化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2014年
8期
2066-2071
,共6页
甲醇%催化剂%溶胶-凝胶%全氟磺酸树脂%二甲醚
甲醇%催化劑%溶膠-凝膠%全氟磺痠樹脂%二甲醚
갑순%최화제%용효-응효%전불광산수지%이갑미
methanol%catalyst%sol-gel%perfluorosulfonate resin(PFSA)%dimethyl ether
采用溶胶-凝胶法制备了用于甲醇气相脱水制二甲醚的新型催化剂全氟磺酸树脂/二氧化硅，应用X射线衍射、红外光谱、热重-差示扫描量热、低温氮物理吸附和氨程序升温脱附法对所得催化剂进行了表征。考察了反应温度、甲醇液空速、全氟磺酸树脂含量对甲醇气相催化脱水制二甲醚反应性能和催化剂稳定性的影响。结果表明，催化剂比表面积达820m2/g，在全氟磺酸树脂负载量10.0%、甲醇液空速1h-1、反应温度184℃时，甲醇转化率92.0%，二甲醚选择性99.9%，经350h实验测试，活性和稳定性没有明显变化。
採用溶膠-凝膠法製備瞭用于甲醇氣相脫水製二甲醚的新型催化劑全氟磺痠樹脂/二氧化硅，應用X射線衍射、紅外光譜、熱重-差示掃描量熱、低溫氮物理吸附和氨程序升溫脫附法對所得催化劑進行瞭錶徵。攷察瞭反應溫度、甲醇液空速、全氟磺痠樹脂含量對甲醇氣相催化脫水製二甲醚反應性能和催化劑穩定性的影響。結果錶明，催化劑比錶麵積達820m2/g，在全氟磺痠樹脂負載量10.0%、甲醇液空速1h-1、反應溫度184℃時，甲醇轉化率92.0%，二甲醚選擇性99.9%，經350h實驗測試，活性和穩定性沒有明顯變化。
채용용효-응효법제비료용우갑순기상탈수제이갑미적신형최화제전불광산수지/이양화규，응용X사선연사、홍외광보、열중-차시소묘량열、저온담물리흡부화안정서승온탈부법대소득최화제진행료표정。고찰료반응온도、갑순액공속、전불광산수지함량대갑순기상최화탈수제이갑미반응성능화최화제은정성적영향。결과표명，최화제비표면적체820m2/g，재전불광산수지부재량10.0%、갑순액공속1h-1、반응온도184℃시，갑순전화솔92.0%，이갑미선택성99.9%，경350h실험측시，활성화은정성몰유명현변화。
A new catalyst perfluorosulfonate resin/SiO2 for vapor phase dehydration of methanol(Me) to dimethyl ether(DME) was prepared by sol-gel method. The as-prepared catalyst was characterized by X-ray diffraction,Fourier transform infrared spectroscopy,thermogravimetry-dirfferential scanning calorimetry , low-temperature nitrogen adsorption method and NH3 temperature-programmed desorption. The effects of reaction conditions such as temperature,liquid hourly space velocity (LHSV) and active component content on the reaction performance and catalyst stability were investigated. The results indicated that the BET specific surface area of microporous catalyst was 820m2/g. After a continuous run under conditions:w(PFSA)=10.0%,LHSV(Me)=1h-1,t=184℃,it is found that the activity and stability of the catalyst kept steady with the Me conversion,DME selectivity being>91.5%,>99.9%respectively.
