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高学艺,冯晓飞,王克冰. 碱土金属和沙柳对煤热解过程中协同作用的影响[J]. 科学技术与工程, 2020, 20(1): 202-206.
GAO Xue-yi,FENG Xiao-fei.Synergistic Effect of Alkali Metals and Biomass on Coal Pyrolysis[J].Science Technology and Engineering,2020,20(1):202-206.
碱土金属和沙柳对煤热解过程中协同作用的影响
Synergistic Effect of Alkali Metals and Biomass on Coal Pyrolysis
投稿时间:2019-04-20  修订日期:2019-09-13
DOI:
中文关键词:  生物质    混合热解  协同性  氧化钙
英文关键词:biomass  coal  mixed pyrolysis  Synergistic  calcium
基金项目:国家自然科学基金资助项目(21366018)内蒙古自治区高校科学研究项目(NJZY17063)
        
作者单位
高学艺 内蒙古农业大学理学院
冯晓飞 内蒙古农业大学理学院
王克冰 内蒙古农业大学理学院
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中文摘要:
      利用热重微差分析仪对碱土金属和沙柳对宝矿煤热解过程中的协同作用进行了探究。研究表明:当宝矿煤中加入沙柳时,在200-600℃区间内,宝矿煤热解初温降低,热解区间变小,最大失重速率增加,失重比例增加;而在600℃以上时,沙柳对宝矿煤热解无明显影响。当宝矿煤中加入氧化钙时,在200-600℃区间内宝矿煤热解初温无明显变化,但最大失重速率增加,且随氧化钙的比例增加,其变化效果越明显;在600℃以上时,氧化钙的加入可以进一步促进宝矿煤的热解,但氧化钙占比改变,对宝矿煤的热解区间,最大失重速率影响不大。将热力学数据按照Coast-Redfern积分法进行动力学拟合,其符合一级反应动力学模型,当在宝矿煤中加入氧化钙与沙柳后,可以显著降低宝矿煤的热解活化能。且随着氧化钙比例增加,活化能逐渐降低,指前因子变得更小,表明氧化钙和沙柳均对宝矿煤的热解过程产生了协同作用。
英文摘要:
      The effects of alkali metals and biomass on BK coal pyrolysis were investigated by thermogravimetric millisecond balance. The experimental results showed that when Salix is added to the coal mine,the maximum weight loss rate increases,and the weight loss ratio increases in the range of 200-600℃,while at more than 600℃,the Salix has no obvious effect on the pyrolysis of the coal. When calcium oxide is added,there is no obvious change in the initial temperature of the coal pyrolysis in the range of 200-600 ℃,but the maximum weight loss rate increases, and the effect is more obvious with the increase in the proportion of CaO. At above 600℃,the addition of calcium oxide can promote the continued pyrolysis of the coal mine,but the proportion of calcium oxide has little effect on the maximum weight loss rate and the pyrolysis interval. By the Coast-Redfern integral method,the data of combustion were analyzed. It conforms to the first order reaction kinetics model. It was found that adding calcium oxide and Salix into coal could significantly reduce the activation energy of Baokuang coal pyrolysis. With the increase of the proportion of calcium oxide, the activation energy gradually decreased, and the pre-exponential factor became smaller, indicating that both calcium oxide and Salix had synergistic effect on the pyrolysis process of the coal.
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