Energy Management Strategies for Process Site CO2 Emissions Reduction (original) (raw)

Carbon Emission Reduction using Process Integration and Fuel Switching

Carbon dioxide (CO2) emission reduction targeting is an important step in atmospheric CO2 concentration control. Graphical targetting method involves time consuming manual procedures, while the quality of solutions produced is dependent on the designer’s experience and judgment. Graphical approach also does not account for the cost factor during the design phase. This paper introduces a MINLP model for simultaneous CO2 emissions reduction targeting via fuel switching and HEN retrofit for existing plant. A model execution strategy was proposed along with proposed model. Application of proposed model onto case study has shown the capability of the model to generate solution for targeted CO2 emissions reduction at minimum payback period.

Twenty Years of PRES: Past, Present and Future – Process Integration Towards Sustainability

The paper is targeted to provide an overview of the main achievements and ideas presented at PRES conferences. The conference history is now reaching its first 20 y – from 1998 to 2017. The first 11 y were covered by the previous review presented in 2009 and for this reason, the authors focused mainly on the most recent period starting from 2009. The conference has become one of the main vehicles of spreading Process Integration into various research directions and fields of possible implementation. The conference editions covered numerous important contributions towards sustainability. It is not possible to list all of them. However, at least some can be highlighted, but they are not the only contributions. Even this very short selection demonstrates the substantially extended scope of Process Integration, which has been achieved thanks to PRES conferences. Those reviewed include (i) Process Integration with Pinch Analysis, (ii) Process Integration with another approach, (iii) Development of heat exchanger systems for Process Integration, and (iv) other extensions of Process Integration for wider Process System Engineering. The paper shows how the Process Interaction tree has grown and branched out during the last twenty years.

Revamping of Crude Distillation Unit

This paper thoroughly discusses the revamping of an existing crude distillation unit. The main aim is to increase the capacity of the existing unit whilst keeping the energy consumption to a minimum so that the furnace isn’t bottlenecked, also the CO2 emissions and waste water are kept at authorized and environmentally regulated levels to keep this project as green as possible. This was mainly done by optimizing and adjusting the network of heat exchangers to reach a higher level of energy integration using pinch analysis in this revamping process. The work was reinforced by powerful simulation software Aspen HYSYS, Aspen Energy Analyzer and Aspen Exchanger Design and Rating. Energy efficiency has become an important feature in the design of process plants due to the rising cost of energy and the more stringent environmental regulations being implemented worldwide. In many countries most of the chemical plants were built during the era of cheap energy with little emphasis placed on energy efficiency due to the abundance of cheap utility sources such as coal and crude oil. This study applies the Pinch Technology approach to retrofit the heat exchangers network of the Crude Distillation Unit of a complex petroleum refinery with the aim to reduce utilities requirement and the associated gaseous pollutants emission.