2 replies to this topic

[h.eghbali]

Dear all Hello.

I have a question. Would you please help me?

What is the effect of presence of methanol in ethane feed to olefin plants? 

And what is the maximum permissible methanol in ethane feed?

thanks in advance...

[Pilesar]

Methanol is a contaminate containing oxygen. More CO is formed which can poison the acetylene converter catalyst. Oxygenates tend to increase gum formation, leading to problems downstream. Ethylene yields are affected because of the addition of oxygen radicals to the free radical mix of hydrocarbons in the cracking furnace. There will be enhanced risk of corrosion caused by the additional CO, CO2, methanol, formaldehyde, acids, etc, that are formed by the oxygen. Maximum methanol permissible is 'no more than necessary.' Biologically derived feedstocks containing oxygen compounds are cracked in some plants, so it can be done as long as corrosive compounds are carefully monitored.

[h.eghbali]

Methanol is a contaminate containing oxygen. More CO is formed which can poison the acetylene converter catalyst. Oxygenates tend to increase gum formation, leading to problems downstream. Ethylene yields are affected because of the addition of oxygen radicals to the free radical mix of hydrocarbons in the cracking furnace. There will be enhanced risk of corrosion caused by the additional CO, CO2, methanol, formaldehyde, acids, etc, that are formed by the oxygen. Maximum methanol permissible is 'no more than necessary.' Biologically derived feedstocks containing oxygen compounds are cracked in some plants, so it can be done as long as corrosive compounds are carefully monitored.

Well described answer, thanks dear. I suppose you have an experience on olefin plants. thanks anyway...