燃烧与催化气化灰中铝溶出行为的研究

梅艳钢; 王志青; 方惠斌; 冯荣涛; 房倚天

燃烧与催化气化灰中铝溶出行为的研究

梅艳钢^{1, 2},
王志青^1, ,,
方惠斌¹,
冯荣涛^{1, 2},
房倚天¹

1.
中国科学院山西煤炭化学研究所煤转化国家重点实验室, 山西太原 030001
2.
中国科学院大学, 北京 100049

基金项目:

国家自然科学基金 21676289

中国科学院国家外国专家局创新团队国际合作伙伴计划和中国科学院青年创新促进会 2014156

详细信息

通讯作者:
王志青, Tel:+86 351 2021137-801, Fax:+86 351 2021137-802, E-mail:qcumt@sxicc.ac.cn

中图分类号: TQ522.1
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出版历程
- 收稿日期: 2016-11-10
- 修回日期: 2017-01-11
- 网络出版日期: 2021-01-23
- 刊出日期: 2017-04-10

Comparison of leaching behaviors of aluminum in ash from combustion and catalytic gasification

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

the National Natural Science Foundation of China 21676289

the Research Supported by the CAS/SAFEA International Partnership Program for Creative Research Teams and Youth Innovation Promotion Association 2014156

摘要

摘要: 实验对比了燃烧灰与负载Na₂CO₃催化气化灰中Al的溶出行为，考察了Na₂CO₃负载量（0-15%，质量分数）和温度（600-1 000℃）对催化气化灰中主要矿物组成与Al溶出行为的影响。同时，采用XRD分析了燃烧灰、催化气化灰以及酸浸残渣的主要组成。结果表明，燃烧灰的主要组成为莫来石，而催化气化灰的主要组成为硅铝酸钠（（Na₂O）_0.33NaAlSiO₄）。6 mol/L硫酸、60℃和30 min浸取条件下，燃烧灰的浸出率只有40%，而Na₂CO₃负载量为10%的催化气化灰的浸出率达到88%。催化气化灰更易于回收灰中的Al。
- 催化气化 /
- 煤灰 /
- 氧化铝提取
Abstract: The leaching behaviors of aluminum in ash from combustion and catalytic gasification, and effects of Na₂CO₃ addition (0-15%), temperature (600-1 000℃) on Al leaching behaviors and mineral composition were investigated. The compositions of ash from combustion and gasification, and acid leaching residue were investigated by XRD. The results shows that the combustion ash is predominantly composed of mullite, while that from catalytic gasification is sodium aluminum silicate ((Na₂O)_0.33NaAlSiO₄). The Al extraction yield of combustion ash only reaches 40% at leaching conditions of 6 mol/L H₂SO₄, 60℃ and 30 min, while that of catalytic gasification ash with 10% Na₂CO₃ addition can reach 88%. The catalytic gasification with Na₂CO₃ addition can achieve higher Al extraction yield.
- catalytic gasification /
- coal ash /
- alumina extraction

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图 1 孙家豪煤的XRD谱图

Figure 1 XRD patterns of SJH coal

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图 2 燃烧灰与催化气化灰Al浸出率随H₂SO₄浓度变化

Figure 2 Al extraction of the burnt ash and catalytic gasification ash with different concentration of H₂SO₄

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图 3 燃烧灰与催化气化灰中Al浸出率随NaOH浓度变化

Figure 3 Al extraction of burnt ash and catalytic gasification ash with different concentration of NaOH

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图 4 燃烧灰与催化气化灰的XRD谱图

Figure 4 XRD patterns of burnt and catalytic gasification ash

1: mullite (3Al₂O₃·2SiO₂); 2: cristobalite; 3: sodium aluminum silicate ((Na₂O)_0.33NaAlSiO₄)

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图 5 催化气化灰与燃烧灰的酸浸残渣

Figure 5 Residue of burnt and catalytic gasification ash by acid leaching

1: quarzt (monoclinic); 2: mullite; 3: cristobalite

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图 6 Al浸出率随气化温度的变化

Figure 6 Al extraction changes with different gasification temperature

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图 7 Al浸出率随Na₂CO₃负载量的变化

Figure 7 Al extraction changes with different Na₂CO₃ loading

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图 8 不同温度下催化气化灰的XRD谱图

Figure 8 XRD patterns of catalytic gasification ash at different temperatures

1: trikalsilite; 2: Na₂CO₃; 3: sodium aluminum silicate (Na_1.55Al_1.55Si_0.45O₄); 4: nepheline (NaAlSiO₄); 5: sodium aluminum silicate ((Na₂O)_0.33NaAlSiO₄)

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图 9 不同Na₂CO₃负载量催化气化灰的XRD谱图

Figure 9 XRD patterns of catalytic gasification ash with various Na₂CO₃ addition

1: mullite; 2: nepheline (Na_6.65Al_6.24Si_9.76O₃₂); 3: sodium aluminum silicate (NaAlSiO₄); 4: sodium aluminum silicate ((Na₂O)_0.33NaAlSiO₄)

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表 1 孙家豪煤的工业分析和元素分析

Table 1 Proximate and ultimate analyses of SJH coal

Sample	Proximate analysis w_ad/%				Ultimate analysis w_daf/%
Sample	V	FC	A	M	C	H	N	S	O^*
SJH coal	29.6	51.2	16.9	2.3	78.8	4.9	1.5	0.8	14
^*: by difference

下载: 导出CSV

表 2 孙家豪煤灰的矿物质组成

Table 2 Ash compositions of SJH coal

Composition w/%
Al₂O₃	SiO₂	Fe₂O₃	TiO₂	CaO	MgO	Na₂O	SO₃	K₂O	P₂O₅
46.34	36.29	6.38	3.57	2.61	2.18	0.76	0.45	0.42	0.03

下载: 导出CSV

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燃烧与催化气化灰中铝溶出行为的研究

通讯作者:
王志青, Tel:+86 351 2021137-801, Fax:+86 351 2021137-802, E-mail:qcumt@sxicc.ac.cn

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Comparison of leaching behaviors of aluminum in ash from combustion and catalytic gasification

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燃烧与催化气化灰中铝溶出行为的研究

通讯作者: 王志青, Tel:+86 351 2021137-801, Fax:+86 351 2021137-802, E-mail:qcumt@sxicc.ac.cn

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出版历程

Comparison of leaching behaviors of aluminum in ash from combustion and catalytic gasification

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出版历程

目录

2023年《燃料化学学报（中英文）》评优结果公布！

通讯作者:
王志青, Tel:+86 351 2021137-801, Fax:+86 351 2021137-802, E-mail:qcumt@sxicc.ac.cn