Comparison of steam-gasification characteristics of coal char and petroleum coke char in drop tube furnace

doi:10.1016/j.cjche.2014.11.032

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (7): 1214-1224.DOI: 10.1016/j.cjche.2014.11.032

• 能源、资源与环境技术 • 上一篇下一篇

Comparison of steam-gasification characteristics of coal char and petroleum coke char in drop tube furnace

Lu Ding, Zhijie Zhou, Wei Huo, Guangsuo Yu

Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology (ECUST), Shanghai 200237, China

收稿日期:2014-08-21 修回日期:2014-11-18 出版日期:2015-07-28 发布日期:2015-08-21
通讯作者: Zhijie Zhou, Guangsuo Yu
基金资助:
Supported by the National High Technology Research and Development of China (2012AA053101, 2011AA050106), the National Key State Basic Research Development Program of China (2010CB227004) and the National Natural Science Foundation of China (21376081).

Comparison of steam-gasification characteristics of coal char and petroleum coke char in drop tube furnace

Lu Ding, Zhijie Zhou, Wei Huo, Guangsuo Yu

Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology (ECUST), Shanghai 200237, China

Received:2014-08-21 Revised:2014-11-18 Online:2015-07-28 Published:2015-08-21
Contact: Zhijie Zhou, Guangsuo Yu
Supported by:
Supported by the National High Technology Research and Development of China (2012AA053101, 2011AA050106), the National Key State Basic Research Development Program of China (2010CB227004) and the National Natural Science Foundation of China (21376081).

摘要/Abstract

摘要： The steam-gasification reaction characteristics of coal and petroleumcoke (PC)were studied in the drop tube furnace (DTF). The effects of various factors such as types of carbonaceous material, gasification temperature (1100-1400 ℃) and mass ratio of steam to char (0.4:1, 0.6:1 and 1:1 separately) on gasification gas or solid products were investigated. The results showed that for all carbonaceous materials studied, H₂ content exhibited the largest part of gasification gaseous products and CH₄ had the smallest part. For the two petroleum cokes, CO₂ content was higher than CO, which was similar to Zun-yi char.When the steam/char ratio was constant, the carbon conversion of both Shen-fu and PC chars increased with increasing temperature. When the gasification temperature was constant, the carbon conversions of all char samples increased with increasing steam/char ratio. For all the steam/char ratios, compared to water gas shift reaction, char-H₂O and char-CO₂ reaction were further from the thermodynamic equilibrium due to a much lower char gasification rate than that of water gas shift reaction rate. Therefore, kinetic effects may play a more important role in a char gasification step than thermodynamic effects when the gasification reaction of char was held in DTF. The calculating method for the equilibrium shift in this studywill be aworth reference for analysis of the gaseous components in industrial gasifier. The reactivity of residual cokes decreased and the crystal layer (L₀₀₂/d₀₀₂) numbers of residual cokes increased with increasing gasification temperature. Therefore, L₀₀₂/d₀₀₂, the carbon crystallite structure parameter, can be used to evaluate the reactivity of residual cokes.

关键词: Drop tube furnace, Steam/char ratio, Thermodynamic equilibrium, Reactivity

Abstract: The steam-gasification reaction characteristics of coal and petroleumcoke (PC)were studied in the drop tube furnace (DTF). The effects of various factors such as types of carbonaceous material, gasification temperature (1100-1400 ℃) and mass ratio of steam to char (0.4:1, 0.6:1 and 1:1 separately) on gasification gas or solid products were investigated. The results showed that for all carbonaceous materials studied, H₂ content exhibited the largest part of gasification gaseous products and CH₄ had the smallest part. For the two petroleum cokes, CO₂ content was higher than CO, which was similar to Zun-yi char.When the steam/char ratio was constant, the carbon conversion of both Shen-fu and PC chars increased with increasing temperature. When the gasification temperature was constant, the carbon conversions of all char samples increased with increasing steam/char ratio. For all the steam/char ratios, compared to water gas shift reaction, char-H₂O and char-CO₂ reaction were further from the thermodynamic equilibrium due to a much lower char gasification rate than that of water gas shift reaction rate. Therefore, kinetic effects may play a more important role in a char gasification step than thermodynamic effects when the gasification reaction of char was held in DTF. The calculating method for the equilibrium shift in this studywill be aworth reference for analysis of the gaseous components in industrial gasifier. The reactivity of residual cokes decreased and the crystal layer (L₀₀₂/d₀₀₂) numbers of residual cokes increased with increasing gasification temperature. Therefore, L₀₀₂/d₀₀₂, the carbon crystallite structure parameter, can be used to evaluate the reactivity of residual cokes.

