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Runyu Ma
Beijing University of Chemical Technology
21Publications
13H-index
1,460Citations
Publications 21
Newest
#1Dongjie Lin (Huada: Beijing University of Chemical Technology)H-Index: 2
#2Zhongwei Ding (Huada: Beijing University of Chemical Technology)H-Index: 10
Last.Runyu Ma (Huada: Beijing University of Chemical Technology)H-Index: 13
view all 4 authors...
Abstract Vapor permeation through dense membrane is regarded as an effectively way to separate volatile organic compounds (VOC) from industrial gas stream. This study proposes a new method to get the solubility and diffusivity of pure VOC vapor in dense membrane. C 5 H 12 , C 6 H 14 and C 7 H 16 were selected as sample VOC components to conduct newly developed sorption experiment with polydimethylsiloxane (PDMS) membrane. For each considered VOC component, its solubility was obtained from measur...
8 CitationsSource
#1Dongjie Lin (Huada: Beijing University of Chemical Technology)H-Index: 2
#2Zhongwei Ding (Huada: Beijing University of Chemical Technology)H-Index: 10
Last.Runyu Ma (Huada: Beijing University of Chemical Technology)H-Index: 13
view all 4 authors...
The modeling of a gas mixture permeating through a polymeric membrane can be achieved by the combination of a mass transfer model with a thermodynamic model. In this study, three model combinations, i.e., the combination of Fick's law with Henry's law (F-H), that of Fick's law with the UNIQUAC equation (F-U), and that of the Maxwell-Stefan equation with the UNIQUAC equation (MS-U), were solved by iteration computer procedure to predict the separation performance of both binary and ternary gas mi...
8 CitationsSource
#1Dongjie Lin (Huada: Beijing University of Chemical Technology)H-Index: 2
#2Zhongwei Ding (Huada: Beijing University of Chemical Technology)H-Index: 10
Last.Runyu Ma (Huada: Beijing University of Chemical Technology)H-Index: 13
view all 4 authors...
Abstract Gas/vapor permeation has become a common method for VOC (volatile organic compound) recovery and CO 2 capture. The spiral-wound membrane module, which has high packing density, has been commonly used in gas/vapor permeation. In this study, the model that suits the spiral-wound PDMS (polydimethylsiloxane) membrane is obtained by using an integral transform from an N–S equation (Navier–Stokes) and a mass transfer differential equation. The predicted results indicate that the concentration...
Source
#1Yanbin Yun (BFU: Beijing Forestry University)H-Index: 6
#2Jianxin Wang (BFU: Beijing Forestry University)H-Index: 1
Last.Anthony G. Fane (UNSW: University of New South Wales)H-Index: 94
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The effects of spacers on flux enhancement of direct contact membrane distillation (DCMD) had been studied for high concentration NaCl aqueous solution. For DCMD experiments, spacers were filled in different channels of the module. The effects of spacers on temperature polarization and concentration polarization were demonstrated. By contrasting different modes of spacers filling channels, it was found that: (1) the coarse spacer enhanced fluxes up to 30% and heat transfer coefficients by approx...
18 CitationsSource
#1Zhongwei Ding (Huada: Beijing University of Chemical Technology)H-Index: 10
#2Liying Liu (Huada: Beijing University of Chemical Technology)H-Index: 9
Last.Runyu Ma (Huada: Beijing University of Chemical Technology)H-Index: 13
view all 4 authors...
This study investigates the growth of fouling resistance and fouling limitation through gas bubbling in concentrating the extract of traditional Chinese medicine (TCM) by direct contact membrane distillation (DCMD). Expressions describing the growth rate of fouling resistance and flux decline in concentrating TCM extract by DCMD were deduced. The predicted flux decline by these expressions accords with obtained experimental results, implying that the growth of fouling layer follows the proposed ...
28 CitationsSource
#1Zhongwei DingH-Index: 10
#2Liying LiuH-Index: 9
Last.Runyu MaH-Index: 13
view all 4 authors...
#1Zhongwei Ding (Huada: Beijing University of Chemical Technology)H-Index: 10
#2Liying Liu (Huada: Beijing University of Chemical Technology)H-Index: 9
Last.Runyu Ma (Huada: Beijing University of Chemical Technology)H-Index: 13
view all 4 authors...
Abstract This study investigates the transport resistance of fouling layer formed during concentrating the extract of traditional Chinese medicine (TCM) by direct contact membrane distillation (DCMD). Empirical equations for calculating the physical properties of TCM extract were combined with the heat transfer equations of DCMD to describe the concentrating process. These equations were solved through an iterative computer program to obtain the thermal resistance of fouling layer and interface ...
15 CitationsSource
#1Liying Liu (Huada: Beijing University of Chemical Technology)H-Index: 9
#2Zhongwei Ding (Huada: Beijing University of Chemical Technology)H-Index: 10
Last.Runyu Ma (Huada: Beijing University of Chemical Technology)H-Index: 13
view all 4 authors...
A mathematical model was developed for the bubbling enhanced microfiltration process, in which a novel submerged hollow fiber membrane module was employed to filtrate yeast suspension. By introducing a parameter, called gas bubbling cleaning efficiency, E, this model can be used to predict the time-dependent filtration performance under different bubbling conditions. As a result, model predicted suction pressure at the outlet of the module agrees with that obtained from experiments. At the same ...
10 CitationsSource
#1Yan Lu (Huada: Beijing University of Chemical Technology)H-Index: 2
#2Zhongwei Ding (Huada: Beijing University of Chemical Technology)H-Index: 10
Last.Runyu Ma (Huada: Beijing University of Chemical Technology)H-Index: 13
view all 5 authors...
This study proposed a novel submerged hollow fiber membrane module to better control membrane fouling in gas bubbling enhanced microfiltration. Using yeast as model particle in water, the performance of this module was tested by measuring the transmembrane pressure under constant flux. It was found that the nozzle size greatly affected the size and shape of created bubbles, and with the increase of the nozzle size and after exceeding one threshold value, the gas flow pattern transformed from bub...
43 CitationsSource
#1Zhongwei Ding (Huada: Beijing University of Chemical Technology)H-Index: 10
#2Liying Liu (Huada: Beijing University of Chemical Technology)H-Index: 9
Last.Zurong Yang (Huada: Beijing University of Chemical Technology)H-Index: 4
view all 5 authors...
Abstract This study applies direct contact membrane distillation (DCMD) to concentrating the extract of traditional Chinese medicine (TCM). The trans-membrane flux under various operation conditions was measured in real-time during concentration process. By decoupling the factors affecting the trans-membrane flux decline, it was found that the observed flux decline throughout the process could be attributed to the membrane fouling, the reduction of water vapor pressure and the increase of transp...
37 CitationsSource
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