Add `refinery gas` and `petroleum coke` #1332

[l-emele]

Summary of the discussion

Add refinery gas and petroleum coke

Type of change (CHANGELOG.md)

Added

• refinery gas: Refinery gas is a gas mixture that is produced as a by product of a mineral oil refining process. It mainly consists of hydrogen, methane, ethane and olefins and can be used as a fuel.
• petroleum coke: Petroleum coke is a portion of matter with a solid state of matter that is produced in a mineral oil refining process. It consists mainly of carbon and can be uses as a fuel.

Workflow checklist

Automation

Closes #1332

PR-Assignee

• [ ] 🐙 Follow the Pull Request Workflow
• [ ] 📝 Update the CHANGELOG.md
• [ ] 📙 Add #'s to term tracker item

Reviewer

• [ ] 🐙 Follow the Reviewer Guide
• [ ] 🐙 Provided feedback and show sufficient appreciation for the work done