2024 42 USC 15975 – Petroleum coke gasification

2023 42 USC 15975 – Petroleum coke gasification

2022 42 USC 15975 – Petroleum coke gasification

2021 42 USC 15975 – Petroleum coke gasification

2020 42 USC 15975 – Petroleum coke gasification

2018 42 USC 15975 – Petroleum coke gasification

2017 42 USC 15975 – Petroleum coke gasification

2015 42 USC 15975 – Petroleum coke gasification

2014 42 USC 15975 – Petroleum coke gasification

2013 42 USC 15975 – Petroleum coke gasification

2012 42 USC 15975 – Petroleum coke gasification

2010 42 USC 15975 – Petroleum coke gasification