Improving tar yield and quality by enhancing heat transfer and regulating gas flow in fixed bed coal pyrolysis
文献类型：会议论文
| 作者 | Wu, Rongcheng1; Zhang, Chun1,2; Xu, Guangwen1 |
| 出版日期 | 1905-07-05 |
| 会议日期 | September 15, 2013 - September 18, 2013 |
| 会议地点 | Beijing, China |
| 关键词 | Tar - Coal deposits - Quality control - Bituminous coal - Mass transfer - Particle size - Boiling point - Heat transfer - Pyrolysis |
| 卷号 | 2 |
| 页码 | 930-959 |
| 英文摘要 | Coal pyrolysis is considered to be the most effective way to use coal volatiles by its efficient production of tar and pyrolysis gas, but it represents a complicated physiochemical process so that the tar production from coal via pyrolysissuffers still many challenges after 100-year technical studies, such as having high content of heavy components and low yield of light tar. By noting that the heat and mass transfer in the pyrolysis reactor and the extraction method of gaseous pyrolysis product from the reactor can all significantly affect the final yield and quality of the generated tar, this study investigated the tar production characteristics of coal pyrolyis in an indirectly heated fixed bed pyrolyzer that treats 100 kg coal in each test and uses internals immersed in the coal bed to enhance the heat transfer from the reactor wall to the interior of the bed and to regulate the generated gaseous pyrolysis product to flow from high temperature zone to low-temperature zone. Yilan sub-bituminous coal was tested, and the produced tar was evaluated in terms of both yield and quality shown mainly by the content of heavy components that have boiling points above 360 掳C.The results demonstrated that the use of such particularly-designed internals increased the heating rate for the coal bed by more than 1.5 times. Comparing the reactors with and without the internals, the realized tar yields were 7.34 wt.% and 3.85 wt.% and their contents of light tar (boiling point below 360 掳C) were 70.6% and 64.8 %, respectively. The main components of the tar were found to bed phenols and BTX. Parametric investigation clarified that varying the coal moisture content in 5.1 wt.% and 9.5 wt.% only slightly influenced the tar yield, while changing the coal particle size resulted in notable effect on the distribution of pyrolysis product. The larger the particles size, the lower the tar yield. As a consequence, the tar yield and quality of coal pyrolsis are subject not only to the properties of coal and the conditions of reaction such as temperature but are also adjustable by controlling the flow and transfer conditions inside the reactor. |
| 资助机构 | International Pittsburgh Coal Conference |
| 会议录 | 30th Annual International Pittsburgh Coal Conference 2013, PCC 2013
 |
| 学科主题 | Flow Of Gases |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/59396]  |
| 作者单位 | 1.State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 2.University of Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Wu, Rongcheng,Zhang, Chun,Xu, Guangwen. Improving tar yield and quality by enhancing heat transfer and regulating gas flow in fixed bed coal pyrolysis[C]. 见:. Beijing, China. September 15, 2013 - September 18, 2013. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。