Simultaneous SAXS‑WAXS study on coking coal during high temperature carbonization
(주)코리아스칼라
- 최초 등록일
- 2023.05.22
- 최종 저작일
- 2023.03
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon letters / 33권 / 2호
ㆍ저자명 : Yuexiang Wang, Zhihong Li, Jiao Kong, Liping Chang
목차
Abstract
1 Introduction
2 Materials and methods
2.1 Samples
2.2 In-situ SAXS-WAXS characterization
2.3 True density measurement
3 Results and discussion
3.1 Nature of raw coal
3.2 In-situ SAXS and WAXS
3.3 Structure evolution during heating
3.4 Structure evolution during cooling
4 Summary
References
영어 초록
Coking coal is an important raw material for coke production. In this study, in an inert atmosphere, two Chinese coking coal samples were, respectively, heated gradually to 1200 °C to release volatile and form char and coke in succession, then cooled naturally to close room temperature to age the coke. The whole heating and cooling process on carbonization were monitored in situ by simultaneous small and wide-angle X-ray scattering (SAXS-WAXS) technique based on a synchrotron radiation platform. The simultaneous structural changes of pore and skeleton in coal during carbonization are revealed for the first time. The two raw coal samples, with similar carbon content and slightly different coalification degree, undergone a carbonization process similar in whole and different in parts. The carbonization presents approximately three stages during heating process and one stage during cooling process. The coal structure changes wavily during heating and monotonously during cooling. The corresponding structural change mechanism is analyzed.
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