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首页> 外文期刊>Catalysis science & technology >Recovery of the polymers formed during thermal cracking of N-substituted dicarbamates over Fe-Ni/Al2O3
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Recovery of the polymers formed during thermal cracking of N-substituted dicarbamates over Fe-Ni/Al2O3

机译：复苏在热形成的聚合物开裂的n - dicarbamates结束Fe-Ni / Al2O3

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摘要

The thermal cracking behavior of diethyl hexamethylenedicarbamate (EHDC) was investigated in this work. The polymers formed under different conditions were analyzed by IR and TG, indicating that the polymers were mixtures of EHDC, polyureas, imines and others. The polymers could be converted to EHDC by a simple alcoholysis reaction for the first time over Fe-Ni/Al2O3 catalysts. Under the optimized reaction conditions, the yield of EHDC could reach up to 52% with 99% selectivity over 8% Fe-3% Ni/Al2O3 catalysts. The catalysts were extensively characterized by BET, XPS, XRD, SEM, TEM, H-2-TPR and NH3-TPD, showing that the interaction effect between Fe species and Ni species may be attributed to high catalytic performance of the catalyst. Meanwhile, the loss of active components resulted in decreased catalytic activity.
机译：二乙酯的热裂解行为hexamethylenedicarbamate (EHDC)调查在这工作。条件分析了IR和TG,指示EHDC聚合物的混合物,聚脲、亚胺等。由一个简单的醇解转化为EHDC反应在首次Fe-Ni /氧化铝催化剂。条件,EHDC的产量可以达到52%与99%选择性fe - 3%镍/氧化铝8%以上催化剂。特点是打赌,XPS, XRD, SEM, TEM, H-2-TPRNH3-TPD,表明互动的效果倪铁物种和物种之间归因于的高催化性能催化剂。导致降低催化组件活动。

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