摘要
采用体积法研究了甲苯、四氢萘、甲醇、二甲亚砜、N,N-二甲基甲酰胺(DMF)和乙醇胺(MEA)5种纯溶剂及1∶1的MEA-DMF混合溶剂对神华烟煤的溶胀行为,考察了Fe(NO3)3、Fe2(SO4)3和FeSO4添加量为0.5%(以铁占煤质量计)作为溶胀促进剂的性能。结果表明:MEA-DMF混合溶剂的溶胀效果优于5种单一溶剂。铁盐Fe(NO3)3明显促进煤溶胀,在80℃,24h和剂煤比5∶1条件下MEA-DMF混合溶剂与Fe(NO3)3协同可使溶胀率超过3.0。对溶胀处理后的神华煤FT-IR表明DMF、DMF-MEA溶胀处理以及与Fe(NO3)3协同溶胀处理后明显削弱了煤羟基氢键间的缔合作用,其中,经DMF-MEA与Fe(NO3)3协同溶胀处理的这一变化最为明显。
Swelling of Shenhua coal in toluene,tetralin,methanol,dimethyl sulfoxide,N,N-dimethylformamide（DMF）and monoethanolamine（MEA）,as well as in a mixed solvent of DMF-MEA（1∶1）was investigated via the swelling volume method. Coal swelling improvement with 0.5% of Fe（NO3）3,Fe2（SO4）3 and FeSO4（based on Fe to coal）as swelling promoters were studied. Results showed that the coal swelling in the DMF-MEA mixed solvent was markedly better than any of the pure solvents. The swelling was clearly improved with Fe（NO3）3. The coal swelling ratio reached to over 3.0 with MEA-DMF and Fe（NO3）3 at 80 ℃ for 24 h and solvent to coal ratio of 5∶1. FT-IR of the swelled coal showed an improved coal hydrogen bonding dissociation. The coal hydrogen bonding dissociation was the most obvious in the swelling system of DMF-MEA and Fe（NO3）3.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2010年第10期1885-1889,共5页
Chemical Industry and Engineering Progress
基金
中石油中青年创新基金(04E7039)
重质油国家重点实验室专项(E080420B-10)资助项目
关键词
烟煤
溶胀
溶胀促进剂
混合溶剂
铁盐
红外光谱
bituminous coal
swelling
swelling promoters
mixed solvents
ironic salts
FT-IR
