Optimization of an Acid-Dissolution Front-End Process to Produce a Feed for the Current Mo-99 Recovery Processes

2014 ◽  
Author(s):  
J. Jerden ◽  
J. Bailey ◽  
L. Hafenrichter ◽  
G.F. Vandegrift
Keyword(s):  
Acid Dissolution ◽  
Recovery Processes ◽  
Front End ◽  
Dissolution Front

scholarly journals MANAGING SERVICE RECOVERY PROCESSES: THE ROLE OF CUSTOMER'S AGE / VARTOTOJŲ AMŽIAUS ĮTAKA PASLAUGŲ VERTINIMUI

2011 ◽  
Vol 12 (3) ◽  
pp. 503-528 ◽  
Author(s):  
Jesús Cambra-Fierro ◽  
Juan M. Berbel-Pineda ◽  
Rocío Ruiz-Benítez ◽  
Rosario Vazquez-Carrasco
Keyword(s):  
Process Management ◽  
Service Providers ◽  
Service Recovery ◽  
Recovery Process ◽  
Effective Management ◽  
Research And Practice ◽  
Recovery Processes ◽  
Front End ◽  
Effective Service

Research and practice show that effective management of service recovery processes boosts customer satisfaction. Under this assumption, the purpose of this paper is to analyze a set of factors which may determine satisfaction with recovery processes and loyalty. We also analyze the role of age as potential moderating. Segmenting customers' samples by age may potentially contribute to more effective service recovery process management. Older customers seem to be more loyal when dealing with service providers than younger customers, while younger customers are more demanding in terms of companies' efforts. Implications for both literature and practice are included at the front-end of the paper. Santrauka Tiek moksliniai tyrimai, tiek ir praktika rodo, kad grąžinimo procesų valdymo veiksmingumas skatina klientų pasitenkinimą. Remiantis šia prielaida, straipsnio tikslas yra išanalizuoti veiksnius, turinčius įtakos klientų pasitenkinimo lygiui ir lojalumui. Taip pat analizuojamas ir vartotojų amžiaus rodiklis, jo potencialo kaita. Atsižvelgiant į tai, klientai buvo sugrupuoti pagal amžių ir buvo analizuojama, kaip vieni ar kiti procesai juos veikia. Atliktas tyrimas parodė, kad vyresnio amžiaus klientai yra labiau ištikimi nei jaunesni, o jaunesni klientai yra reiklesni įmonių teikiamoms paslaugoms.

Simulation of Dissolution Front Propagation During Acid Injection Into Porous Media: A CFD Approach

2018 ◽  
Author(s):  
Elsayed Abdelfatah ◽  
Maysam Pournik ◽  
David Craig
Keyword(s):  
Porous Media ◽  
Reaction Rate ◽  
Surface Reaction ◽  
Injection Pressure ◽  
Fluid Temperature ◽  
Thermal Interaction ◽  
Acid Dissolution ◽  
Acid Rock ◽  
Rock Interaction ◽  
Dissolution Front

Acid is often injected into porous media to dissolve rock material and enhance flow capability of the rock. Most simulation studies on the propagation of the dissolution front are based on constant injection rate (CIR). Therefore, the objective of this work is to develop numerical model to study acid dissolution front under constant injection pressure (CIP) and also incorporate the effect of fluid temperature on acid–rock interaction. Commercial computational Fluid Dynamics (CFD) software (ANSYS Fluent) is used to solve three-dimensional acid-rock interaction model in cylindrical coordinates. In this work, correlated porosity and permeability distributions are generated. Effect of heat transfer between the injected fluid and the formation on fluid properties and surface reaction rate are accounted for in the model. The study confirmed that all types of acid dissolution patterns exist during constant injection pressure. CIP technique requires lower acid volume to achieve breakthrough in the conical and branched dissolution regimes, than that is required for CIR technique. In dominant wormhole pattern, both techniques require nearly the same acid volume to breakthrough. Thermal interaction between the injected fluid and the formation leads to change of surface reaction rate and physical properties of the fluid, such as viscosity, density, and diffusivity. Injection of cold fluid into heated formation leads to a higher wormhole density as found from experimental studies due to retardation of surface reaction rate. The model developed in this work accurately captures different dissolution patterns. The model shows that the acid volume required for wormhole breakthrough depends on the inlet conditions (CIR or CIP) and the thermal interaction between the injected fluid and formation. This modeling study attempts to answer the critical questions pertaining to the effect of temperature and injection conditions on acid-rock interaction.

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