Petroleum Coke

I am looking for you experiences about burning petroleum coke.
Has anyone burned it and what do they think of it?
I have tried it and it gives off a fierce heat with no ash left at all.
My coal merchant tells me it is available in several sizes and in ovoid shape.

I've burned pet coke, i like it, unfortunately over here it hasn't in any way cought on a a residential fuel, thus i've only ever found it in little pellets, similar to rice coal, which doesn't work well in my stove. or any that i've burned it in. it would be great for semeone who has a rice coal fueled boiler etc. i think that it could extend their ash removal to proabably once/ month.

Where is pet coke typically available? We have some very large refineries in the Chicago area, maybe that would be a supply? I'd love to try it in the Keystoker if it would burn and not set the hopper on fire. Might be cheaper than buying bagged Blaschak all the way out here.

Edit: I also see that most pet coke is pretty high in sulfur (~4% to 7%). That's a lot compared to anthracite, and even quite a bit more than the high sulfur bituminous I have out here. Of course, it won't smoke like bituminous, and if it would burn in my stoker, I could keep the same equipment. Hmmm.....

High sulfur won't make any difference in your application at all. the exxonmobil refinery outside of joliet (on I 55, just south of I 80) produces a large amount of pet coke, go talk to them, perhaps they would sell you a few tons.