October 2007

Special Report: Process Control and Information Systems

Model-free adaptive control technology enables ethylene quench water pH control

PetroChina has improved ethylene production efficiency and plant safety

Cheng, G., CyboSoft; Gao, F., Wang, L.-Z., PetroChina

In an ethylene plant, hydrocarbon feedstock is cracked at a high temperature to produce ethylene and pyrolysis gasoline (py-gas) as a byproduct. The py-gas consists of a mixture of light hydrocarbons and is processed further through a quench water process, downstream compressors and distilled processes. In the quench water tower, gases are cooled by direct contact with the quench water. At the bottom of the tower, the condensed gas is separated from the water and pumped away. By direct contact with the gases, the quench water becomes contaminated. Py-gas in the quench water is a problem area for most ethylene producers since it can cause emulsion making the separation more difficult, in ad

Log in to view this article.

Not Yet A Subscriber? Here are Your Options.

1) Start a FREE TRIAL SUBSCRIPTION and gain access to all articles in the current issue of Hydrocarbon Processing magazine.

2) SUBSCRIBE to Hydrocarbon Processing magazine in print or digital format and gain ACCESS to the current issue as well as to 3 articles from the HP archives per month. $409 for an annual subscription*.

3) Start a FULL ACCESS PLAN SUBSCRIPTION and regain ACCESS to this article, the current issue, all past issues in the HP Archive, the HP Process Handbooks, HP Market Data, and more. $1,995 for an annual subscription.  For information about group rates or multi-year terms, contact J'Nette Davis-Nichols at Jnette.Davis-Nichols@GulfEnergyInfo.com or +1 713.520.4426*.

*Access will be granted the next business day.

Related Articles

From the Archive



{{ error }}
{{ comment.comment.Name }} • {{ comment.timeAgo }}
{{ comment.comment.Text }}