These files are associated with my Doctoral Dissertation entitled: "Optimal Design and Evaluation of a Biogas-based Oxidative Coupling of Methane" Appendix B - Aspen Plus process model files - This folder contains the simulations models developed in software Aspen Plus and Aspen Custom Modeler. The files are in the proprietary format from AspenTech (software developer) and a require a valid Aspen Plus license to be used. Appendix C - Optimization Framework - This folder contains the source code for the developed Python Black-Box Optimization toolbox (bbop.py). - Some examples (Examples_bbop.py) are also provided. This require the Aspen Plus process models (in AspenTech proprietary format) contained in sub-folder AspenPlusFiles. The use of this files requires a valid Aspen Plus software license.