胜利褐煤在合成气/复合溶剂体系下液化性能研究

李强林; 陈卓; 周群; 戴力; 李良; 吴诗勇

胜利褐煤在合成气/复合溶剂体系下液化性能研究

李强林¹,
陈卓¹,
周群¹,
戴力¹,
李良¹,
吴诗勇^{1, 2, ,}

1.
华东理工大学资源与环境工程学院, 上海 200237
2.
煤气化及能源化工教育部重点实验室, 上海 200237

基金项目:

国家自然科学基金 21476079

国家自然科学基金 21476080

中央高校基本科研业务费专项 WB1414014

详细信息

通讯作者:
吴诗勇, Tel: +86-21-64252037; E-mail: wsy@ecust.edu.cn

中图分类号: TQ536
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- 被引次数: 0
出版历程
- 收稿日期: 2015-07-08
- 修回日期: 2015-12-21
- 网络出版日期: 2021-01-23
- 刊出日期: 2016-03-30

Shengli lignite liquefaction under syngas and complex solvent

LI Qiang-lin¹,
CHEN Zhuo¹,
ZHOU Qun¹,
DAI Li¹,
LI Liang¹,
WU Shi-yong^{1, 2
, ,}

1.
College of Resource & Environmental Engineering, Shanghai 200237, China
2.
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

Funds:

National Natural Science Foundation of China 21476079

National Natural Science Foundation of China 21476080

and the Fundamental Research Funds for the Central Universities WB1414014

摘要

摘要: 在合成气(H₂+CO)/复合溶剂(THN+H₂O) 体系和氢气/四氢萘(H₂/THN) 体系下考察了胜利褐煤液化性能, 并对液化产物沥青烯和前沥青烯进行了红外光谱分析.结果表明, 合成气/复合溶剂体系下胜利褐煤液化转化率和油产率显著高于H₂/THN体系, 当反应条件为H₂:CO=1:1(体积比)、THN:H₂O=1:1(体积比)、反应温度400℃、初压4MPa、时间30min、催化剂添加量3%(Fe的质量计) 和硫铁原子比1.2时, 胜利褐煤液化转化率和油产率分别为88.79%和55.47%, 比H₂/THN体系分别高出8.00%和7.54%.据此表明, 在合成气/复合溶剂体系下, 水煤气变换反应产生的氢活性更高, 对煤和液化产物前沥青烯具有更好的加氢效果, 同时四氢萘的存在稳定了煤热解自由基和溶解分散液化重质产物沥青烯和前沥青烯, 这些因素的协同作用提高了煤液化转化率和油产率.实验表明, 合成气/复合溶剂体系是一种新的褐煤直接液化技术.
- 合成气 /
- 复合溶剂 /
- 胜利褐煤 /
- 直接液化
Abstract: The liquefaction of Shengli lignite (SL) were studied in the system of syngas (H₂+CO) and complex solvent (H₂O+THN) and the system of hydrogen (H₂) and tetralin (THN). Asphaltene (AS) and preasphaltene (PA) from the two systems were characterized by FT-IR. The results show that both conversion and oil yield of Shengli lignite liquefaction in the (H₂+CO)/(H₂O+THN) system are significantly higher than those in the H₂/THN system. The conversion and oil yield under syngas (H₂:CO=1:1) and complex solvent (THN:H₂O=1:1) reach respectively 88.79% and 55.47% at 400℃, 4MPa and 30min. The differences in the conversion and oil yield between the (H₂+CO)/(H₂O+THN) and H₂/THN systems are 8.00% and 7.54%, respectively. This suggests that the water-gas shift reaction can produce active hydrogen in the (H₂+CO)/(H₂O+THN) system, which benefits the hydrogenation of SL and PA. Meanwhile, THN can stabilize the free radicals from SL pyrolysis and dissolve the products (AS and PA) from SL liquefaction. The synergistic effect of two factors results in the improvement of conversion and oil yield. This study shows that it is a new lignite liquefaction technology using the (H₂+CO)/(H₂O+THN) system.
- syngas /
- complex solvent /
- Shengli lignite /
- direct liquefaction

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图 1 液化产物分离流程示意图

Figure 1 Schematic diagram of product separation

下载: 全尺寸图片幻灯片

图 2 H₂/THN和合成气/复合溶剂体系下胜利褐煤液化性能

Figure 2 Comparison in SL liquefaction between H₂/THN and (H₂+CO)/(THN+H₂O) systems

下载: 全尺寸图片幻灯片

图 3 初始气氛中CO浓度对胜利褐煤液化性能的影响

Figure 3 Effect of CO contents on SL liquefaction in (H₂+CO)/(THN+H₂O) system

下载: 全尺寸图片幻灯片

图 4 溶剂中水含量对胜利褐煤液化性能的影响

Figure 4 Effect of H₂O contents on SL liquefaction in the (H₂+CO)/(THN+H₂O) system

下载: 全尺寸图片幻灯片

图 5 H₂/THN和合成气/复合溶剂体系下液化产物AS和PA的红外光谱谱图

Figure 5 FT-IR spectra of AS and PA from SL liquefaction in H₂/THN and (H₂+CO)/(THN+H₂O) systems

(a): AS; (b): PA

下载: 全尺寸图片幻灯片

表 1 胜利褐煤的工业分析和元素分析

Table 1 Proximate and ultimate analyses of SL

Sample	Proximate analysis w/%				Ultimate analysis w/%				H/C (atomic ratio)
Sample	M_ad	A_d	V_daf	FC_daf	C_daf	H_daf	N_daf	S_{t, d}	H/C (atomic ratio)
SL	20.77	17.14	46.96	53.04	70.18	5.31	1.09	1.82	0.91
S_{t, d}: total sulfur on dry basis

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表 2 H₂/THN和合成气/复合溶剂体系下各产物产率

Table 2 Yields of various products from SL liquefaction in H₂/THN and (H₂+CO)/(THN+H₂O) systems

System	Yield w/%				Conversion x/%
System	gas	oil	AS	PA	Conversion x/%
H₂/THN	5.73	47.93	6.52	20.60	80.78
Syngas/complex solvent	15.61	55.47	13.02	4.68	88.78
Δ^*	9.88	7.54	6.50	-15.92	8.00
^*: the difference between syngas/complex solvent system and H₂/THN system

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表 3 H₂/THN和合成气/复合溶剂体系下褐煤液化气体组分

Table 3 Gas compositions from SL liquefaction with the H₂/THN and (H₂+CO)/(THN+H₂O) systems

System	Before liquefaction φ /%		After liquefaction φ /%
System	H₂	CO	H₂	CO	CO₂	C_1-4
H₂/THN	100	-	97.38	0.76	1.26	0.60
Syngas/complex solvent	50	50	50.39	23.13	25.77	0.71

下载: 导出CSV

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