摘要
通过扫描电镜和氮吸附表征手段，分析了苏州河河道底泥负载钾基新型CO2吸收剂的微观形貌、比表面积、孔径与孔容．在升温速率为1，5，10，15和20K／min条件下，对CO2吸收剂进行了模拟再生试验，获得了相关的再生特性参数，并利用非等温热分析动力学方法研究了吸收剂的再生反应特性．结果表明：吸收剂的再生反应起始温度为385．9～388．7K，终止温度为486．4～491．0 K，最佳升温速率为10～15K／min，反应活化能为101．5～109．1kJ／mol；化学反应步骤是影响吸收剂再生的主要因素，活化能与指前因子之间的补偿参数a=0.517，b=-31．075，并给出了再生反应机理函数．试验所得结果为设计和运行CO2捕获工艺提供了基础数据．
With scanning electron microscopy（SEM） and N2 adsorption tests micro-morphology, specific surface area, pore volume and the distribution of pore diameters of potassium-based Souzhou river sediment sorbents for CO2 capture were studied. The regeneration tests of potassium-based sorbents were processed in the heating rate of 1, 5, 10, 15 and 20 K/min, and some concerned parameters of regeneration reaction were obtained. Besides, the regeneration reaction characteristics of potassium-based sediment sorbents were achieved by nonisothermal kinetics. Results indicated that the initial temperature and final temperature of regeneration reaction ranged from 385.9 K to 388.7 K and 486.4 K to 491.0 K respectively, the optimum heating rate ranged from 10 K/min to 15 K/min, the reaction process was the main factor which influenced regeneration of potassium-based sorbents, and the regeneration activation energy ranged from 101.5 kJ/mol to 109. 1 kJ/mol in the different heating rate. The compensation parameters between the activation energy and the pre-exponential factor are a and b, a = 0. 517, b = - 31. 075. The regeneration reaction mechanism function was achieved as well. The experimental results can be used as basic data for designing and operating a large scale CO2 capture process.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第5期662-667,共6页
Journal of Donghua University(Natural Science)
关键词
底泥钾基吸收剂
CO2捕获
再生反应
活化能
potassium-based sediment sorbents
CO2 capture
regeneration reaction
activation energy
