Structural characterization of char during co-gasification from torrefied sludge and Yangchangwan bituminous coal
Xinsha Zhang1
Yonghui Bai2
Jie Qin3
Shengli Shi3
Jiazhong Liu3
Shuaibing Wang3
Minhui Zhao3
Guiming Shi3
Changbing Ye3
Guangsuo Yu4
1.Yuxi Normal University,Yuxi,Yunnan 653100,China;State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China2.State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China3.Yuxi Normal University,Yuxi,Yunnan 653100,China4.State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China;Institute of Clean Coal Technology,East China University of Science and Technology,Shanghai 200237,China
摘要：The present study aims to investigate the physico-chemical structural evolution characteristics of char structure of CO2 atmosphere torrefaction pretreated sludge with Yangchangwan bituminous coal(YC)during co-gasification.The co-gas-ification reactivity of torrefied sludge and YC was measured using a thermogravimetric analyzer.The co-gasification reactivity of torrefied sludge with YC was thoroughly explored in depth by in situ heating stage microscope coupled with traditional characterization means of char sample(Scanning electron microscope,nitrogen adsorption analyzer,laser Raman spectroscopy).The results show that the gasification reaction rate of sludge treated under CO2 atmosphere and coal blended char was better than other char samples at 1100-1200 ℃.The torrefied sludge under CO2 atmosphere promoted its thermal decomposition to the maximum extent,so that it eventually was transformed into a large number of small broken particles.The specific surface area and ID1/IG ratio of blended char of torrefied sludge under CO2 atmosphere and YC were 1.70 and 1.07 times higher than that of YC,respectively.The in situ technique revealed that YC char with the addition of torrefied sludge undergo gasification by shrinking core modes and the presence of obvious ash melting flow phenomenon.It was more obvious than that of YC.
机标关键词：frombituminouscharacterco-gasificationcoalduringsludgestructural
论文发表日期：2023-10-28
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：9( 12-20 )
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