Environmental impact assessment is becoming indispensable for the design and operation of chemical plants. Structured and consistent methods for this purpose have experienced a rapid development. The more rigorous and sophisticated these methods become, the greater is the demand for convenient tools. On the other hand, despite the incredible advances in process simulators, some aspects have sti...

The purpose of this study is to develop a model-based methodology for integration of process design and control (IPDC) problem. The new methodology is organized in four hierarchical stages based on a decomposition of the general optimization problem. The objective of each stage is to define the search space and enumerate a set of promising candidates. In each subsequent stage, the search space ...

We propose a computer-aided methodology to automatically generate time optimal production schemes for chemical batch plants operating in multi-batch mode. Our approach is based on the following principles: (1) the plant is modeled at the level of process operations whose behavior is specified by timed automata, (2) the optimal production schemes are generated using algorithms for reachability a...

A series of the mixed oxides iron and cerium, with an iron(III) oxide content ranging from 0 wt% to 100 were tested as oxygen carriers in chemical looping dry reforming methane (CL-DRM). The reactivity during CL-DRM significantly increased when cerium are forming a oxide. By careful control Fe2O3/CeO2 mass ratio, initial oxidation state reaction time activity carrier material can be adjusted so...

Background: Yazd waste stabilization pond facilities consist of three stabilization pond systems, module 1, module 2 and module 3 that AWSP module 1 has started its operation. The existing facilities have had several problems in their operation. The objectives of this research were to evaluate the performance of stabilization ponds in wastewater treatment of the city of Yazd, due to several pro...

Fine chemical and pharmaceutical manufacturers focus on new product development as a means of growth, with time to market as a key driver. Time to market improvements are, however, limited by a company’s infrastructure; for example, in-house design and manufacturing capacity, ability to respond to a dynamic environment etc. In many marketplaces, there is an increasing trend towards outsourcing ...

Deployment of solar fuels technology requires photoanodes with long term stability, which can be accomplished using light absorbers that self-passivate under operational conditions. Several copper vanadates have been recently reported as promising photoanode materials, and their stability and self-passivation is demonstrated through a combination of Pourbaix calculations and combinatorial exper...