<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>Sheida Sheikheh — Writing</title><description>PhD candidate studying how the subsurface can safely store hydrogen — from trona and salt caverns to the geomechanics that keep them stable.</description><link>https://sheidasheikheh.com/</link><item><title>Trona: Wyoming&apos;s Buried Treasure</title><link>https://sheidasheikheh.com/blog/trona-wyomings-treasure/</link><guid isPermaLink="true">https://sheidasheikheh.com/blog/trona-wyomings-treasure/</guid><description>Beneath southwest Wyoming lies the largest trona deposit on Earth. What is this mineral, how did an ancient lake create it, and why does it matter for both soda ash and hydrogen?</description><pubDate>Mon, 18 May 2026 00:00:00 GMT</pubDate><category>Trona</category><category>Wyoming</category><category>Minerals</category></item><item><title>The Colors of Hydrogen</title><link>https://sheidasheikheh.com/blog/colors-of-hydrogen/</link><guid isPermaLink="true">https://sheidasheikheh.com/blog/colors-of-hydrogen/</guid><description>Hydrogen is colorless — but you will hear it called green, blue, grey, and more. The colors are a shorthand for how it is made, and they decide whether it actually helps the climate.</description><pubDate>Tue, 12 May 2026 00:00:00 GMT</pubDate><category>Hydrogen</category><category>Energy transition</category></item><item><title>Will It Hold? The Geomechanics of Keeping a Cavern Stable</title><link>https://sheidasheikheh.com/blog/reservoir-geomechanics-cavern-stability/</link><guid isPermaLink="true">https://sheidasheikheh.com/blog/reservoir-geomechanics-cavern-stability/</guid><description>An underground cavern is a hole in rock that is squeezed, flows, and slowly closes. A visual look at the stress, creep, pressure limits, and subsidence that decide whether storage stays safe.</description><pubDate>Wed, 06 May 2026 00:00:00 GMT</pubDate><category>Reservoir geomechanics</category><category>Cavern stability</category><category>Hydrogen storage</category></item><item><title>Anatomy of a Storage Cavern</title><link>https://sheidasheikheh.com/blog/anatomy-of-a-cavern/</link><guid isPermaLink="true">https://sheidasheikheh.com/blog/anatomy-of-a-cavern/</guid><description>What is actually down there? A guided tour of an operating hydrogen cavern — wellhead to sump — and the cushion gas, working gas, and pressure window that keep it running.</description><pubDate>Tue, 28 Apr 2026 00:00:00 GMT</pubDate><category>Caverns</category><category>Hydrogen storage</category></item><item><title>Solution Mining: Carving a Cavern from Rock</title><link>https://sheidasheikheh.com/blog/solution-mining/</link><guid isPermaLink="true">https://sheidasheikheh.com/blog/solution-mining/</guid><description>You cannot dig a cavern a kilometre underground — you dissolve one. A visual look at how water, circulation, and a clever floating blanket sculpt a storage cavern out of solid salt or trona.</description><pubDate>Sat, 18 Apr 2026 00:00:00 GMT</pubDate><category>Solution mining</category><category>Caverns</category><category>Salt</category></item><item><title>Putting Hydrogen Underground: Where, How Much, and How to Choose</title><link>https://sheidasheikheh.com/blog/underground-hydrogen-storage/</link><guid isPermaLink="true">https://sheidasheikheh.com/blog/underground-hydrogen-storage/</guid><description>Grid-scale hydrogen has to live underground. A visual guide to the storage options, the seasonal logic, the pressure physics, and how engineers pick a site.</description><pubDate>Tue, 24 Mar 2026 00:00:00 GMT</pubDate><category>Hydrogen storage</category><category>Underground storage</category><category>Wyoming</category></item><item><title>Trona or Salt? Choosing the Rock That Holds Our Hydrogen</title><link>https://sheidasheikheh.com/blog/trona-vs-salt-caverns/</link><guid isPermaLink="true">https://sheidasheikheh.com/blog/trona-vs-salt-caverns/</guid><description>Salt caverns are the proven home for underground hydrogen — but Wyoming sits on something different. A visual tour of how trona stacks up against salt as host rock.</description><pubDate>Tue, 10 Feb 2026 00:00:00 GMT</pubDate><category>Hydrogen storage</category><category>Trona</category><category>Caverns</category></item></channel></rss>