We’re encountering fines build-up in the drum overhead into the fractionator of our delayed coker. Solutions please.

We want to reduce the refinery’s carbon footprint, starting with SMR. What’s the best economic approach: CCUS, an alternative process, or buy in the hydrogen?

What’s the range of drop-in fuels we could potentially produce from biofeedstocks (lipids) with an appropriate process line-up?

Are catalyst additives available to boost bottoms processing in the FCC?

Can you suggest ways to avoid or deal with asphaltene precipitation in our desalter?

Is there some way of reversing silicon poisoning in our hydrotreating catalyst?

Please share testing procedure for measuring total suspended solids (TSS) in ARU circulating Amine (MDEA based amine).

We are planning to upgrade the NHT feed LL coalescer from PP wools to cartridges. How do we check the free water at the naphtha outlet coalescer to ensure the performance meets the spec? Is there any standard method to check free water in naphtha?

In ARDS Process 3 reactors in series first one single catalyst bed, and the other two having 2 catalyst bed for each. Why the first reactor out let line size (3 in) is smaller than the size of the outlet lines for other reactors (4 in).

How we can maximize the products in two stages hydrocracker?

What is crude indifference analysis? How does it help selecting the best option from crude assay for processing?

We have Semi catalytic reformer, as you know for heating reactors we have three different size of heaters , we have a main problem in our heaters in (convection and stack) temperature during the day of operation we get  kick on the heater (that is mean increase or decrease the temperatures very fast)  more thane one time  but still now we can't fix this problem 100%, my question is we don't know the basic problems that occur on the heater until now. Do you have any recommendations or anyone know about our problem, for instant we did these activities. 1: Cleaning all burners and 2: Check out the dumper.

In a coker with more than one module, for example two, when they have to lower the power supply, do they take one module out of service or do they lower the load on both modules? What would this decision depend on?

I am looking for way to blend heavy crude oil with light crude for easy treatment. How can I manage to write the equation to determine the quantity of the different crude. And how can design the blending system (in line or tank blender)

We are experiencing severe foaming problem in HP amine absorber in OHCU. Please specify reason and remedy.

What are the minimum requirements or the prerequisites for implementation of the Advanced Process Control system in downstream complex refinery, consisting of units such as Hydrocracking unit, Vacuum Distillation Unit and Reforming Unit?

How to calculate velocity inside tube of an exchanger and what is the permissible velocity? What is the permissible velocity inside a normal pipeline which is for handling gases or liquid or mixture?

Can a rich amine (MDEA) with 0.35 moles of H2S / mole of MDEA (40 wt %) carrying pipeline in offsite be operated at temperatures at or above 60 degc? It is usually observed that in offsite piping the rich amine is carried at around 40 degc. Kindly advise if there would be some adverse effect of higher temperature of rich amine at or above 60 degC carried through over 1 kilometer long pipe in offsite piping of carbon steel with NACE MR0103 compliant pipe class. Please advise me if there is any literature to support the decision.

In our NHT licensed by Topsoe. We have once through process. We don't have any recycle gas compressor. We directly take hydrogen from 40 bar header to maintain a system pressure 24.5 bar. Does it have any significance?

In our refinery, the COD (chemical oxygen demand) of treated wastewater is analyzed in both laboratory and field analyzers. Lately, the COD in the analyzer has been increased by 4 times compared to the COD in the laboratory. We use the same method-Acidic Permanganate for both, but the additional AgNO3 is used for only the laboratory. However, the chloride content in treated wastewater hasn't been increased. What is the reason for the difference between the field analyzer and laboratory?

HVGO cut in Vacuum distillation unit color increased from brownish to dark green during processing of Urals crude. No exchangers found leaking in preheat train. Draw off temperature and VDU heater COT also reduced to improve the color but no much improvement seen. Why does this happen?

Can an ultra heavy crude oil of 12 deg API be converted to 22 Deg API by mixing Diesel?

Any guide for Natural draft heater ducy sizing and stack effect calculation?

A water sample from KO drum (downstream to HP absorber at sweating unit) is black in colour, rotten smelling, pH = 10, Fe = 4 mg/l... MDEA used for sweating, CO₂ at feed gas about 3.5%, H₂S nil. What is the reason for the black colour and rise in pH?

Pitting corrosion found at bottom/shell side charcoal filter at (lean amine filtration system) Lean amine = MDEA 30% demi water used for preparation and makeup (Diss O₂ present) feed gas CO₂ 4%, H₂S 0.0 HSAS 0.18%, cl 300 ppm at lean amine sample. What do you think are the factors responsible for corrosion?