An extensive database (946 measurements) for the frequency of pulsing flow in trickle beds was established by collecting the experimental results published over past 30 years. A new correlation based on artificial neural network (ANN) to predict the pulsation frequency was developed. Seven dimensionless numbers (groups) employed in the proposed correlation were liquid and gas Reynolds, liquid Weber, liquid Eotvos, gas Froude, and gas Stokes numbers and a bed correction factor. The comparisons of performance reported in the of literature and present correlations show that ANN correlation is a significant improvement in predicting pulsation frequency with an solute relative error (AARE) of 10% and a standard deviation less than 18%

以Cr（NO3）3为Cr源用水热法合成了Cr-AIPO4-5分子筛，并用CDE，FT-IR和CBH对分子筛进行了表征，结果表明，已进入到Cr-AIPO4-5分子筛骨架结构中；焙烧后分子筛样品的L酸中心和B酸中心数量均大幅度增加，Cr主要以Cr（V）形式存在,将分子筛样品用于催化H2O2氧化苯制苯酚反应，苯酚收率最高可达4.7%，选择性可达99.5%以上。非骨架Cr物种是导致H2O2无效分解和选择性下降的主要因素，而骨架Cr物种是反应的活性中心，提出了以骨架Cr过氧化物为中间物种的可能的反应机理，并用原位红外光谱初步验证了中间物种的存在。

以水热法合成了铜磷铝分子筛（Cu-AIPO4-5），并用XRD，ICP，SEM，FT-IR，NH3-TPD，H2-TPR，ESR和N2吸附脱附等手段对样品进行了表征结果表明，所合成的Cu-AIPO4-5分子筛具有AFI拓扑结构，结晶度高，无结晶态杂质；Cu2+进入到分子筛的骨架结构中，并使其Lewis酸和Brosled酸中心数量增加，弱酸性中心大大增强，强酸性中心消失；样品中的Cu存在多种形式，以骨架Cu物种为主，还存在有骨架外Cuo和双核Cu物种，部分样品具有缺陷结构Cu-AIPO4-5分子筛中存在着骨架Cu和缺陷结构两种可能的活性中心，对苯液相氧化具有良好的催化性能，苯酚选择性可达96%，收率可达6.9%

A periodic packing mode of trickle-bed reactor (TBR) for the gas limited reaction was proposed. Hydrogenation of 2-ethylanthraquinone over Pd/Al2O3 in a laboratory-scale TBR was taken as a test reaction for determining whether the periodic packing mode is advantageous. The effects of operating conditions and packing type on TBR performance were experimentally examined to demonstrate the cause-effect relationships. A mathematic model of TBR considering axial dispersion and fractional wetting was developed to quantitatively illuminate the reason of performance enhancement.

Anthraquinone working solutions used in hydrogen peroxide manufacture were selected as the test system to investigate the flow pattern transition behavior of foaming system in the trickle bed reactor (TBR) with the method of measurement and analysis of the instantaneous pressure drop fluctuations. The boundaries and the corresponding flow map for the foaming system were established for TBR packed with different size particles. It was found that the size of particles shows significant effect on the flow regime distributions. A theoretical model proposed by Cheng and Yuan and an empirical correlation by Bartelmus and Janecki were used to predict boundaries of the flow pattern transition for anthraquinone working solutions. Comparison between estimation and experimental results showed that the predicted boundaries of Cheng and Yuan theoretical model are consistent with the observations in the present work.