Originally Posted By: 1JZ_E46
Originally Posted By: Nyogtha
What do you define as ULSG edyvw?
The US went to 10 ppm sulfur average in motor gasoline in 2017.
https://www.epa.gov/fuels-registration-r...gasoline-sulfur
The provisions for credit generation & trading, small refiners exemption, etc. remain virtually unchanged from Tier 2 regulations - but the average WAS reduced from 30 ppm S to 10 ppm S on January 1, 2017.
At the pump, this means any single batch can vary between 0 ppm S and 84 ppm S, but the nationwide average will be 10 ppm S.
I've seen nothing in the media about changes to this rule, nor legislation nor rule promulgation that US motor gasoline sulfur can only increase now. Can you post some supporting links for your post content?
You're understanding of the U.S. ULSG rules is wrong. It is currently not required for refiners to produce ULSG, and refiners have the ability to purchase "credits" to offset the fact that they aren't producing ULSG. This is a misunderstanding that has spread through BITOG for over a year now.
https://www.epa.gov/gasoline-standards/gasoline-sulfur
https://www.gpo.gov/fdsys/pkg/FR-2014-04-28/pdf/2014-06954.pdf
From the executive summary:
"These early credit provisions, coupled
with the ability to carry over credits
from Tier 2 into Tier 3 (an additional
flexibility being finalized today that was
not part of the proposal), will allow for
early actions to reduce sulfur levels by
some refineries to be used to delay the
need for actions at other refineries until
2020."
I wouldn't count on any changes until at least 2019.
Your understanding of my understanding is wrong.
See where I state any batch will vary between 0 and 84 ppm sulfur, but the nationwide average will be 10 ppm.
This is due to exchange of credits, smalll refiners exemptions, etc. much like the Tier 2 program, just as I posted.
Read the whole post plus all the material on the EPA web dite.
If a site overconttols (manufactures gasoline < 10 ppm S), it generates credits. There will be a lot of large refiners who overcontrol at their larger refineries and use credits they generate at their smaller refineries, during periods of maintenance such as turnarounds, and for sale. The converse is true of refiners who undercontrol. Per batch max spec is 80 ppm at the refinery gate, 84 ppm at terminals to allow for some minor cross-contamination during transit. These max per batch specs cannot be mofified by credits.
I worked in the industry and blended 1.5 million to 2 million gallons of gasoline a day when I was a blendineer. My wife still works in the industry at an executive level for a major refiner.