Characteristics of gas evolution profiles during coal pyrolysis and its relation with the variation of functional groups
Lu Zhang
Shichao Qi
Norihiro Takeda
Shinji Kudo
Junichiro Hayashi
Koyo Norinaga
摘要：Strict relation between the substituents or functional groups attached to the coal macromolecules and the generation of the volatile products,e.g.,CH4,H2O,CO,CO2,etc.,during the coal pyrolysis is an important but confusing subject.In this paper,quadrupole mass spectrometry,gas chromatography,and 13C nuclear magnetic resonance are applied to real-time monitoring the formations of volatile products,off-line quantitative determination of the total products from the pyrolysis of a sub-bituminous coal (SC),and the changes of diverse substitents in the SC along with coke foamation,respectively.These measurements are also performed for the pyrolysis of a caking coal to contrast SC.The qualitative and quantitative data reveal that,during coal pyrolysis,the functional groups related with the formation of CO,i.e.,ether,carbonyl,and anhydride,can directly generate CO via bond breaking,or take a detour of the formation of other intermediates via condensation and recombination firstly.Moreover,the formations of CO2 and CH4 are related to the direct removal of-COO-and-CH3,respectively.
机标关键词：
资助基金：The authors are also grateful to the China Scholarship Council (Grant Numbers 201406420035 and 201406420041)
论文发表日期：2018-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：12( 452-463 )
英文信息