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Ga2O3/HZSM-48 for dehydrogenation of propane: Effect of acidity and pore geometry of support
Yingjie Ren,Jie Wang,Yinghong Yue,Zi Gao,Weiming Hua 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.2
The catalytic performance of propane dehydrogenation over HZSM-48 supported Ga2O3 catalysts in the presence of CO2 was investigated, and compared with that of HZSM-5 supported ones. The activity decreases with the increase of Si/Al ratio of catalyst support while the selectivity to propene shows a contrary trend. Ga2O3/HZSM-48 with Si/Al ratio of 130 has the best propene yield of 22%. HZSM-48supported catalysts exhibit higher selectivities to propene than the HZSM-5 supported ones at similar propane conversion, due to their weak acid strength. However, their stabilities are not so good as those of the latters, owing to their more weak acid sites and unidimensional pore structures.
A Bi-Target Based Mobile Relay Selection Algorithm for MCNs
( Huijun Dai ),( Xiaolin Gui ),( Zhaosheng Dai ),( Dewang Ren ),( Yingjie Gu ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.11
Multi-hop cellular networks (MCNs) reduce the transmit power and improve the system performance. Recently, several research studies have been conducted on MCNs. The mobile relay selection scheme is a rising issue in the design of MCNs that achieves these advantages. The conventional opportunistic relaying (OR) is performed on the single factor for maximum signal-to-interference-plus-noise ratio (SINR). In this paper, a comprehensive OR scheme based on Bi-Target is proposed to improve the system throughput and reduce the relay handover by constraining the amount of required bandwidth and SINR. Moreover, the proposed algorithm captures the variability and the mobility that makes it more suitable for dynamic real scenarios. Numerical and simulation results show the superiority of the proposed algorithm in both enhancing the overall performance and reducing the handover.