The surface of activated carbon（AC） was improved with chemical modification by HNO3 oxidation and loading with metallic ions.The adsorption property for organic sulfur complexes in gasoline was studied.The results s...The surface of activated carbon（AC） was improved with chemical modification by HNO3 oxidation and loading with metallic ions.The adsorption property for organic sulfur complexes in gasoline was studied.The results show that the surface acidity groups of activated carbon increase considerably by HNO3 treatment.The carboxyl groups increase 1117 times by 4mol/L8mol/L nitric acid than by 0.5mol/L one.The BET surface area（SBET） of AC decreases from 667.6m2·g-1 to 372m2·g-1.After loading with metallic ions the SBET of AC decreases in different extent.The adsorbing ability of a sulfur compound will be better by choose of loading a specific metallic ions based on the characters of organic sulfur complexes.The AC loading with Fe3+ exhibits a good adsorption performance,with removal ratio of 85.1%,to sulfur complexes of thiophene that is difficult to be removed from gasoline.展开更多
选用6种传统沥青和6种改性沥青,利用Strategic Highway Research Program(SHRP)试验方法研究了沥青的温度敏感性评价指标。中高温区间利用动态剪切流变仪评价沥青温度敏感性,使用弯曲梁流变仪评价沥青在低温区间的温度敏感性,高温区间...选用6种传统沥青和6种改性沥青,利用Strategic Highway Research Program(SHRP)试验方法研究了沥青的温度敏感性评价指标。中高温区间利用动态剪切流变仪评价沥青温度敏感性,使用弯曲梁流变仪评价沥青在低温区间的温度敏感性,高温区间沥青的温度敏感性采用旋转粘度仪评价。结果表明SHRP试验得到的试验数据物理意义明确,用来评价沥青的温度敏感性具有明显优势。同时SHRP试验方法可以分不同温度区间对道路沥青的温度敏感性进行评价;中高温度区间推荐使用模量指数作为评价沥青温度敏感性的指标;高温区间下推荐使用粘温曲线斜率作为沥青的温度敏感性评价指标;负温区间推荐使用劲度指数来评价沥青的温度敏感性。展开更多
文摘The surface of activated carbon（AC） was improved with chemical modification by HNO3 oxidation and loading with metallic ions.The adsorption property for organic sulfur complexes in gasoline was studied.The results show that the surface acidity groups of activated carbon increase considerably by HNO3 treatment.The carboxyl groups increase 1117 times by 4mol/L8mol/L nitric acid than by 0.5mol/L one.The BET surface area（SBET） of AC decreases from 667.6m2·g-1 to 372m2·g-1.After loading with metallic ions the SBET of AC decreases in different extent.The adsorbing ability of a sulfur compound will be better by choose of loading a specific metallic ions based on the characters of organic sulfur complexes.The AC loading with Fe3+ exhibits a good adsorption performance,with removal ratio of 85.1%,to sulfur complexes of thiophene that is difficult to be removed from gasoline.
文摘选用6种传统沥青和6种改性沥青,利用Strategic Highway Research Program(SHRP)试验方法研究了沥青的温度敏感性评价指标。中高温区间利用动态剪切流变仪评价沥青温度敏感性,使用弯曲梁流变仪评价沥青在低温区间的温度敏感性,高温区间沥青的温度敏感性采用旋转粘度仪评价。结果表明SHRP试验得到的试验数据物理意义明确,用来评价沥青的温度敏感性具有明显优势。同时SHRP试验方法可以分不同温度区间对道路沥青的温度敏感性进行评价;中高温度区间推荐使用模量指数作为评价沥青温度敏感性的指标;高温区间下推荐使用粘温曲线斜率作为沥青的温度敏感性评价指标;负温区间推荐使用劲度指数来评价沥青的温度敏感性。
