About: Dr. Mahmood Moshfeghian

DR. MAHMOOD MOSHFEGHIAN is a Senior Technical Advisor and Senior Instructor. He is the author of most Tips of the Month and develops technical software for PetroSkills. He has 40 years teaching experience in universities as well as for oil and gas industries. Dr. Moshfeghian joined JMC in 1990 as a part time consultant and then as full time instructor/consultant in 2005. Moshfeghian was Professor of Chemical Engineering at Shiraz University. Dr. Moshfeghian is a senior member of AIChE and has published more than 125 technical papers on thermodynamic properties and Process Engineering. Dr. Moshfeghian has presented invited papers in international conferences. He is a member of the Editorial Board for the International Journal of Oil, Gas, and Coal Technology and a member of the GPSA Technical Committee Group F. He holds B.S. (74), M.S. (75) and and PhD (78) degrees in Chemical Engineering, all from Oklahoma State University.

Recent Posts by Dr. Mahmood Moshfeghian

What is the Impact of Light Hydrocarbons on the Natural Gas Hydrate Formation Conditions?

The December 2012 [1] and January 2016 [2] Tips of the Month (TOTM) discussed the hydrate phase behavior of natural gas mixtures containing high content hydrogen sulfide, carbon dioxide, or nitrogen. Specifically, it showed nitrogen and carbon dioxide inhibit the hydrate formation slightly while hydrogen sulfide enhances hydrate formation considerably. This tip will extend theContinue Reading

Written on March 1, 2016 at 12:56 pm
Categories: Gas Processing, Process Facilities, Uncategorized

Correlations for Conversion between True and Reid Vapor Pressures (TVP and RVP)

Accurate measurement and prediction of crude oil and natural gas liquid (NGL) products vapor pressure are important for safe storage and transportation, custody transfer, minimizing vaporization losses and environmental protection. Vapor pressure specifications are typically stated in Reid Vapor Pressure (RVP) or/and True Vapor Pressure (TVP). In addition to the standard procedures for their measurements,Continue Reading

Written on February 1, 2016 at 4:02 pm
Categories: Gas Processing, Process Facilities, Refining

What is the impact of Nitrogen on the Natural Gas Hydrate Formation Conditions?

The December 2012 Tip of the Month (TOTM) [1] discussed the hydrate phase behavior of sour natural gas mixtures. Specifically, it showed carbon dioxide inhibits the hydrate formation slightly while hydrogen sulfide enhances hydrate formation considerably. This tip will extend the previous study on the natural gas hydrate formation phase behavior. Specifically, it will studyContinue Reading

Written on January 1, 2016 at 12:00 am
Categories: Gas Processing, Pipeline, Process Facilities

Adsorption Dehydration: Two-Tower vs Three-Tower System

There are different process configurations for adsorption dehydration systems. The most common arrangements are two-tower and three-tower configurations. One can find the details of the adsorption dehydration process and the descriptions of equipment in Chapter 18 of John M. Campbell textbook [1]. Figures 1 and 2 present a simplified process flow diagram for two-tower andContinue Reading

Written on November 1, 2015 at 12:00 am
Categories: Gas Processing, Pipeline, Process Facilities, Refining

What is the Impact of Feed Gas Conditions on the Adsorption Dehydration System?

Download PDF Version Adsorption dehydration units can reduce the water content of a gas stream to less than 0.1 ppmv.  The gas industry normally uses adsorption dehydration units upstream of a liquefied natural gas (LNG) plant or a deep natural gas liquid (NGL) extraction plant where the gas temperature reduces to less than -160 °CContinue Reading

Written on October 1, 2015 at 12:00 am
Categories: Gas Processing, Pipeline, Process Facilities