Key words: Drop tube furnace, Steam/char ratio, Thermodynamic equilibrium, Reactivity

Lu Ding, Zhijie Zhou, Wei Huo, Guangsuo Yu. Comparison of steam-gasification characteristics of coal char and petroleum coke char in drop tube furnace[J]. Chinese Journal of Chemical Engineering, 2015, 23(7): 1214-1224.

Lu Ding, Zhijie Zhou, Wei Huo, Guangsuo Yu. Comparison of steam-gasification characteristics of coal char and petroleum coke char in drop tube furnace[J]. Chin.J.Chem.Eng., 2015, 23(7): 1214-1224.

参考文献

[1] X. Liu, Z.J. Zhou, Q.J. Hu, Z.H. Dai, F.C.Wang, Experimental study on co-gasification of coal liquefaction residue and petroleumcoke, Energy Fuel 25 (8) (2011) 3377-3381.

[2] X.L. Zhan, J. Jia, Z.J. Zhou, F.C. Wang, Influence of blending methods on the cogasification reactivity of petroleum coke and lignite, Energy Convers. Manag. 52 (4) (2011) 1810-1814.

[3] S.S. Vincent, N. Mahinpey, A. Aqsha, Mass transfer studies during CO₂ gasification of torrefied and pyrolyzed chars, Energy 67 (2014) 319-327.

[4] Y.T. Kim, D.K. Seo, J. Hwang, Study of the effect of coal type and particle size on char-CO₂ gasification via gas analysis, Energy Fuel 25 (11) (2011) 5044-5054.

[5] H.L. Tay, C.Z. Li, Changes in char reactivity and structure during the gasification of a Victorian brown coal: Comparison between gasification in O2 and CO₂, Fuel Process. Technol. 91 (8) (2010) 800-804.

[6] W.H. Chen, S.W. Du, T.H. Yang, Volatile release and particle formation characteristics of injected pulverized coal in blast furnaces, Energy Convers. Manag. 48 (7) (2007) 2025-2033.

[7] D.H. Ahn, B.M. Gibbs, K.H. Ko, J.J. Kim, Gasification kinetics of an Indonesian subbituminous coal-char with CO₂ at elevated pressure, Fuel 80 (11) (2001) 1651-1658.

[8] S. Kajitani, N. Suzuki,M. Ashizawa, S. Hara, CO₂ gasification rate analysis of coal char in entrained flow coal gasifier, Fuel 85 (2) (2006) 163-169.

[9] K.S.Milenkova, A.G. Borrego, D. Alvarez, R.Menéndez, Coal blending with petroleum coke in a pulverized-fuel plant, Energy Fuel 19 (2) (2004) 453-458.

[10] Y.C. Zhang, J. Zhang, C.d. Sheng, L. Zhao, F. Xie, J. Chen, Y.X. Liu, NOx emission characteristics of pulverized coal combustion in O₂/N₂, O₂/CO₂ and O₂/CO₂/NO atmospheres, CIESC J. 61 (1) (2010) 159-165.

[11] L.X. Zhang, S. Kudo, N. Tsubouchi, J.I. Hayashi, Y. Ohtsuka, K. Norinaga, Catalytic effects of Na and Ca from inexpensive materials on in-situ steam gasification of char from rapid pyrolysis of low rank coal in a drop-tube reactor, Fuel Process. Technol. 113 (0) (2013) 1-7.

[12] T. Takarada, Y. Tamai, A. Tomita, Reactivities of 34 coals under steam gasification, Fuel 64 (10) (1985) 1438-1442.

[13] L. Ding, Z.J. Zhou, B. Zhao,W. Huo, G.S. Yu, Characteristics of steam-gasification reaction of char with different coal rank in drop tube furnace, CIESC J. 65 (3) (2014) 993-1002.

[14] L. Lu, V. Sahajwalla, D. Harris, Characteristics of chars prepared from various pulverized coals at different temperatures using drop-tube furnace, Energy Fuel 14 (4) (2000) 869-876.

[15] Y. Shin, S. Choi, D.H. Ahn, Pressurized drop tube furnace tests of global coal gasification characteristics, Int. J. Energy Res. 24 (9) (2000) 749-758.

