2-D porous flow field reveals different EOR mechanisms between the biopolymer and chemical polymer

2022 ◽  
Vol 210 ◽  
pp. 110084
Author(s):  
Hua Li ◽  
Weiyao Zhu ◽  
Hao Niu ◽  
Yubao Gao ◽  
Zhen Chen ◽  
...  
Keyword(s):  
Author(s):  
Wei Yuan ◽  
Fuchang Han ◽  
Yu Chen ◽  
Wenjun Chen ◽  
Jinyi Hu ◽  
...  

Water management is a critical issue for a direct methanol fuel cell (DMFC). This study focuses primarily on the use of a super-hydrophilic or super-hydrophobic cathode porous flow field to improve the water management of a passive air-breathing DMFC. The flow field layer was made of an in-house copper-fiber sintered felt (CFSF) which owns good stability and conductivity. Results indicate that the super-hydrophilic flow field performs better at a lower methanol concentration since it facilitates water removal when the water balance coefficient (WBC) is high. In the case of high-concentration operation, the use of a super-hydrophobic pattern is more able to reduce methanol crossover (MCO) and increase fuel efficiency since it helps maintain a lower WBC due to its ability in enhancing water back flow from the cathode to the anode. The effects of methanol concentration and the porosity of the CFSF are also discussed in this work. The cell based on the super-hydrophobic pattern with a porosity of 60% attains the best performance with a maximum power density of 18.4 mW cm−2 and a maximum limiting current density of 140 mA cm−2 at 4 M.


2014 ◽  
Vol 2014.53 (0) ◽  
pp. 75-76
Author(s):  
Motoki YAEHARA ◽  
Kengo SUZUKI ◽  
Yutaka TABE ◽  
Takemi CHIKAHISA

2014 ◽  
Vol 472 ◽  
pp. 1112-1116
Author(s):  
Zuo Cai Liao ◽  
Zheng Ming Yang ◽  
Qian Hua Xiao

Aimed at ultra-low permeability reservoir, the large natural outcrop model has been made for researching the oil reservoirs porous flow law deeply, and the inverted nine-spot equilateral well pattern also has been designed which is the commonest well patter during the oilfield exploitation. The flow fields have been measured during the experiment in different displacing period (0.3PV, 0.6PV and 1PV). The research shows that fluid flow has obvious directivity, and it strongly affected by heterogeneity of the reservoir. In addition, the regions between the edge production wells are much more difficult to be exploited.


2012 ◽  
Vol 160 (2) ◽  
pp. F119-F128 ◽  
Author(s):  
L. J. Zheng ◽  
A. K. Srouji ◽  
R. Dross ◽  
A. Turhan ◽  
M. M. Mench

2011 ◽  
Vol 110-116 ◽  
pp. 1996-2003
Author(s):  
Jian Long Xiu ◽  
Li Yu

To successfully simulate the anaerobic metabolic process of Indigenous Microbial Enhanced Oil Recovery (IMEOR) and reduce the risk of practice test, a new mathematical model was established for porous flow field-microbial field coupling in anaerobic metabolic process according to the study on anaerobic microbe chain composed of fermentative bacteria, nitrate reducing bacteria, sulfate reducing bacteria and methanogen, and the solution of this model was given. The effect of IMEOR in anaerobic metabolic process relies on the regulation of microbe community. Equations about porous flow field affected by microbe in the model not only elaborate the impacts of microbe and three primary metabolic products (bio-surfactant, bio-polymer, bio-gas) on physical parameters, but also reflect the main mechanisms (emulsification, profile modification and viscosity reduction) for microbial enhanced oil recovery. Equations in microbial field influenced by fluid flow could indicate the substance distribution decided by fluid flow and the collaborative metabolism relationship on biological chain formed by microbe community. The coupling of porous flow field and microbial field should be solved together. The model supplies theoretical basis for the study on IMEOR mathematical model software.


2012 ◽  
Vol 159 (7) ◽  
pp. F267-F277 ◽  
Author(s):  
L. J. Zheng ◽  
A. K. Srouji ◽  
A. Turhan ◽  
M. M. Mench

2008 ◽  
Vol 2008.13 (0) ◽  
pp. 249-250
Author(s):  
Masaya KOZAKAI ◽  
Tsutomu OKUSAWA ◽  
Hiroyuki SATAKE ◽  
Ko TAKAHASHI ◽  
Yutaka TABE ◽  
...  

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