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Ruan Francois Rossouw

Ruan Francois Rossouw
Sasol Energy Operations · Data Science - Machine Learning and Statistics

PhD

About

9
Publications
1,093
Reads
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39
Citations
Citations since 2017
2 Research Items
18 Citations
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201720182019202020212022202301234567
201720182019202020212022202301234567
201720182019202020212022202301234567

Publications

Publications (9)
Article
Multivariate statistical process monitoring (MSPM) has received book-length treatments and wide spread application in industry. In MSPM, multivariate data analysis techniques such as principal component analysis (PCA) are commonly employed to project the (possibly many) process variables onto a lower dimensional space where they are jointly monitor...
Article
Full-text available
The Sasol Coal Value Chain is a complex system consisting of blending, stacking and reclaiming of no fewer than six different coal sources with vastly different coal qualities. The amount and quality of the gas produced from coal depend crucially on the quality of the coal reclaimed from the coal stacking yards. In this paper the development of a r...
Article
Multivariate process monitoring is important in industry to ensure that production processes perform as close as possible to optimal operation. However, the selection of a reference set of optimal or expected performance is required for efficient process monitoring in real time. In this paper we present the method of Generalized Orthogonal Procrust...
Article
In this paper, different dissimilarity measures are investigated to construct maximin designs for compositional data. Specifically, the effect of different dissimilarity measures on the maximin design criterion for two case studies is presented. Design evaluation criteria are proposed to distinguish between the maximin designs generated. An optimiz...
Article
Full-text available
Sasol, an integrated energy and chemicals company based in South Africa, leads the world in producing liquid fuels from natural gas and coal. Sasol faces many challenges, such as stricter fuel specifications, fluctuating oil and gas prices, and unique developing-world issues. Historically, the petrochemical industry based business decisions on aver...
Article
Full-text available
Overall availability of a chemical process is of critical importance in industry. In this paper we evaluate the process design factors that influence the availability of a new chemical production facility by performing computer experiments on a stochastic simulation model. Experimental designs commonly used in the Design and Analysis of Computer Exp...
Article
Dual response surface optimization of the Sasol-Lurgi fixed bed dry bottom gasification process was carried out by performing response surface modelling and robustness studies on the process variables of interest from a specially equipped full-scale test gasifier. Coal particle size distribution and coal composition are considered as hard-to-contro...
Article
For fuels tested at critical compression ratio, the in-cylinder pressure development exhibits a distinct change in the pressure rise rate, argued to be the onset of knock. The estimation of the position of knock is important for the evaluation of the burn duration of the fuel and its development features leading up to the autoignition of the end-ga...
Article
Thesis (M.Sc. (Computer Science))--North-West University, Vaal Triangle Campus, 2009. Building an industrial simulation model is a very time and cost intensive exercise because these models are large and consist of complicated computer code. Fully understanding the relationships between the inputs and the outputs are not straight forward and theref...

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