Question

How do you propose to control SOx emissions?

Answer 1

Through an extensive study and 18-month trial, a Canadian refinery chose SOx reduction additive technology to reduce its SOx emissions.

As a requirement to approval of an amended air emissions permit for Chevron Canada’s Burnaby refinery, the Greater Vancouver Regional District (GVRD) mandated that Chevron investigate ways to further reduce refinery emissions of sulphur oxides (SOx). The FCCU, which was identified as one of the largest SOx emission sources in the refinery, was targeted for emissions reductions. The Chevron Burnaby refinery project team embarked on a rigorous study to identify and evaluate the various commercially available SOx reduction technology options. 

This study analysed the numerous impacts the SOx reduction technologies would have on the refinery and the surrounding community. It evaluated such factors as performance, environmental and community impacts, economic factors and risk/feasibility. In addition, members of the scientific community were asked to conduct a peer review, which provided a non-biased perspective on the list of technologies and on the ranking process. As a result of this evaluation, Chevron Burnaby selected SOx reduction additive technology to reduce SOx emissions in the refinery. 

To verify the performance projections of the SOx reduction additive technology under long-term operating conditions, and to assess any operational impacts, the refinery embarked on a controlled 18-month trial to maintain SOx emissions at substantially reduced levels. At the end of this trial, the refinery will propose an air permit amendment to the GVRD that will reflect sustainable emissions reductions. This proposed SOx emissions reduction implementation plan is expected to achieve an annual SOx reduction of approximately 600 tonnes per year.