洁净煤技术
潔淨煤技術
길정매기술
CLEAN COAL TECHNOLOGY
2014年
6期
9-12,18
,共5页
周建明%胡秀秀%王奕唯%饶天羲%许德平
週建明%鬍秀秀%王奕唯%饒天羲%許德平
주건명%호수수%왕혁유%요천희%허덕평
褐煤%超临界乙醇%脱氧率%固相产率%酚类%酯类
褐煤%超臨界乙醇%脫氧率%固相產率%酚類%酯類
갈매%초림계을순%탈양솔%고상산솔%분류%지류
lignite%supercritical ethanol%deoxygenation rate%solid product yield%phenols%esters
为有效脱除褐煤中含氧官能团，采用超临界乙醇工艺处理胜利褐煤，研究温度、停留时间和醇煤质量比对胜利褐煤脱氧效果的影响，并利用 FT-IR 和 GC / MS 对固液相产物进行表征。结果表明，胜利褐煤超临界乙醇脱氧的最佳工艺条件为：温度270℃，停留时间90 min，醇煤质量比5∶1，此时煤样总氧含量为9.29％，脱氧率为61.40％，固相产率为89.62％。在220℃得到的液相产物中，80％左右为芳香族类化合物，酚类和酯类含氧化合物体积分数低于5％，其他含氧类化合物11.29％。270℃得到的液相产率中芳香族类化合物体积分数降低31.69％，含氧类化合物体积分数增加2.81％，酚类和酯类含氧化合物增至35％左右。褐煤经超临界醇解后，乙醇与煤分子作用发生了醚氧桥键的断裂反应，煤分子发生了脱羧反应，液相产物中含有大量酚类(主要为苯酚及其取代物)和酯类(主要为乙酯类)。
為有效脫除褐煤中含氧官能糰，採用超臨界乙醇工藝處理勝利褐煤，研究溫度、停留時間和醇煤質量比對勝利褐煤脫氧效果的影響，併利用 FT-IR 和 GC / MS 對固液相產物進行錶徵。結果錶明，勝利褐煤超臨界乙醇脫氧的最佳工藝條件為：溫度270℃，停留時間90 min，醇煤質量比5∶1，此時煤樣總氧含量為9.29％，脫氧率為61.40％，固相產率為89.62％。在220℃得到的液相產物中，80％左右為芳香族類化閤物，酚類和酯類含氧化閤物體積分數低于5％，其他含氧類化閤物11.29％。270℃得到的液相產率中芳香族類化閤物體積分數降低31.69％，含氧類化閤物體積分數增加2.81％，酚類和酯類含氧化閤物增至35％左右。褐煤經超臨界醇解後，乙醇與煤分子作用髮生瞭醚氧橋鍵的斷裂反應，煤分子髮生瞭脫羧反應，液相產物中含有大量酚類(主要為苯酚及其取代物)和酯類(主要為乙酯類)。
위유효탈제갈매중함양관능단，채용초림계을순공예처리성리갈매，연구온도、정류시간화순매질량비대성리갈매탈양효과적영향，병이용 FT-IR 화 GC / MS 대고액상산물진행표정。결과표명，성리갈매초림계을순탈양적최가공예조건위：온도270℃，정류시간90 min，순매질량비5∶1，차시매양총양함량위9.29％，탈양솔위61.40％，고상산솔위89.62％。재220℃득도적액상산물중，80％좌우위방향족류화합물，분류화지류함양화합물체적분수저우5％，기타함양류화합물11.29％。270℃득도적액상산솔중방향족류화합물체적분수강저31.69％，함양류화합물체적분수증가2.81％，분류화지류함양화합물증지35％좌우。갈매경초림계순해후，을순여매분자작용발생료미양교건적단렬반응，매분자발생료탈최반응，액상산물중함유대량분류(주요위분분급기취대물)화지류(주요위을지류)。
In order to remove the oxygen-containing functional groups in lignite,the Shengli lignite was treated through supercritical etha-nol process.The influence of the temperature,residence time and ratio of ethanol and coal on the deoxygenation was researched.The FT-IR and GC/ MS were used to characterize the solid and liquid products.The results showed that the optimal deoxygenation condition of super-critical ethanol deoxygenation was temperature 270 ℃ ,residence time 90 minutes and the mass ratio of alcohol to coal 5 ∶ 1,and the total oxygen content was 9.29%,the deoxygenation rate was 61.40%,the solid yield was 89.62%.In the liquid product which was obtained at 220 ℃ ,the content of aromatic compounds was about 80%,the content of phenols and ester compounds was less than 5%,the other oxygen-containing compounds was 11.29%.However,in the liquid product which was obtained at 270 ℃ ,the content of aromatic compounds was decreased by 31.69%,the volume fraction of oxygen containing compounds was increased by 2.81%,the content of phenols and ester com-pounds was increased to about 35%.Ether oxygen bonds were broken up during supercritical ethanol,there were large amount of phenolsin in which phenol and its derivatives were the main components and esters,mainly ethyl esters in liquid products.
