Hello, Eng-Tips
Can anyone suggest website or write down a consequent formulas on exact way how FeS is formed in CDU overhead coolers?
When looking at Pourbaix diagram of Iron, several corrosion/solution/stabile Fe areas can be noticed. Please describe this phenomenon which causes serious...
Hello,
In several articles I have been reading, the subject was the difference between total acid number (TAN), determined by ASTM standard method, and naphthenic acid number (NAN), determined by mysterious (to me) "naphthenic acid titration test - NAT". What kind of test is it? Can it be found...
Hello, Eng-Tips
Does anyone know origin of organic chlorides in crude oil? What is the average organic/anorganic chlorides ratio in crude (REB, for example), and is there any relation between crude origin and organic chlorides content? Which chemical compounds/species of chlorine are mostly...
Hello, Eng-Tips
What are the most important parameters when designing CDU overhead waterwash system?
I'm interested in every detail - wash water quality, injection point, water dosing control scheme, water distribution arrangement (nozzles) etc.
We use NH3 for overhead acid neutralisation and...
Hello to members and visitors, I have one rather general question to ask, but I'm interested in every detail I can find out.
The question is about pour point values of vacuum distillation unit products: LVGO, HVGO, TGO (or stripped part of vacuum resid) and vacuum residue itself, from different...
What is the best way to control low-pressure steam (3.5 barG) flow to the air preheaters or steam reboilers channel head? Is it correct to install FRC on the steam inlet side or condensate outlet side?
If control valve is on the steam inlet side, the pressure of steam condensation may be...
Hello,
Does anybody use pilot operated PSV in hydrocracking service? Is there any drawbacks, like sensing line plugging?
We need to make decision between ordinary PSV and pilot-operated PSV in hydrocracker plant. I would appreciate any useful comment and experienced guidelines.
Thank you,
MaNaTMoS
Good day to everyone, I have one interested e-location to recommend:
http://www.mcnallyinstitute.com/home-html/Technical_paper_index.html
A massive amount of very practical and instructive information about
lots of topics around pumps and hydraulics.
Happy 12-15. of july, "The Days of...
Hello,
does anybody has experience with blending ethanol in gasoline up to 10% or more? I would like to know something about way of blending, keeping system clean and dry, additives used, allowed percent of water in ethanol, problems at low temperatures, ...
Thanks in advance.
Where can I find volumetric expansion coefficients of Jet Fuel (170-250C ASTM D86 distillation, density = 0.80g/cm3) and Diesel Oil (210-355C distillation, density = 0.84 g/cm3)?
The question also goes for (average) specific heat (kJ/kg*C) values of these products.
I have found one value for...
Is there any difference between "standard" and "normal" conditions (pressure, temperature). Literature is quite confusing when dealing with this subject, because the temperature is sometimes neglected.
What is the [Nm3/h] of airflow, regarding previously mentioned standard and normal conditions?
Since our naphtha stabilizer's condenser is lacking of condensing capacity at higher reflux rates (in order to ensure proper fractionation efficiency), what should be the best way to correct this unpleasant situation? Working on higher pressures allows us to achieve higher condenser duties, but...
Where can I find detailed tables for heat transfer coefficients in ADU and VDU heat exchangers services? This data should include values from all streams (products), along with steam/water side coefficients in steam reboilers and water cooled exchangers. Condensing and vaporizing hydrocarbon...
What is the typical content of insoluble C7 asphaltenes in HVGO?
What is the average metal (Ni, V, Na) content, chlorides content and non-carbon insolubles content in HVGO stream?
I would appreciate any useful information and experiences concerning these parameters.
What are the causes of loosing vacuum when increasing the top reflux rate in the vacuum bottoms stripper? Does it necessarily mean a liquid phase entrainment to the ejector system?
Where can I find some Test Methods for determination of EVA, SBS and polyethylene polymers in binders like bitumen, using an FTIR spectrometer?
Regards,
MaNaTMoS
Are there any possibilites to drain the condensate to the barometric drum and restore the vacuum in "dry" distillation column? (no precondenser, 3-stage ejector system, delta T for 1st condenser's gas/condensate outlet is +14C. Motive steam pressure is OK, temperature is 30C above design)...
