Mechanisms of gas generation from conventional and microwave pyrolysis of coal slime

热解 tar(计算) 化学 合成气 微波食品加热 化学工程 燃烧热 分解 热分解 烧焦 有机化学 分析化学(期刊) 燃烧 催化作用 工程类 物理 程序设计语言 量子力学 计算机科学
作者
Lei Ren,Fei Wang,Fangqin Cheng,Fengling Yang,Qian Zhang
出处
期刊:Chemical Engineering Journal [Elsevier]
卷期号:452: 139388-139388 被引量:31
标识
DOI:10.1016/j.cej.2022.139388
摘要

Microwave pyrolysis can efficiently achieve the clean upgrading of solid waste value fuels, such as coal slime (CS). However, the mechanism of pyrolysis gas release remains unclear. This study investigated the effects of the pyrolysis temperature and methods on pyrolysis gas generation. The results demonstrated that microwave pyrolysis exhibited a higher percentage of gas phase and a lower percentage of liquid phase and promoted the generation of pyrolysis gas, while inhibiting the formation of tar compared to conventional pyrolysis. The gas composition was quantified by micro gas chromatography, and kinetic calculations revealed that microwaves decreased the activation energy of H2 and CO generation by 23.74% and 36.01%, respectively, and the release of H2 and CO increased. The analysis of tar by gas mass spectrometry revealed that microwaves can reduce secondary reactions and promote the transfer of oxygen-containing functional groups to the liquid phase. The increase in temperature further stimulated the cyclization and condensation of tar, leading to the transfer of numerous H and O radicals in tar to the gas phase, as more H2 and CO were released. This is further explained in terms of heat and mass transfer. Density functional theory calculations of the R-COO-R' reaction pathway showed that microwaves could generate tremendous energy to promote the thermal decomposition of ester groups in tar, generating more H2 and CO. Therefore, a possible reaction path for generating H2 and CO by the thermal decomposition of CS under microwave intensification is proposed, which provides a feasible idea for the efficient quality improvement of CS.
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
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
xuex1完成签到,获得积分10
刚刚
情怀应助阳光的雁山采纳,获得10
2秒前
斯文败类应助jy采纳,获得10
2秒前
2秒前
日月轮回发布了新的文献求助10
3秒前
36456657应助木香采纳,获得10
4秒前
无花果应助ns采纳,获得30
4秒前
刘铭晨完成签到,获得积分10
4秒前
5秒前
YY发布了新的文献求助10
5秒前
Rrr发布了新的文献求助10
6秒前
学术蠕虫发布了新的文献求助10
6秒前
6秒前
miumiuka完成签到,获得积分10
7秒前
个性的薯片应助lyt采纳,获得20
9秒前
sweetbearm应助寒涛先生采纳,获得10
10秒前
wanci应助YY采纳,获得10
11秒前
11秒前
12秒前
12秒前
13秒前
HC完成签到 ,获得积分10
14秒前
姚姚的赵赵完成签到,获得积分10
14秒前
JamesPei应助大豪子采纳,获得30
15秒前
jy发布了新的文献求助10
15秒前
15秒前
陆靖易发布了新的文献求助10
15秒前
LQW完成签到,获得积分20
16秒前
17秒前
plant完成签到,获得积分10
17秒前
lyt完成签到,获得积分10
17秒前
18秒前
19秒前
敏感网络完成签到,获得积分20
20秒前
kh453发布了新的文献求助10
20秒前
20秒前
子爵木完成签到 ,获得积分10
20秒前
HC发布了新的文献求助30
21秒前
无限鞅发布了新的文献求助10
21秒前
SherlockLiu完成签到,获得积分20
21秒前
高分求助中
Continuum Thermodynamics and Material Modelling 3000
Production Logging: Theoretical and Interpretive Elements 2700
Social media impact on athlete mental health: #RealityCheck 1020
Ensartinib (Ensacove) for Non-Small Cell Lung Cancer 1000
Unseen Mendieta: The Unpublished Works of Ana Mendieta 1000
Bacterial collagenases and their clinical applications 800
El viaje de una vida: Memorias de María Lecea 800
热门求助领域 (近24小时)
化学 材料科学 生物 医学 工程类 有机化学 生物化学 物理 纳米技术 计算机科学 内科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 量子力学 光电子学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3527928
求助须知:如何正确求助?哪些是违规求助? 3108040
关于积分的说明 9287614
捐赠科研通 2805836
什么是DOI,文献DOI怎么找? 1540070
邀请新用户注册赠送积分活动 716904
科研通“疑难数据库(出版商)”最低求助积分说明 709808