Reactive synthesis and assessment of porous Fe-20.5Al-18Cr intermetallic material: A comparative study with porous FeCrAl material produced from prealloyed powders

被引：19
作者：
Zhang, Huibin [1 ,2 ]
Gao, Haiyan [2 ]
Liu, Xinli [2 ,3 ]
Yu, Hang [1 ]
Wang, Longfei [1 ]
Jiang, Yao [2 ]
Gao, Lin [4 ]
Yu, Linping [5 ]
He, Yuehui [2 ]
Chen, Xiaoming [6 ]
Zhang, Lei [6 ]
Zheng, Guoqu [1 ]
机构：
[1] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Zhejiang, Peoples R China
[2] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
[3] Cent S Univ, Coll Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[4] Intermet Technol Chengdu Co LTD, Chengdu 611731, Sichuan, Peoples R China
[5] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China
[6] Key Lab Res Hydraul & Hydropower Equipment Surfac, Hangzhou 310014, Zhejiang, Peoples R China
来源：
SEPARATION AND PURIFICATION TECHNOLOGY | 2019年 / 220卷
基金：
中国国家自然科学基金;
关键词：
FeAl; FeCrAl; Porous material; Intermetallic; Filtration; Coal gas; HOT GAS FILTRATION; TEMPERATURE OXIDATION; FEAL INTERMETALLICS; DEGREES-C; ALLOYS; BEHAVIOR; FILTERS; IRON; METAL; PERMEABILITY;
D O I：
10.1016/j.seppur.2019.03.054
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
B2-structured Fe-20.5Al-18Cr (wt.%) intermetallic filter material developed for high-temperature coal-gas purification was fabricated by reactive synthesis using blended Fe/Al/Cr powders. This method addresses the problems presented in the manufacture of porous Fe-Al-Cr materials with high content of Al, making the production more convenient, flexible and controllable. The exothermic effect, volume swelling, pore formation and diffusion reactions during the reactive synthesis of porous Fe-20.5Al-18Cr were investigated systematically. A comparative study with porous Fe20Cr7Al material produced from prealloyed powders was carried out synchronously. The results show that during sintering the Fe-20.5Al-18Cr compact presents limited exothermic behavior and obvious volume expansion, and that the abundant pores and compositional homogenization can be obtained through the interactions of Fe/Al/Cr powders after final sintering. As compared with sintered Fe20Cr7Al porous material, porous Fe-20.5Al-18Cr possesses bigger permeability constants and lower oxidation and sulfidation rates. Pilot-scale filtration tests reveal that Fe-20.5Al-18Cr filter material can robustly serve in the corrosive H2S-contained and alkali-metals-oxides-loaded high-temperature coal gas during a period of 1000 h.
引用
收藏
页码：152 / 161
页数：10
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