Effect of Co on the pre-reduction process of WO3-Co3O4 and carbonization performance of its product
文献类型:期刊论文
作者 | Shang, Huijun2,3; Li, Hengli1,3; Liu, Jiayi3; Pan, Feng3; Du, Zhan3; Sun, Linbing2 |
刊名 | Huagong Xuebao/CIESC Journal
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出版日期 | 2022-12-05 |
卷号 | 73期号:12页码:5592-5604 |
关键词 | Carbon - Carbonization - Chemical reactors - Cobalt - Ethylene - Particle size - Sintering - Tungsten compounds |
ISSN号 | 4381157 |
DOI | 10.11949/0438-1157.20221018 |
英文摘要 | In order to avoid the formation of 畏 phase (Co6W6C or Co3W3C) that adversely affect the sintering process and its products in the preparation process ultra-fine WC-Co powder, we propose a technical route of pre-reduction of WO3-Co3O4 to WO2-Co and then deep reduction carbonization to WC-Co. The influence of Co content and cobalt source particle size on the pre-reduction process of WO3-Co3O4 was investigated at 600 H2-C2H4-Ar atmosphere in a fluidized-bed reactor, and the deep reduction and carbonization properties of the pre-reduced products were tested. The results show that the presence of Co can catalyze the splitting of C2H4to separate H2and C, significantly accelerate the pre-reduction rate of WO3, and the pre-reduction rate increases significantly with the increase of Co content. The carbon evolution rate and carbon evolution amount of ethylene also increase with the increase of Co content. Cobalt source particle size has a significant effect on the pre-reduction rate of WO3 and carbon evolution rate of C2H4. In this experimental system, the carbon evolution rate of C2H4 in nano cobalt source system is about twice that of micron cobalt source system. Meanwhile, WO3 in nano cobalt source system also has faster reduction rate. The pre-reduced product was calcined with methane partial pressure of 1.25% at 950 for 60 min, and fine WC-Co composite powder without 畏 could be obtained. 漏 2022 Chemical Industry Press. All rights reserved. |
学科主题 | Fluidized Beds |
出版者 | Materials China |
源URL | [http://ir.ipe.ac.cn/handle/122111/61216] ![]() |
作者单位 | 1.School of Chemistry and Chemical Engineering, Shihezi University, Xinjiang, Shihezi; 832003, China 2.College of Chemical Engineering, Nanjing Tech University, Jiangsu, Nanjing; 210009, China 3.State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China |
推荐引用方式 GB/T 7714 | Shang, Huijun,Li, Hengli,Liu, Jiayi,et al. Effect of Co on the pre-reduction process of WO3-Co3O4 and carbonization performance of its product[J]. Huagong Xuebao/CIESC Journal,2022,73(12):5592-5604. |
APA | Shang, Huijun,Li, Hengli,Liu, Jiayi,Pan, Feng,Du, Zhan,&Sun, Linbing.(2022).Effect of Co on the pre-reduction process of WO3-Co3O4 and carbonization performance of its product.Huagong Xuebao/CIESC Journal,73(12),5592-5604. |
MLA | Shang, Huijun,et al."Effect of Co on the pre-reduction process of WO3-Co3O4 and carbonization performance of its product".Huagong Xuebao/CIESC Journal 73.12(2022):5592-5604. |
入库方式: OAI收割
来源:过程工程研究所
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