Co-pyrolysis characteristics of coal and biomass at medium-high temperatures

JIN Kanghua; ZHANG Kang; JI Yinfei; LYU Hongkun; HAN Gaoyan; LIU Yingzu

doi:10.19666/j.rlfd.201911275

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Co-pyrolysis characteristics of coal and biomass at medium-high temperatures

更新时间：2025-09-28

- Co-pyrolysis characteristics of coal and biomass at medium-high temperatures
- Thermal Power Generation Vol. 49, Issue 9, Pages: 39-45(2020)
- 作者机构：
  
  1. 浙能绍兴滨海热电有限责任公司
  2. 国网浙江省电力有限公司电力科学研究院
  3. 浙江大学能源清洁利用国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201911275
  CLC： TK16
- Published Online：15 August 2020，
  
  Published：2020
- 稿件说明：
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JIN Kanghua, ZHANG Kang, JI Yinfei, et al. Co-pyrolysis characteristics of coal and biomass at medium-high temperatures[J]. Thermal power generation, 2020, 49(9): 39-45.
DOI：

JIN Kanghua, ZHANG Kang, JI Yinfei, et al. Co-pyrolysis characteristics of coal and biomass at medium-high temperatures[J]. Thermal power generation, 2020, 49(9): 39-45. DOI： 10.19666/j.rlfd.201911275.

摘要

为了探究煤与生物质在中高温度条件下共热解过程中热解气的释放特性及元素析出规律

本文采用固定床反应器对松木和兖州煤在800～1 200℃温度下进行中高温热解实验

借助傅立叶红外气体分析仪和氢气分析仪对热解气的组分进行在线测量

并探索其动力学释放特性。结果表明:各热解气中可燃气体主要为H2、CO和CH4;热解温度升高

共热解气中的H2产量会大幅增加

高达75.4 mg/g反应物

CO产量缓慢增加至184.3 mg/g反应物

CH4产量下降;共热解过程中

H2析出最晚且过程在30～200 s

CO的释放过程比CH4快

且释放体积分数峰值更高

可达61.1μL/L;生物质的氮结构存在形式主要为更不稳定的氨基酸和蛋白质

热解时NH3和HCN析出更快但释放峰值更低;此外

煤和生物质共热解时的协同作用不影响CO和CH4的释放。本研究可为未来煤与生物质中高温闪速共热解制气以及低碳清洁能源的利用提供一定指导。

Abstract

To elucidate the volatile dynamic release characteristics during co-pyrolysis of coal and biomass at high/medium temperatures and reveal the element evolution of pyrolysis gas

this study adopts fix-bed reactor to conduct pyrolysis of pine and Yanzhou coal at 800～1 200 ℃. Fourier infrared gas analyzer and hydrogen analyzer are used to detect the gas composition online

thus to explore the dynamic release characteristics of the gases. The results show that

the combustible gases in pyrolysis gas are mainly H2

CO and CH4. As the pyrolysis temperature rises

the production of H2 in the co-pyrolysis gas dramatically increases to 75.4 mg/g blend

the CO production slightly increases to 184.3 mg/g blend

while the CH4 production decreases. During the co-pyrolysis process

H2 comes out the latest and its release period is around 30～200 s. CO releases faster than CH4 and its release peak can go up to 61.1 μL/L. The main nitrogen-containing structure in the biomass are more unstable amino acids and proteins. Its gas evolutions of NH3 and HCN is faster but their release peaks are lower. Additionally

the synergistic effect in the co-pyrolysis of coal and biomass does not affect the release of CO and CH4. This study can provide some guidance for the future co-pyrolysis of coal and biomass and the utilization of low-carbon clean energy.

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