Flowsheeting and optimisation of the BrOx cycle for CO2-free energy production from natural gas
| Autor: | Jesús González Rebordinos, Jan Kampwerth, David W. Agar |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Exothermic reaction
02 engineering and technology 010402 general chemistry 01 natural sciences Industrial and Manufacturing Engineering Methane Catalysis law.invention chemistry.chemical_compound law Natural gas Process integration Electrical and Electronic Engineering Process engineering Distillation Civil and Structural Engineering Waste management business.industry Chemistry Mechanical Engineering Building and Construction 021001 nanoscience & nanotechnology Pollution 0104 chemical sciences General Energy Electricity generation Yield (chemistry) 0210 nano-technology business |
| Zdroj: | Energy. 133:327-337 |
| ISSN: | 0360-5442 |
| DOI: | 10.1016/j.energy.2017.05.085 |
| Popis: | The BrOx (Bromination-Oxidation) cycle is a novel process that enables energy generation from natural gas without concomitant CO2 emissions. The cycle's main units are two exothermic reactions and two separation steps that result in an overall process in which methane and oxygen yield water, solid carbon and energy. The flowsheeting of the process has been conducted and optimised with Aspen Plus®. The simulation of the reaction section shows that complete conversion of methane can be achieved during methane bromination while ensuring that brominated by-products are only present as traces. Additionally, a reaction configuration consisting of a thermal step (800 °- C 950 °C) and a catalytic one (350 °C) has proved to be optimal for conducting hydrogen bromide oxidation. A separation train consisting of one decanter, two distillation columns and a flash has been selected as the best option for the separation of the bromine-water stream. The use of chlorine has been in the cycle (ClOx) has been compared to the BrOx cycle resulting in lower energy efficiency and more equipment requirements thus demonstrating that bromine is the most suitable halogen for the process. After applying heat integration the efficiency of the process is 73.30%, showing the feasibility of the BrOx cycle. |
| Databáze: | OpenAIRE |
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