Real-Time Emission, Chemical Properties, and Dynamic Evolution Mechanism of Volatile Organic Compounds during Co-Pyrolysis of Rice Straw and Semi-Bituminous Coal

热解 不饱和度 热重分析 酚类 化学 碳纤维 苯酚 质谱法 材料科学 有机化学 色谱法 无机化学 复合材料 复合数
作者
Tingting Li,Fanhao Song,Yingchen Bai,Fengchang Wu,Mingqi Ruan,Yuhan Cao,Lingfeng Zhou,Fuhong Sun
出处
期刊:ACS ES&T engineering [American Chemical Society]
卷期号:3 (5): 690-705 被引量:4
标识
DOI:10.1021/acsestengg.2c00391
摘要

The co-pyrolysis of biomass–coal blends improves energy utilization efficiency; however, the synergistic mechanisms behind thermal degradation and volatile formation remain unclear. We combined online thermogravimetry–Fourier transform infrared spectrometry–gas chromatography/mass spectrometry (TG–FTIR–GC/MS), Gaussian deconvolution, and two-dimensional correlation spectrometry (2D-COS) to reveal the component degradation, sequential response, and evolution mechanism of volatiles during co-pyrolysis of rice straw (RS) and semi-bituminous coal (SBC), which were mixed in three proportions of 1:3, 1:1, and 3:1. The activation energies (24.70–53.43 kJ mol–1) and preexponential factors (44.67–7663.43 min–1) for decomposition and average emission intensity coefficient (EIC) (0.06–0.12) of volatiles exhibited significant heterogeneity and were highly dependent on pyrolysis temperature and blend proportion. The EIC values of phenols/esters, alcohols/ethers, ketones, aldehydes, and acids increased with increasing RS proportion. The volatile distribution of blends with high SBC proportions was mainly located in the decarbonylation/dehydration reaction region. Moreover, the volatile organic compound (VOC) and intermediate VOC percentages were 59–83 and 17–39%, respectively, with N-containing species contributing the most to the intermediate VOC fraction. Most of the volatiles mainly exhibited reducing character, with average carbon oxidation state below zero. An increase in the proportion of RS and SBC contributed to high unsaturation and small carbon skeletons of volatiles, respectively. Notably, the primary sequential temperature response of volatiles was hydrocarbons, alcohols/phenols/ethers/esters, and (aldehydes/ketones/acids, aromatics), in that order. Furthermore, we proposed a novel synergistic mechanism to demonstrate that the heterogeneous degradation of RS/SBC components contributed significantly to the dynamic formation of volatiles during the co-pyrolysis process. These novel insights into the mechanisms of biomass–coal co-pyrolysis are useful for energy optimization and pollution control.
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
Nemo完成签到 ,获得积分10
刚刚
2秒前
5秒前
英勇海完成签到 ,获得积分10
7秒前
maxthon完成签到,获得积分10
7秒前
七里香完成签到 ,获得积分10
8秒前
虚心醉蝶完成签到 ,获得积分10
13秒前
ZhiyunXu2012完成签到 ,获得积分10
14秒前
FashionBoy应助科研通管家采纳,获得10
15秒前
桐桐应助科研通管家采纳,获得10
16秒前
许鸽应助科研通管家采纳,获得30
16秒前
搜集达人应助科研通管家采纳,获得10
16秒前
赘婿应助科研通管家采纳,获得10
16秒前
感动满天完成签到,获得积分10
16秒前
Nick完成签到 ,获得积分0
18秒前
19秒前
20秒前
小事完成签到 ,获得积分10
21秒前
听闻韬声依旧完成签到 ,获得积分10
25秒前
沐沐心完成签到 ,获得积分10
27秒前
HHW完成签到,获得积分10
35秒前
sdbz001完成签到,获得积分0
36秒前
40秒前
42秒前
王士钰完成签到,获得积分10
43秒前
慕容飞凤完成签到,获得积分10
44秒前
张大侠发布了新的文献求助10
45秒前
xbb88发布了新的文献求助10
46秒前
慎之完成签到 ,获得积分10
47秒前
语恒完成签到,获得积分10
47秒前
莫林在发布了新的文献求助60
47秒前
alixy完成签到,获得积分10
48秒前
golfgold完成签到,获得积分10
49秒前
桐桐应助与枫采纳,获得10
49秒前
h w wang完成签到,获得积分10
51秒前
叶问夏完成签到 ,获得积分10
51秒前
目土土完成签到 ,获得积分10
53秒前
无尘完成签到 ,获得积分10
56秒前
体贴的叛逆者完成签到,获得积分10
56秒前
17852573662完成签到,获得积分10
56秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
Immigrant Incorporation in East Asian Democracies 600
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 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 3968559
求助须知:如何正确求助?哪些是违规求助? 3513391
关于积分的说明 11167370
捐赠科研通 3248808
什么是DOI,文献DOI怎么找? 1794465
邀请新用户注册赠送积分活动 875116
科研通“疑难数据库(出版商)”最低求助积分说明 804664