[1]周玉飞,沈来宏,顾海明,等.生物质灰对铁矿石载氧体性能的影响[J].东南大学学报(自然科学版),2015,45(3):503-508.[doi:10.3969/j.issn.1001-0505.2015.03.016]
 Zhou Yufei,Shen Laihong,Gu Haiming,et al.Effect of biomass ash on performance of iron ore as oxygen carrier in chemical looping combustion[J].Journal of Southeast University (Natural Science Edition),2015,45(3):503-508.[doi:10.3969/j.issn.1001-0505.2015.03.016]
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生物质灰对铁矿石载氧体性能的影响()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第3期
页码:
503-508
栏目:
能源与动力工程
出版日期:
2015-05-20

文章信息/Info

Title:
Effect of biomass ash on performance of iron ore as oxygen carrier in chemical looping combustion
作者:
周玉飞沈来宏顾海明牛欣
东南大学能源热转换及其过程测控教育部重点实验室, 南京 210096
Author(s):
Zhou Yufei Shen Laihong Gu Haiming Niu Xin
Key Laboratory of Energy Thermal Conversion Control of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
化学链燃烧 铁矿石 生物质灰 碱金属
Keywords:
chemical looping combustion iron ore biomass ash alkali metal
分类号:
TK546
DOI:
10.3969/j.issn.1001-0505.2015.03.016
摘要:
在小型固定床上以铁矿石为载氧体、CO为燃料,进行了化学链燃烧试验.通过在铁矿石中加入生物质灰,探讨了生物质灰的种类(玉米秆灰、油菜秆灰和稻草灰)、灰的添加量(5%~20%)及灰中碱金属对铁矿石载氧体反应活性的影响.试验结果表明:生物质灰中无机组分不同,对铁矿石载氧体反应活性的影响也不同.由于玉米秆灰和油菜秆灰中碱金属K含量较高,高温下K以气态形式迁移到铁矿石表面,生成了K3FeO2,从而提高了铁矿石的还原反应活性.稻草灰中Si含量很高,高温下碱金属K及FeO与铁矿石反应,生成低熔点共晶体,加剧了铁矿石表面的烧结,减少了气固反应的接触面积,导致CO总转化率急剧下降.
Abstract:
Experiment on chemical looping combustion was conducted in a fixed bed reactor with iron ore as oxygen carrier and CO as fuel. The effect of biomass ash addition on the performance of the iron ore oxygen carrier was investigated. Several key factors were discussed, including the biomass ash type(corn stalk ash, rape stalk ash, straw ash), the ash ratio(5% to 20%)and the alkali metal in the ash. The results indicate that the effect of the biomass ash on the reactivity of iron ore depends on the chemical composition of the ash. The alkali metal K abundant in corn ash and rape ash is released in gaseous state and captured by iron ore through complicated reactions, forming K3FeO2 which enhances the reduction reactivity of the iron ore. However, the high content of Si in the straw ash leads to a reaction of Si with K and FeO under high temperature to form low melting point compounds which causes serious sintering on the surface of the iron ore. The decrease of contact surface causes the decrease of the total CO conversion.

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备注/Memo

备注/Memo:
收稿日期: 2014-11-21.
作者简介: 周玉飞(1990—),男,硕士生;沈来宏(联系人),男,博士,教授,博士生导师,lhshen@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51276037,51476029,51406035)、中国博士后科学基金资助项目(2014M551489).
引用本文: 周玉飞,沈来宏,顾海明,等.生物质灰对铁矿石载氧体性能的影响[J].东南大学学报:自然科学版,2015,45(3):503-508. [doi:10.3969/j.issn.1001-0505.2015.03.016]
更新日期/Last Update: 2015-05-20