[Brad]

Hi Lorenzo;

For several years I sold three of the four upgrading technologies (PSA, membranes, water wash & amine wash), and during that time I did over 600 technology comparisons for RNG developers. I can attest that the criteria for selecting one technology over another needs to be based on which criteria has the biggest impact on life cycle project profitability. In a nutshell that means comparing all four on the basis of:

1) Performance (Risk of Shut in),

2) Reliability (Risk of Downtime),

3) OpEx,

4) Methane Recovery, and

5) CapEx

… in that order. I can also attest to the fact that while every project is different, and every technology has it’s niche where it’s the best fit, in my experience, the vast majority of the time PSA will provide the highest life cycle project profitability.

I disagree with simply reaching out to vendors to ask their opinion, as not surprisingly, each vendor suggests that the best technology is the one they sell. You need a neutral third party to do the comparison.

And while your EPC should be your best option for an unbiased technology comparison, they will often have strong preferences based on what they have the most experience with – i.e it’s easier for them to repeat what they did on a previous project that to risk learning a new technology & process. This will often cloud their judgement, keeping you from getting an truly unbiased opinion that is tailored to the specifics of your project.