ORACLE: Odorant RemovAl by Chemical Looping dEsulphurisation

Lead Research Organisation: University of Cambridge
Department Name: Engineering

Abstract

Work in this grant will look at the uses of oxygen carriers in processes to assist in the removal of odorant compounds from natural gas. The odorants are added so that leaks of gas can be detected by the smell, however, they pose problems for any use the natural gas which is not tolerant of sulphur. in particular fuel cells use catalysts which are deactivated by sulphur. It is therefore necessary to remove the odorants before the natural gas can be used in these systems. An oxygen carrier uses oxygen held within the solid material to burn a substance, and can then be regenerated itself with air. We will
look at the selectivity and efficiency of various oxygen carrier materials towards the combustion of sulphur containing compounds. This process, if found to be suitable can then be used in a system which first combusts the sulphur compounds to sulphur dioxide so that it can be removed by standard methods.

Planned Impact

This project will work closely with the lead SME (GR2L) and Johnson Matthey (JM), one of the world's leading catalyst manufacturers. Chemical looping combustion was originally proposed as a way of increasing the efficiency of powerstations, reducing NOx and performing carbon capture. However, any large scale industrial use in the power sector is many years from application, largely owing to the massive capital outlay and the risk involved with this technology. Early adoption of chemical looping technology is therefore likely to be at a much smaller scale and in niche areas. One such application is gas clean up and recovery. GR2L already exploit this technology in their Argon0 system. A key way to achieve impact is therefore to find alternative applications for chemical looping technology and to work with industrial partners who have an unmet need. Working closely with GR2L and JM in this project means that the results will have immediate impact, and be directly applicable to industrial applications.

The particular application of the chemical looping technology in this work, is to assist in the removal of contaminates from methane. At present many processes which can be used to convert natural gas are inhibited by the sulphur compounds used to add odour. Thus, a cost effective and more generic way of removing these compounds safely will enable natural gas to be used more efficiently in point of use processes (e.g. small fuel cells, whose catalysts are poisoned by sulphur). This will have wider benefits to society at large, since the proposed methods of removing the sulphur are environmentally
benign and safe, and their implementation will remove one of the barriers to wider adoption of e.g. efficient, small scale fuel cell system for combined heat and power.

Publications

10 25 50
 
Description ORACLE has demonstrated the feasibility of CLCD to remove sulphur odorants from biogas; it is hoped this can be extended to fuel cell applications using natural gas. Design feasibility of a prototype has been completed. Next steps are to seek funding to construct the prototype unit and install it at customer sites in the fuel cell and biogas processing markets.

The findings of this project have already been document in the final report to the TSB. Owing to possible intellectual property conflicts we are unable to publicise the findings until the work has either been published or patented, which we hope to do in due course.
Exploitation Route We are currently moving to protect some of the IP developed in this project and will be putting together a follow on project to exploit these results, in collaboration with GR2L. The next phase will involve testing at customer sites if project funding is forthcoming.
Sectors Chemicals,Energy,Environment

 
Description We are currently putting together a proposal for a project to exploit the results.
First Year Of Impact 2016
Sector Chemicals,Energy
Impact Types Economic

 
Description Presentation on findings at Rushlight conference 
Form Of Engagement Activity A talk or presentation
Part Of Official Scheme? No
Geographic Reach National
Primary Audience Industry/Business
Results and Impact Presentation of finding at the Rushlight conference and participation in meeting.
Year(s) Of Engagement Activity 2017