Hello!! I working in the Venezuela’s coking industrie (PDVSA) I have some materials about of risk of coque and properties, but I don’t know how giving to you such material. My e-mail is email@example.com. There, you can send me an e-mail and I answer you.
Sorry but my english is very poor. If you have some e-mail direction, I will send you the material as soon as possible.
I hope be of help.