The purpose of this study is to investigate the characteristics of soot particles in C2H4/CO2/O2/N2 com- bustion at equivalence ratio of 3.0-5.0. As the oxidant is switched from conventional air to CO2/O2/N2 mixture, ...The purpose of this study is to investigate the characteristics of soot particles in C2H4/CO2/O2/N2 com- bustion at equivalence ratio of 3.0-5.0. As the oxidant is switched from conventional air to CO2/O2/N2 mixture, the key species C2H2, C3H3 responsible for formation of first aromatic ring, the apical aromatics and 4zring aromatics total production rate all decrease greatly. In addition, with CO2 mole fraction from 0.2 to 0.5 in the mixture, the soot particle number density, volume fraction, surface area density, which are three most important parameters to soot oarticle orooertv, are suooressed obviously. Furthermore, the increasing content of C02 in the oxidizer influences mostly H, OH radical concentrations by two reactins CO ＋ OH == CO2＋ H and H ＋ O2===O＋ OH, and the procluction rate ofvo reactions declined, which revealed that C02 in mixture has an inhibiting ef- fect on soot particle generation.展开更多
According to the research theory of improved black oil simulator,a practical mathematical model for CO2 miscible flooding was presented.In the model,the miscible process simulation was realized by adjusting oil/gas re...According to the research theory of improved black oil simulator,a practical mathematical model for CO2 miscible flooding was presented.In the model,the miscible process simulation was realized by adjusting oil/gas relative permeability and effective viscosity under the condition of miscible flow.In order to predict the production performancefast,streamline method is employed to solve this model as an alternative to traditional finitedifference methods.Based on streamline distribution of steady-state flow through porous media with complex boundary confirmed with the boundary element method(BEM),an explicit total variation diminishing(TVD)method is used to solve the one-dimensional flow problem.At the same time,influences of development scheme,solvent slug size,and injection periods on CO2 drive recovery are discussed.The model has the advantages of lessinformation need,fast calculation,and adaptation to calculate CO2 drive performance of all kinds of patterns in a random shaped porous media with assembly boundary.It can be aneffective tool for early stage screening and reservoir dynamic management of the CO2miscible oil field.展开更多
基金＊ Supported by the National Natural Science Foundation of China （51176181）, the National Basle Research of China （2012CB719704）, and the National Key Technology Research and Development Program Of China （2011BAK07B01）.
文摘The purpose of this study is to investigate the characteristics of soot particles in C2H4/CO2/O2/N2 com- bustion at equivalence ratio of 3.0-5.0. As the oxidant is switched from conventional air to CO2/O2/N2 mixture, the key species C2H2, C3H3 responsible for formation of first aromatic ring, the apical aromatics and 4zring aromatics total production rate all decrease greatly. In addition, with CO2 mole fraction from 0.2 to 0.5 in the mixture, the soot particle number density, volume fraction, surface area density, which are three most important parameters to soot oarticle orooertv, are suooressed obviously. Furthermore, the increasing content of C02 in the oxidizer influences mostly H, OH radical concentrations by two reactins CO ＋ OH == CO2＋ H and H ＋ O2===O＋ OH, and the procluction rate ofvo reactions declined, which revealed that C02 in mixture has an inhibiting ef- fect on soot particle generation.
文摘According to the research theory of improved black oil simulator,a practical mathematical model for CO2 miscible flooding was presented.In the model,the miscible process simulation was realized by adjusting oil/gas relative permeability and effective viscosity under the condition of miscible flow.In order to predict the production performancefast,streamline method is employed to solve this model as an alternative to traditional finitedifference methods.Based on streamline distribution of steady-state flow through porous media with complex boundary confirmed with the boundary element method(BEM),an explicit total variation diminishing(TVD)method is used to solve the one-dimensional flow problem.At the same time,influences of development scheme,solvent slug size,and injection periods on CO2 drive recovery are discussed.The model has the advantages of lessinformation need,fast calculation,and adaptation to calculate CO2 drive performance of all kinds of patterns in a random shaped porous media with assembly boundary.It can be aneffective tool for early stage screening and reservoir dynamic management of the CO2miscible oil field.
