A microreactor system was used to study the catalytic reaction of NO+CO→1/2 N_2+CO_2 over Cu,Fe, Mn,Cr,and Ce oxides supported on alumina,and the effect of adding Ce in supported Cu-M-O(M=Mn,Fe and Cr) catalysts on t...A microreactor system was used to study the catalytic reaction of NO+CO→1/2 N_2+CO_2 over Cu,Fe, Mn,Cr,and Ce oxides supported on alumina,and the effect of adding Ce in supported Cu-M-O(M=Mn,Fe and Cr) catalysts on their catalytic activities for the topic reaction and the concentration of N_2O produced.It was found that the catalytic activity order of the single-element oxide is:CuO>Fe_2O_3≈Cr_2O_3> MnO_2>CeO_2>NiO.Cu-Mn-O is more active than CuO,and Cu-Fe-O is more active than Cu-Mn-O and Cu-Cr-O for NO+CO reaction.This study shows that the addition of Ce in supported Cu-M-O can promote their catalytic activities Jot the topic reaction,which makes the reaction of 2NO+CO→N_2O+CO_2 fast,and N_2O is an intermediate compound produced during NO+CO reaction.展开更多
为实现特定形貌CuO纳米材料的温和可控合成,增强该材料作为电化学催化剂的催化活性,利用亚铜离子在碱性溶液中的氧化沉淀反应,制备了形貌均一稳定的CuO纳米片层。采用粉末X射线衍射、扫描电子显微镜、透射电子显微镜、X射线光电子能谱...为实现特定形貌CuO纳米材料的温和可控合成,增强该材料作为电化学催化剂的催化活性,利用亚铜离子在碱性溶液中的氧化沉淀反应,制备了形貌均一稳定的CuO纳米片层。采用粉末X射线衍射、扫描电子显微镜、透射电子显微镜、X射线光电子能谱与电化学催化反应等手段,研究了不同合成参数对产物的形貌、价态与电化学催化性能的影响。研究结果表明:当产物投料比为0.01 g CuCl/10 mL TBAOH时,产物的电化学催化性质最好;在200℃下煅烧后,催化性能得到进一步提高。利用具有特殊分子结构的四丁基氢氧化铵作为模板剂,能够实现CuO纳米片层的简单、快速、温和制备;同时,产物中低价态Cu离子的存在可提高催化剂的电化学催化活性。通过煅烧提高产物的结晶性,能够进一步增强材料的电化学催化活性。展开更多
采用化学共沉淀方法制备了铜氧化物催化剂FAH-1。在30 m L绝热微型固定床反应器上,研究了催化剂催化糠醇加氢制备1,2-戊二醇的性能,并对相关工艺条件进行了考察。实验结果表明:FAH-1催化剂表现出良好的糠醇加氢活性和选择性,在反应温度...采用化学共沉淀方法制备了铜氧化物催化剂FAH-1。在30 m L绝热微型固定床反应器上,研究了催化剂催化糠醇加氢制备1,2-戊二醇的性能,并对相关工艺条件进行了考察。实验结果表明:FAH-1催化剂表现出良好的糠醇加氢活性和选择性,在反应温度为160℃、反应压力为6 MPa、液时体积空速为0.3 h-1、氢油体积比为10 000∶1条件下,糠醇加氢反应的转化率和选择性分别为91.80%和41.52%,1,2-戊二醇单程收率达到38.12%,1 000 h长周期评价催化剂性能稳定。制得的1,2-戊二醇样品纯度高、质量好,满足后续加工对1,2-戊二醇的质量要求。反应过程采用固定床反应器,具有较好的工业化前景。展开更多
文摘A microreactor system was used to study the catalytic reaction of NO+CO→1/2 N_2+CO_2 over Cu,Fe, Mn,Cr,and Ce oxides supported on alumina,and the effect of adding Ce in supported Cu-M-O(M=Mn,Fe and Cr) catalysts on their catalytic activities for the topic reaction and the concentration of N_2O produced.It was found that the catalytic activity order of the single-element oxide is:CuO>Fe_2O_3≈Cr_2O_3> MnO_2>CeO_2>NiO.Cu-Mn-O is more active than CuO,and Cu-Fe-O is more active than Cu-Mn-O and Cu-Cr-O for NO+CO reaction.This study shows that the addition of Ce in supported Cu-M-O can promote their catalytic activities Jot the topic reaction,which makes the reaction of 2NO+CO→N_2O+CO_2 fast,and N_2O is an intermediate compound produced during NO+CO reaction.
文摘为实现特定形貌CuO纳米材料的温和可控合成,增强该材料作为电化学催化剂的催化活性,利用亚铜离子在碱性溶液中的氧化沉淀反应,制备了形貌均一稳定的CuO纳米片层。采用粉末X射线衍射、扫描电子显微镜、透射电子显微镜、X射线光电子能谱与电化学催化反应等手段,研究了不同合成参数对产物的形貌、价态与电化学催化性能的影响。研究结果表明:当产物投料比为0.01 g CuCl/10 mL TBAOH时,产物的电化学催化性质最好;在200℃下煅烧后,催化性能得到进一步提高。利用具有特殊分子结构的四丁基氢氧化铵作为模板剂,能够实现CuO纳米片层的简单、快速、温和制备;同时,产物中低价态Cu离子的存在可提高催化剂的电化学催化活性。通过煅烧提高产物的结晶性,能够进一步增强材料的电化学催化活性。
