高温抗烧结吸附剂对SeO2捕集性能

doi:10.16085/j.issn.1000-6613.2022-0234

化工进展 ›› 2022, Vol. 41 ›› Issue (12): 6711-6722.DOI: 10.16085/j.issn.1000-6613.2022-0234

高温抗烧结吸附剂对SeO₂捕集性能

杨晓域¹(), 于梦竹¹(), 黄亚继¹(), 李金壘¹, 朱志成¹, 李志远¹, 王圣², 李秋白²

^1.东南大学能源热转换及其过程测控教育部重点实验室，江苏南京 210096
^2.国家能源集团科学技术研究院有限公司，江苏南京 210000

收稿日期:2022-02-15 修回日期:2022-04-03 出版日期:2022-12-20 发布日期:2022-12-29
通讯作者: 黄亚继
作者简介:杨晓域（1995—），男，硕士研究生，研究方向为气态污染物控制。E-mail：220194297@seu.edu.cn
于梦竹（1993—），女，博士研究生，研究方向为气态污染物控制。E-mail：yumz@seu.edu.cn。
基金资助:
国家自然科学基金(51976036);国家重点研发计划(2018YFB0605102)

Improved capture capacity of SeO₂ by sorbents with anti-sintering at high temperature

YANG Xiaoyu¹(), YU Mengzhu¹(), HUANG Yaji¹(), LI Jinlei¹, ZHU Zhicheng¹, LI Zhiyuan¹, WANG Sheng², LI Qiubai²

^1.Key Laboratory of Energy Thermal Conversion and Control of the Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China
^2.China Energy Corporation Science and Technology Research Institute Co. , Ltd. , Nanjing 210000, Jiangsu, China

Received:2022-02-15 Revised:2022-04-03 Online:2022-12-20 Published:2022-12-29
Contact: HUANG Yaji

摘要/Abstract

摘要：

使用气固瞬时反应装置在700~1100℃下对不同氧化物（氧化镁、氧化铁、氧化铝、氧化钙）的硒捕集性能进行研究，确定吸附产物性质。基于此选取相应的典型矿物及双组分抗烧结吸附剂改善硒高温吸附能力。结果表明：900℃前氧化钙捕集效果最好，但1100℃时其吸附量迅速降低到167.59μg/g；γ-氧化铝在高温下捕集效果较好，1100℃时吸附量可达415.04μg/g，这与其优异的孔隙结构有关。钙基矿物方解石因其具有一定的抗烧结能力和发达的孔隙结构，表现出更好的高温捕集能力，1100℃时吸附量可提高到1064.97μg/g。双组分吸附剂高温捕集能力展现出不同程度的提高。钙-铝基吸附剂高温捕集性能提高相对较小；而钙-硅基吸附剂在高温下效果远高于单组分吸附剂，与氧化钙相比，1100℃时可提高1787.21μg/g。

关键词: 硒, 矿物, 双组分吸附剂, 高温捕集, 抗烧结性

Abstract:

Selenium (Se) capture capacity by different oxides (MgO, Fe₂O₃, Al₂O₃ and CaO) at 700—1100℃ were performed by a gas-solid instant reaction system to determine characteristics of adsorption products. Then, corresponding typical minerals and bicomponent composite sorbents with anti-sintering were chosen to improve Se capture capacity at high temperature. Results showed that the capacity of CaO was highest before 900℃, but noticeably decreased to 167.59μg/g as temperature rose to 1100℃. Capture capacity of γ-Al₂O₃ was greater at high temperature, which could reach 415.04μg/g at 1100℃ likely due to its great pore structure. Calcite, one of typical Ca-based minerals, indicated great high-temperature capture capacity because of its great anti-sintering and pore structure, and the capacity could be improved to 1064.97μg/g at 1100℃. Capture capacity of bicomponent composite sorbents at high temperature presented some improvement. Capacity of Ca-Al based sorbent increased slightly, while that of Ca-Si based sorbent was much higher than that of monocomponent based sorbents, which increased by 1787.21μg/g than that of CaO.

