Multivariate statistical methods for the analysis, monitoring and diagnosis of process operating performance are becoming more important because of the availability of on-line process computers which routinely collect measurements on large numbers of process variables. Traditional univariate control charts have been extended to multivariate quality control situations using the Hotelling T2 stat...

The recovery of metal values and safe disposal of spent catalyst is gaining interest due to both its hazardous nature and increased regulation associated with disposal methods. Prior to the recovery of the valuable metals, removal of entrained deposits limit the diffusion of lixiviate resulting in low recovery of metals must be taken into consideration. Therefore, petroleum refinery spent catal...

This work presents a three-dimensional Computational Fluid Dynamics (CFD) in house model to simulate the dispersion of organic substances along a river. The finite volume method is used to aproximate the conservation of momentum and mass equations. A Cartesian coordinate system has been chosen to represent the river. Turbulence is taken into account by a zero-order equation model. The Streeter-...

The implementation of site-wide corrective action using risk-based decision making at large and complex industrial, energy or defense facilities presents a number of challenges. To address these challenges, a spatial environmental risk assessment methodology has been developed by connecting Geographic Information Systems (GIS), relational databases and spreadsheets. The methodology is based on ...

Abstract. The petroleum refineries sector is one of the highest-ranked sectors in terms GHG emissions per facility. As a way forward managing climate change, assessment has become crucial achieving net zero emissions. objective this study to develop appropriate measurements for performance Malaysia refinery sector. framework includes establishing indicators and parameters quantify assess carbon...

To enhance models for refinery processes it seems inevitable to increase the level of compositional detail to a much higher level than today. In previous work, we have developed a simulation technique for steady-state simulation, which pays respect to the particularities of this type of detailed composition models. With this new technique, it seems to be possible to significantly lower the comp...