[16] S. Dutta, C.Y. Wen, R.J. Belt, Reactivity of coal and char. 1. In carbon dioxide atmosphere, Ind. Eng. Chem. Process. Des. Dev. 16 (1) (1977) 20-30.

[17] K. Koba, S. Ida, Gasification reactivities of metallurgical cokes with carbon dioxide, steam and their mixtures, Fuel 59 (1) (1980) 59-63.

[18] S.Q. Xu, Z.J. Zhou, X. Gao, G.S. Yu, X. Gong, The gasification reactivity of unburned carbon present in gasification slag from entrained-flow gasifier, Fuel Process. Technol. 90 (9) (2009) 1062-1070.

[19] J.G. Lee, J.H. Kim, H.J. Lee, T.J. Park, S.D. Kim, Characteristics of entrained flow coal gasification in a drop tube reactor, Fuel 75 (9) (1996) 1035-1042.

[20] I. Barin, G. Platzki, Thermochemical Data of Pure Substances, VCH,Weinheim, Federal Republic of Germany and New York, 1993. 10-100.

Comparison of steam-gasification characteristics of coal char and petroleum coke char in drop tube furnace

Comparison of steam-gasification characteristics of coal char and petroleum coke char in drop tube furnace

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 11

编辑推荐

Metrics

本文评价

[1]	Jingyong Liu, Chao Liu, Guang Sun, Wuming Xie, Xiao'e Dang, Jiahong Kuo, Kenlin Chang, Jian Sun, Shuiyu Sun, Musa Buyukada, Fatih Evrendilek. Thermodynamic behaviors of Cu in interaction with chlorine, sulfur, phosphorus and minerals during sewage sludge co-incineration[J]. Chinese Journal of Chemical Engineering, 2018, 26(5): 1160-1170.
[2]	Guozhang Chang, Ximin Yan, Pengyu Qi, Mei An, Xiude Hu, Qingjie Guo. Characteristics of reactivity and structures of palm kernel shell (PKS) biochar during CO₂/H₂O mixture gasification[J]. Chinese Journal of Chemical Engineering, 2018, 26(10): 2153-2161.
[3]	Lin Yang, Jianxin Cao, Caiyu Li. Enhancing the hydration reactivity of hemi-hydrate phosphogypsum through a morphology-controlled preparation technology[J]. , 2016, 24(9): 1298-1305.
[4]	Zhixi Gan, Zheng Cui, Hairong Yue, Siyang Tang, Changjun Liu, Chun Li, Bin Liang, Heping Xie. An efficient methodology for utilization of K-feldspar and phosphogypsum with reduced energy consumption and CO₂ emissions[J]. Chinese Journal of Chemical Engineering, 2016, 24(11): 1541-1551.
[5]	Shu Zhang, Yonggang Luo, Chunzhu Li, Yonggang Wang . Changes in char reactivity due to char-oxygen and char-steam reactions using Victorian brown coal in a fixed-bed reactor[J]. Chinese Journal of Chemical Engineering, 2015, 23(1): 321-325.
[6]	Yingxia Li, Can Luo, Xuan Wang, Chongpin Huang, Biaohua Chen. Transalkylation of Multi-secbutylbenzenes with Benzene over Hierarchical Beta Zeolite[J]. Chinese Journal of Chemical Engineering, 2014, 22(8): 898-902.
[7]	卢振西, 张伟刚. Hydrogenation of Silicon Tetrachloride in Microwave Plasma[J]. Chinese Journal of Chemical Engineering, 2014, 22(2): 227-233.
[8]	Hui Zhou, Jin Sun, Aihong Meng, Qinghai Li, Yanguo Zhang . Effects of Sorbents on the Partitioning and Speciation of Cu During Municipal Solid Waste Incineration[J]. , 2014, 22(11/12): 1347-1351.
[9]	杨运泉, 罗和安, 童刚生, Kevin J.Smith, TYE Ching Thian. Hydrodeoxygenation of Phenolic Model Compounds over MoS₂ Catalysts with Different Structures[J]. , 2008, 16(5): 733-739.
[10]	谭中欣, 李海滨, 王小亮, 蒋旭光, 严建华. 染料残渣焚烧过程中微量元素的形态转化及其迁移分配的预测[J]. , 2007, 15(2): 268-275.
[11]	陈宏刚, 谢克昌. 中国煤的燃烧和NOx排放特性研究[J]. , 2002, 10(3): 333-338.