Q & A

Welcome to the ePTQ's Q&A: the technology Q&A for the refining, gas, biofuels and petrochemical processing industries.
You can browse existing questions and answers by topic or date or carry out a freetext search.
Using it is simple: try it out for yourself now.
And if you want to ask a question on any aspect of hydrocarbon process technology or plant, or answer a question that has been posed, just register and login. It will take you only seconds to do so.

We are excited to be Strategic Partner of the World Refining Association’s ERTC: Ask the Experts. This new event from the organisers of ERTC, the biggest and most important event for the European downstream industry, is the only event in Europe offering process and maintenance engineers a platform to ask their burning questions about the everyday challenges facing their plant and hear the practical solutions from industry experts.

This face to face interactive event, features experts from leading European refineries and technology providers; engineers will have the chance to hear unparalleled knowledge through interactive discussions such as fishbowl panels, Q&A Panels and Poster Sessions. Learn more here: asktheexperts.wraconferences.com  


Browse the Q & A
Search by Text Search By Date


Enter Search Criteria
 

Search by Date 

 
Search by Topics  

Recent Questions
Date  Replies
14/08/2017 Q: What is the uses of Decant Oil or clarified oil or slurry oil which is generated from the Catalytic Converter? What are the valuable chemicals recoverable for it? What is the different technology behind this to convert it to a useful fractions? Which company provides the technology? (5)
12/08/2017 Q: Decoking of the fired heater of VDU
During recent years , the skin temperature of one of the 4 coils developed a slightly higher skin temperature than the other 3 coils , the skin temperature is nearly 500 C , it is still in the safe range but we are now considering decoking to to remove any present coke during shutdown . Anyways , I am comparing SAD ( Steam Air Decoking ) to Pigging , There seem to be many hazards and incidents during SAD , i wonder if any of you witnessed any incidents with SAD ? ... Can anyone clarify the potential hazards and their severity ? do you recommend it or you recommend pigging ? ...... Thanks for your comments and replies in advance ....
(1)
07/08/2017 Q: 42 Inch Vac transfer line developed leak at 6 clock position at the 20 inch branch connecting location which was connected at 12 clock position of the pipeline. Total 2 no of branch in which one no of branch location leak observed in 42 in header due to internal erosion. In other branch location at 42 inch header the thickness was found to be 4mm over a length of 500mm at 6 clock position straight bottom to the 20 inch branch. The line is of P5 metallurgy with SS 316 clad. original thickness 12.7mm. The line was in service for 19 years. Remaining locations thickness was found to be above MAT. Only in 2 branch locations at localized location severe erosion observed.
In this instance, the leak was found to be due to turbulence and velocity which caused erosion but are there any other factors which cause this kind of failure?

(2)
04/08/2017 Q: What is the process for detecting leak in feed/effluent heat exchanger of C5/C6 isonerization process which uses zeolite catalyst, without shutdown or using radio active tracers? Is there any component which when injected along with feed will completely react in isomerization reactor?
(3)
31/07/2017 Q: What is meant by "False Air Damper" in reformer?
How does it work?
 
Recently Answered Questions
Date  Replies
14/05/2017 Q: We are using AXENS Catalyst RG-682 (Naphtha Reforming) and HR-538 (Naphtha Hydrotreating).
Now, my question is what is the actual life time of these two Catalyst? How many times it can possible to regenerate RG-682 & HR-538?
(6)
14/08/2017 Q: What is the uses of Decant Oil or clarified oil or slurry oil which is generated from the Catalytic Converter? What are the valuable chemicals recoverable for it? What is the different technology behind this to convert it to a useful fractions? Which company provides the technology? (5)
12/08/2017 Q: Decoking of the fired heater of VDU
During recent years , the skin temperature of one of the 4 coils developed a slightly higher skin temperature than the other 3 coils , the skin temperature is nearly 500 C , it is still in the safe range but we are now considering decoking to to remove any present coke during shutdown . Anyways , I am comparing SAD ( Steam Air Decoking ) to Pigging , There seem to be many hazards and incidents during SAD , i wonder if any of you witnessed any incidents with SAD ? ... Can anyone clarify the potential hazards and their severity ? do you recommend it or you recommend pigging ? ...... Thanks for your comments and replies in advance ....
(1)
17/07/2017 Q: What is the effect of reducing the system pressure in a gas oil/naphtha hydrotreater? Will this be able to reduce the hydrogen consumption given that there is still allowance on catalyst deactivation? What parameters do we need to consider before reducing the system pressure? (2)
24/07/2017 Q: We recently received a batch of jet fuel, which test within the refinery indicated was within specification (40 ° Celsius). However,when sent through a pipeline of 45 kilometres to the company's warehouse, and after being allowed an appropriate period of stability, we took homogeneous samples of the tank and found the flash point was was 37.8 Celsius. How has this change occurred? (5)
Post