Key words: selenium, minerals, bicomponent sorbents, high-temperature capture, anti-sintering

中图分类号:

X511

杨晓域, 于梦竹, 黄亚继, 李金壘, 朱志成, 李志远, 王圣, 李秋白. 高温抗烧结吸附剂对SeO₂捕集性能[J]. 化工进展, 2022, 41(12): 6711-6722.

YANG Xiaoyu, YU Mengzhu, HUANG Yaji, LI Jinlei, ZHU Zhicheng, LI Zhiyuan, WANG Sheng, LI Qiubai. Improved capture capacity of SeO₂ by sorbents with anti-sintering at high temperature[J]. Chemical Industry and Engineering Progress, 2022, 41(12): 6711-6722.

图/表 22

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T/°C	ΔH/kcal	ΔS/cal·K^-1	ΔG/kcal	lgK	T/°C	ΔH/kcal	ΔS/cal·K^-1	ΔG/kcal	lgK
500	84.156	108.146	0.543	-0.153	900	94.349	118.762	-44.976	8.379
600	86.677	111.212	-10.428	2.610	1000	96.937	120.878	-56.959	9.779
700	89.218	113.967	-21.689	4.871	1100	99.539	122.846	-69.147	11.006
800	91.776	116.469	-33.213	6.764	1200	102.156	124.686	-81.524	12.096

T/°C	ΔH/kcal	ΔS/cal·K^-1	ΔG/kcal	lgK	T/°C	ΔH/kcal	ΔS/cal·K^-1	ΔG/kcal	lgK
500	84.156	108.146	0.543	-0.153	900	94.349	118.762	-44.976	8.379
600	86.677	111.212	-10.428	2.610	1000	96.937	120.878	-56.959	9.779
700	89.218	113.967	-21.689	4.871	1100	99.539	122.846	-69.147	11.006
800	91.776	116.469	-33.213	6.764	1200	102.156	124.686	-81.524	12.096

T/°C	ΔH/kcal	ΔS/cal·K^-1	ΔG/kcal	lgK
500	166.491	403.340	-145.351	41.090
600	173.289	411.606	-186.105	46.586
700	180.202	419.101	-227.647	51.129
800	187.199	425.945	-269.904	54.971
900	194.266	432.241	-312.817	58.281
1000	201.390	438.069	-356.336	61.174
1100	208.565	443.493	-400.418	63.736

T/°C	ΔH/kcal	ΔS/cal·K^-1	ΔG/kcal	lgK
500	166.491	403.340	-145.351	41.090
600	173.289	411.606	-186.105	46.586
700	180.202	419.101	-227.647	51.129
800	187.199	425.945	-269.904	54.971
900	194.266	432.241	-312.817	58.281
1000	201.390	438.069	-356.336	61.174
1100	208.565	443.493	-400.418	63.736

T/°C	ΔH/kcal	ΔS/cal·K^-1	ΔG/kcal	lgK
600	41.565	39.117	7.409	-1.855
700	40.699	38.179	3.544	-0.796
800	39.717	37.220	-0.226	0.046
900	38.615	36.239	-3.899	0.726
1000	37.389	35.237	-7.473	1.283
1100	36.039	34.217	-10.946	1.742

高温抗烧结吸附剂对SeO₂捕集性能

Improved capture capacity of SeO₂ by sorbents with anti-sintering at high temperature

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参考文献 42

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Metrics

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样品	比表面积/m²·g^-1	孔容/cm³·g^-1	孔径/nm
MgO（700℃）	3.58	0.0096	10.75
Fe₂O₃（700℃）	2.92	0.0074	10.08
高岭土（700℃）	2.61	0.0094	14.45
方解石（900℃）	6.55	0.0203	12.39
CaSiO₃（700℃）	3.44	0.0110	12.81
CaSiO₃（900℃）	3.17	0.0056	7.08

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