新型甲醇合成联醇催化剂XNC208投入中试生产

新型甲醇合成联醇催化剂ＸＮＣ２０８投入中试生产（ＥｎｌａｒｇｅｄＰｒｏｄｕｃｔｉｏｎｏｆＸＮＣ２０８ＣａｔａｌｙｓｔｆｏｒＭｅｔｈａｎｏｌＳｙｎ０ｔｈｅｓｉｓ）杨意泉，张鸿斌，林国栋，车长针（厦门大学化学系）潘章文，龚鑫荣，董远群，陈雷（南京催化剂厂..

新型甲醇合成联醇催化剂XNC208投入中试生产

新型甲醇合成联醇催化剂ＸＮＣ２０８投入中试生产（ＥｎｌａｒｇｅｄＰｒｏｄｕｃｔｉｏｎｏｆＸＮＣ２０８ＣａｔａｌｙｓｔｆｏｒＭｅｔｈａｎｏｌＳｙｎ０ｔｈｅｓｉｓ）杨意泉，张鸿斌，林国栋，车长针（厦门大学化学系）潘章文，龚鑫荣，董远群，陈雷（南京催化剂厂..

Spectroscopic Characterization of the Active Site of NC208 Modified Copper-based Catalyst for Methanol Synthesis

联系人及第一作者:杨意泉,男,51 岁,副教授.[中文文摘]利用XRD和FTIR等谱学方法，对改进型铜基联醇催化剂NC208和工业催化剂C207的活性相进行了谱学表征．实验结果表明，联醇铜基甲醇含成催化剂的活性中心可能是添加少量金属氧化物助剂的改进型NC208催化剂工作表面Cu＋活性位的浓度比Cu－Zn－Al三组份工业催化剂C207高；NC208催化剂能维持工作表面具有较大的Cu＋／Cu0比，即维持较高的Cu＋价态稳定性，这与该催化剂的活性和热稳定性明显优于C207有着密切联系。[英文文摘]Spectroscopic characterization of the active base of an industrial catalysts and NC208 modlfied copper-based catalysts for methanol synthesis has been carried out by means of XRD and FTIR rnethods. The experimental results showed that active site on functioning copper-based catalysts for methanol synthesis is probably and that the surface concentration of Cu+-site on functioning NC208, prepared by adding small amount of the metal oxide MOx. to industrial catalyst C207, was higher than that of C207 catalyst,and that the surface of functioning NC208 catalyst had higher Cu+/Cu0 ratio and valence stability than that of C207.These peculiarities have close a relation with more persistent activity and higher thermal stability than modified NC208 catalyst.南京催化剂厂资助开发课

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies