583 K)和燃尽温度(747~812 K),更加有利于蓝藻储存和运输。动力学分析结果表明,挥发分脱除及其燃烧阶段为一级反应,活化能为27.82~66.04 kJ/mol;固定碳燃烧阶段为二级反应,活化能为38.65~65.68 kJ/mol。本研究可为蓝藻资源化利用提供参考。The moisture content of blue-green algae is over 99%.when using thermochemical treatment methods such as pyrolysis,it is necessary to dry and pretreat the blue-green algae,which consumes a high amount of energy.To address this issue,hydrothermal carbonization(HTC)was applied to blue-green algae with a moisture content of 92.94%.The effects of hydrothermal temperature(180℃to 260℃),holding time(0 h to 3 h),and heating rate(1℃/min and 1℃/6 min)on the fuel properties and combustion behavior of the resultant hydrochar were studied.The results indicate that HTC treatment reduces the volatile content of algae by 9.92%to 29.13%,increases ash content by 8.54%to 25.52%,and enhances fixed carbon content by 0.82%to 5.26%.Combustion of hydrochar from blue-green algae occurs in three stages:dehydration,volatile release,and combustion of volatiles and fixed carbon.HTC treatment elevates the ignition temperature(505 K to 583 K)and burnout temperature(747 K to 812 K),which improves the storage and transport properties of the material.Kinetic analysis shows that the volatile release and its combustion stage follows a first-order reaction with an activation energy of 27.82 kJ/mol to 66.04 kJ/mol,while the fixed carbon combustion stage follows a second-order reaction with an activation energy of 38.65 kJ/mol to 65.68 kJ/mol.This study provides a reference for the resource utilization of blue-green algae.

关 键 词：蓝藻 水热碳化 水热炭 燃料特性 动力学分析 

分 类 号：TQ038[化学工程] X71[环境科学与工程—环境工程] O642.3[理学—物理化学]