低阶煤温和液化-炭化耦合转化过程及产物性质

庄德旺; 吴诗勇; 尤全; 黄胜; 尚建选; 闵小建; 郑化安; 吴幼青

低阶煤温和液化-炭化耦合转化过程及产物性质

庄德旺¹,
吴诗勇^{1, 2},
尤全¹,
黄胜^{1, 2},
尚建选³,
闵小建³,
郑化安³,
吴幼青^{1, 2, ,}

1.
华东理工大学能源化工系, 上海 200237
2.
华东理工大学煤气化及能源化工教育部重点实验室, 上海 200237
3.
陕西煤业化工技术研究院有限责任公司, 陕西西安 710070

基金项目:

国家自然科学基金 21476079

国家自然科学基金 21476080

中央高校基本业务费 WB1414014

详细信息

通讯作者:
吴幼青, Tel/Fax: 021-64252037, E-mail: wyq@ecust.edu.cn

中图分类号: TQ529
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- 文章访问数: 80
- HTML全文浏览量: 28
- PDF下载量: 11
- 被引次数: 0
出版历程
- 收稿日期: 2015-12-31
- 修回日期: 2016-02-25
- 网络出版日期: 2021-01-23
- 刊出日期: 2016-05-10

Low rank coal mild liquefaction coupled with carbonization and its products

1.
Department of Energy Chemical Engineering, East China University of Science & Technology, Shanghai 200237, China
2.
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science & Technology, Shanghai 200237, China
3.
Shaanxi Coal and Chemical Technology Institute CO., Ltd., Xi'an 710070, China

Funds:

the National Natural Science Foundation of China 21476079

the National Natural Science Foundation of China 21476080

the Fundamental Research Funds for the Central Universities WB1414014

摘要

摘要: 基于低阶煤温和液化-炭化耦合工艺, 主要研究了390-450 ℃液化温度条件下的产物分布特征, 分析了所得液相产物和半焦的性质。结果表明, 有机液相产率达23.44%-33.26%(干燥无灰基煤为基准), 半焦产率达49.56%-68.72%(干燥无灰基煤为基准); 所得液相产物水含量为1.30%-2.49%, 不含固体颗粒, 有机液相产物的正己烷可溶物含量达98.95%以上; 所得半焦碳含量高达87.87%-93.45%(干燥无灰基), 部分半焦产物具有强黏结性的特点, 并且黏结性与其沥青质含量相关。
- 低阶煤 /
- 温和液化-炭化耦合 /
- 液相产物 /
- 半焦 /
- 黏结性
Abstract: The distribution of products was preliminarily studied based on a process of low rank coal mild liquefaction at 390-450 ℃ coupled with carbonization. The characteristics of liquid product and semi-coke were analyzed. The results showed that the organic liquid product yield is 23.44%-33.26% (daf, coal) and the semi-coke yield is 49.56%-68.72% (daf, coal). The water content of liquid product is 1.30%-2.49%. The n-hexane soluble content of organic liquid product is higher than 98.95% with no solid particles in liquid product. The carbon content of semi-coke obtained is 87.87%-93.45% (daf), some semi-cokes have the characteristics of strong caking property. There is a close correlation between caking property and asphaltene content of semi-coke.
- low rank coal /
- mild liquefaction coupled with carbonization /
- liquid product /
- semi-coke /
- caking property

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图 1 炭化实验装置示意图

Figure 1 Schematic diagram for carbonization

1: gas cylinder (N₂); 2: mass flowmeter; 3: spin valve; 4: reactor; 5: salt bath; 6: condensation collector; 7: acetone absorber; 8: ice-water bath

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图 2 液化温度390-450 ℃条件下液化-炭化产物的产率及液化产生气相产物组分

Figure 2 Yield of products (a) and gas composition (b) of liquefaction and carbonization at the liquefaction temperatures of 390-450 ℃

■: semi-cokes; ●: organic liquid products; ▲: gaseous products from liquefaction; ◆: gaseous products from carbonization; ▼: water; ▽: CH₄; □: C_2-4; ○: CO₂; △: CO

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图 3 液化温度390-450 ℃条件下液相产物的水含量和有机液相产物的正己烷可溶物含量

Figure 3 Water content of liquid product and n-hexane soluble content of organic liquid product at the liquefaction temperatures of 390-450 ℃

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图 4 原煤和半焦的TG和DTG曲线

Figure 4 TG and DTG curves of raw coal and semi-cokes

a: 450 ℃; b: 430 ℃; c: 410 ℃; d: 390 ℃; e: raw coal

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图 5 液化温度390-450 ℃条件下所得半焦的黏结指数、挥发分和沥青质含量之间的关系

Figure 5 Relation among caking index, volatile content and asphaltene content of semi-coke obtained at the liquefaction temperatures of 390-450 ℃

○: coking indexes (G); ■: asphaltene content; ▲: V_daf

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表 1 原煤的工业分析和元素分析

Table 1 Proximate and ultimate analysis of raw coal

Proximate analysis w/%			Ultimate analysis w/%					H/C (atomic ratio)
M_ad	A_d	V_daf	C_daf	H_daf	N_daf	S_{t, d}	O^a	H/C (atomic ratio)
1.59	5.63	36.81	84.34	5.17	1.04	0.38	9.07	0.74
^a：by difference

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表 2 液化温度390-450 ℃条件下所得半焦的工业分析与元素分析

Table 2 Proximate and ultimate analysis of semi-cokes obtained at the liquefaction temperatures of 390-450 ℃

Temperature t/℃	Proximate analysis w/%			Ultimate analysis w/%					H/C (atomic ratio)
Temperature t/℃	M_ad	A_d	V_daf	C_daf	H_daf	N_daf	S_{t, d}	O^a	H/C (atomic ratio)
390	0.35	9.39	29.02	87.87	5.16	0.95	0.71	5.31	0.70
410	0.29	10.73	27.71	89.85	5.12	0.91	0.79	3.33	0.68
430	0.27	12.52	25.43	91.81	4.95	0.90	0.88	1.46	0.65
450	0.23	13.42	19.91	93.45	4.04	0.79	0.98	0.74	0.52
^a：by difference

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