Oxygen Carrier and Alkali Interaction in Chemical Looping Combustion: Case Study Using a Braunite Mn Ore and Charcoal Impregnated with K<sub>2</sub>CO<sub>3</sub> or Na<sub>2</sub>CO<sub>3</sub>

木炭 活性炭 燃烧 化学链燃烧 集聚经济 碱金属 化学 化学工程 氧气 固体燃料 合成气 吸附 材料科学 有机化学 催化作用 工程类
作者
Daofeng Mei,Anders Lyngfelt,Henrik Leion,Carl Linderholm,Tobias Mattisson
出处
期刊:Energy & Fuels [American Chemical Society]
卷期号:36 (17): 9470-9484 被引量:2
标识
DOI:10.1021/acs.energyfuels.2c00553
摘要

Alkali is a problematic component in biomass and may create various operation issues in normal combustion as well as chemical looping combustion using biomass fuels (bio-CLC). To investigate the interaction of alkali with an oxygen carrier, a methodology has been developed where alkali salts are added with impregnated charcoal particles. This work studies the effect of K2CO3 and Na2CO3 on the fluidization/agglomeration behavior and reactivity as well as the interaction of a braunite manganese ore oxygen carrier with K and Na in a batch fluidized bed reactor. Charcoal impregnated with K2CO3 (K-charcoal) and charcoal impregnated with Na2CO3 (Na-charcoal) were used as solid fuels in the reduction step of the simulated CLC cycles. CH4 and syngas (50% CO + 50% H2) were periodically used to evaluate the reactivity of braunite before and after solid fuel experiments. In total, more than 50 cycles were performed for both K-charcoal series and Na-charcoal series tests, while some additional cycles with non-impregnated charcoal were conducted and considered as a reference. Partial agglomeration and partial defluidization were found after cycles with K-charcoal and Na-charcoal, and the use of K-charcoal tends to lead to the partial agglomeration/defluidization faster than the use of Na-charcoal. K, Na, Si, and Ca were found at a higher concentration on the surface of the agglomerated particles and can be assumed to be responsible for the partial agglomeration. The partial agglomeration with K-charcoal happened likely as a result of surface melting of the braunite particles, whereas the formation of the low-melting-point Na–Si–Ca system could be responsible for agglomeration in the Na-charcoal experiments. The concentration of K and Na in the braunite bed was found to increase during cycles with the alkali charcoals. In total, the added masses of K and Na were 0.8 and 1.2% of the bed, and around 40 and 80% of added K and Na were found, respectively, in the used oxygen carrier particles. Although partial agglomeration and accumulation were observed in the presence of these alkalis, the reactivity of used braunite was scarcely changed in comparison to the fresh sample.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
怕黑紫伊发布了新的文献求助30
刚刚
1秒前
2秒前
benzene完成签到 ,获得积分10
2秒前
3秒前
Qsss发布了新的文献求助10
3秒前
gaogao完成签到,获得积分10
4秒前
kk子发布了新的文献求助10
5秒前
5秒前
Lucas应助SSE采纳,获得10
6秒前
范范发布了新的文献求助10
7秒前
7秒前
我爱吃菜完成签到,获得积分10
8秒前
8秒前
赎罪完成签到 ,获得积分10
9秒前
Qsss完成签到,获得积分10
10秒前
ya发布了新的文献求助10
10秒前
10秒前
练得身形似鹤形完成签到 ,获得积分10
11秒前
11秒前
11秒前
12秒前
鹿港猫妖完成签到,获得积分20
13秒前
chen完成签到,获得积分10
13秒前
14秒前
阿湫发布了新的文献求助10
14秒前
14秒前
15秒前
崔悦欣发布了新的文献求助10
15秒前
希望天下0贩的0应助kk子采纳,获得10
16秒前
丰富的不惜完成签到,获得积分10
18秒前
票子发布了新的文献求助10
18秒前
华仔应助魏莱采纳,获得10
18秒前
F123发布了新的文献求助10
19秒前
shen发布了新的文献求助10
20秒前
20秒前
苗觉觉完成签到,获得积分10
21秒前
帕金森完成签到,获得积分10
22秒前
活力的妙芙完成签到,获得积分10
22秒前
赘婿应助疯子魔煞采纳,获得10
23秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038446
求助须知:如何正确求助?哪些是违规求助? 3576149
关于积分的说明 11374627
捐赠科研通 3305875
什么是DOI,文献DOI怎么找? 1819354
邀请新用户注册赠送积分活动 892680
科研通“疑难数据库(出版商)”最低求助积分说明 815048