Thank you all for the responses. I need to digest this and decide what I need to do. I am an air quality engineer and I am trying to identify a justifiable means of estimating emissions of EtOH from this process. I believe there will be very little entrained, non-condensible gasses in the...
Hello. I do have a ChemE background but it has been 20+ years since I have been exposed to process engineering. I have a question. If we have a tank of ethanol (approximately 70F indoors) and we pull vacuum on it using a liquid ring pump (water as the liquid), would any significant amount of...
Hi, I am trying to find out if there is such a thing as a published vapor pressure for polyethylene glycol 400 at a elevated temperature. SDS's I have found show the vapor pressure is < 0.01 mm Hg psi at 20C. My application is using PEG400 at about 300 F. The problem is that a state regulator...
This is probably way too late of a response, but to convert SCFD to lb/day, you would use the Ideal Gas Law. First we would need to know what the "standard" temperature and pressure are. Probably either 0, 20, or 25 Celsius and 1 atmosphere. Then plug values into ideal gas law (P*V=n*R*T) to...
Ah yes, partial pressures coming back to me now. Thanks for the step in the right direction. This should get me in the right ballpark as all I need is a best guess. I will calculate total moles of gas at condensing temp and 1 atm, then use the ratio of methanol vapor pressure/1 atm to...
Well, I may have a ChemE degree, but I can't for the life of me remember most of the gas phase equillibrium details that I probably once was tested on. I am working with a process that will consist essentially of a stream of air saturated with methanol and water vapor that will be routed to a...
Most airports are required by the FAA to have emergency generators operating during periods of low visibility in the event that utility power would be lost so that runway lighting will not go down. The new engine rules (NESHAP ZZZZ) specify that "emergency" generators can comply with the rules...
Hi Peter:
There are probably several online and in-person training sessions available for AERSCREEN. I searched the internet for "AERSCREEN training" and there are several available although I can't personally reccomend any of them because I have not taken them. An introductory course on the...
Hi Anouri. I work with permitting landfill gas (LFG) to energy facilities frequently. I know exactly what your concern is. There are several methods of removing H2S and siloxanes from landfill gas. The method chosen usually depends on how bad the gas is and how far down you need to go...
I find that there are a lot of "environmental" forums on the internet, but they mostly relate to Civil topics and not enough towards Air Pollution/Control/Air Permitting.
Air Permitting is a difficult topic to keep on top of with the speed with which US EPA changes rules. I hope that this...
Hi:
I know I probably will not provide enough informaiton to get what I need, but here goes...I need to estimate how much rust is sandblasted off of a large piece of steel which I beleive to be some type of mild carbon steel with a coating of surface rust. Are there any methods out there on...
I am working with some EPCRA reporting and have some questions. For one, if a powerplant uses coal as fuel (and stores more than 10,000# onsite) is that reportable under EPCRA (sec 311)? I found an MSDS that states it is not hazardous for EPCRA, but other sources I run across say it is...
Would anyone have a recomendation for the type or perhaps even a brand of flowmeter to install in a particular applicaiton? The pipe is 20" and 30" steel pipe pumping water at a rate of 2000-5000 GPM. The site happens to be fairly remote. Power is available, but no buildings. I am a little...
I am writing a permit for a company and they have wood chip storage piles sitting outside. The wood is fairly wet, 40% moisture or so. Does anyone know of a good source of information to determine the fugitive particulate emissions from wind erosion acting on the piles? The only part of AP-42...
What happens to the head that a pump experiences when there are two or more outlets at different elevations?
My situation is this...I have several high volume pumps (Pumps A) pumping water through steel pipe (20" and 30"). I know all the lengths of pipe and even some rough estimates of...
