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Dear All, The casting of molten steel into blooms and the rolling process fascinated me as a child but now I am into refining. Can someone enlighten me on the role/job profile of a chemical engineer at a steel plant. Thanks

Dear All, I've a two heat exchgrs A, B in series. Desalted crude is being heated on tube side with gas oil on shell side. Over a 3month time I observed that 1. outlet temp of crude from exchgr B has dropped 2. pressure drop across B is also high both when compared to A. (Directionally, B is...

Can anyone explain the difference between mCpdT and UAdT..

Dear All, Of late two steam drums in boilers of our power plant have shown cracks during RLI. Can the forum throw some light on the possible reasons for cracks in steam drum and how to go about a preliminary investigation. Thanks

Dear All, I am trying to model a steam-naphtha reformer. I hit a block in searching the rate equations for methane reforming and shift reaction. Googl'ng did help in getting equations but some constants were missing. Any help would be appreciated.

Dear All, I've noticed catalytic fixed bed reactors being heated to specified temperature(start up) by either hydrogen or nitrogen. How can I estimate the time and quantity of hydrogen/nitrogen required to heat the bed to a specified temperature? Also ,what factors go into choosing between...

Dear all, What does transalkylation disproportionation of toluene (stream from Benzene-toluene fractionator) result in? What is the reaction? Thanks

I am interested in studying the effect of mixing. My experiment would be like compare * the reaction in a narrow channel and the reaction in a rotating tube.(no catalyst) In both cases, I will maintain the same temperature, pressure, residence time. Am I overlooking any other important...

Hi, I am new process engineer in refining. Can anyone suggest me link for tools/ softwares to generate process flow diagrams .

A plant is designed to produce hydrogen from Light naphtha. Feed is at 13000kg/hr. If I have to run the plant with a different feed ,say butanes will there be any hydraulic limitation. How should I go about investigating this?

Hello For the vessel shown in the attachment, size of the particles is different and the liquid entry is from the bottom. I want to calculate the minimum fluidization velocity from Ergun equation. To estimate the average particle diameter, I doubt the use of sauter mean diameter. Can I use the...

Is there any shortcut method to assess the performance of a hydrocracker(recycle type)?

To what temperature must the combustion air be heated in an airpreheater

I wish to evaluate the performance of a compressor(reciprocating & centrifugal). Can I compare the adiabatic head / polytropic head with design values. If I have enough cushion on this, can I say that the compressor can handle more volume of gases? Should I look at any other parameters?

I am looking for a sulfur analyser, to be installed in a gasoline line. The analyser should work in 350ppm-10,000ppm and a response time of few seconds. I've seen quite a few websites but I dont get the capital cost of such analysers. I need this info for a cost analysis. Can the forum help me...

Is there any relation between auto ignition temperature and C-H ratio? Many thanks

We send about 5-6grades of diesel(with varying Sulfur and flash point) through a single line, 15km long, from the refinery to the jetty. With wide variation in grades , the product goes offspec and we had to push some quantity to crude line at the jetty. Can anyone in the forum share their...

What is "pinning" in CCR Thanks

In a sulfur recovery unit(from -amine acid gas and sour water stripper acid gas), the exit gas from BSR at 344degC goes to a quench column where it is cooled to 40degC. There's caustic circulation in this column as well. The quenched gas is again reheated to 190degC before sending to 190degC...

I read something like this "....unsuccessful in steam air decoking of visbreaker furnace. An iron oxide layer had formed on top of coke and shielded it. Reduction step with hydrogen is now often used prior to final steam air decoking." Can anyone explain- 1. how iron oxide forms above the coke...