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金属有机骨架化合物衍生镍/碳复合材料催化C_(9)石油树脂加氢反应研究 被引量:2
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作者 傅佳伟 吴承洪 +4 位作者 何瑶靓 邓凯熙 邹杰忠 陈小鹏 王琳琳 《精细石油化工》 CAS 2022年第6期38-43,共6页
采用助剂修饰合成金属有机骨架基化合物PVP-Ni-MOFs,经N_(2)气氛退火制备了Ni/C-400催化剂。采用FT-IR、XRD、TEM、SEM、N_(2)吸附-脱附等对催化剂进行结构与性能表征,考察了Ni/C-400催化C_(9)石油树脂加氢反应中温度、H_(2)压力以及时... 采用助剂修饰合成金属有机骨架基化合物PVP-Ni-MOFs,经N_(2)气氛退火制备了Ni/C-400催化剂。采用FT-IR、XRD、TEM、SEM、N_(2)吸附-脱附等对催化剂进行结构与性能表征,考察了Ni/C-400催化C_(9)石油树脂加氢反应中温度、H_(2)压力以及时间对反应体系溴值的影响。结果表明:Ni/C-400具有大量介孔结构,助剂聚乙烯吡咯烷酮(PVP)促进了Ni在碳载体上的分散;在Ni/C-400用量0.25 g、H_(2)压力6 MPa、温度210℃最佳条件下反应2 h,石油树脂的溴值降至1.3 g/100 g,氢化率达95.44%;催化剂经5次循环后,产物的溴值为1.5 g/100 g,表明Ni/C-400具有良好的催化加氢活性和较高的稳定性。 展开更多
关键词 石油树脂 金属有机骨架 金属有机骨架材料衍生镍/碳材料 催化加氢
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Markov skeleton processes 被引量:9
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作者 Hou Zhenting Liu Zaiming zou jiezhong 《Chinese Science Bulletin》 SCIE EI CAS 1998年第11期881-889,共9页
A new class of stochastic processes--Markov skeleton processes is introduced, which have the Markov property on a series of random times. Markov skeleton processes include minimal Q processes, Doob processes, Q proces... A new class of stochastic processes--Markov skeleton processes is introduced, which have the Markov property on a series of random times. Markov skeleton processes include minimal Q processes, Doob processes, Q processes of order one, semi-Markov processes , piecewise determinate Markov processes , and the input processes, the queuing lengths and the waiting times of the system GI/G/1, as particular cases. First, the forward and backward equations are given, which are the criteria for the regularity and the formulas to compute the multidimensional distributions of the Markov skeleton processes. Then, three important cases of the Markov skeleton processes are studied: the (H, G, Π)-processes, piecewise determinate Markov skeleton processes and Markov skeleton processes of Markov type. Finally, a vast vistas for the application of the Markov skeleton processes is presented. 展开更多
关键词 MARKOV SKELETON MARKOV SKELETON PROCESS (H Q)-process the NORMAL Morkov SKELETON process.
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