Category Archives: Gas Processing

Glycol dehydration is the most common dehydration process used to meet pipeline sales specifications and field requirements (gas lift, fuel, etc.). Triethylene glycol (TEG) is the most common glycol used in these absorption systems. At atmospheric pressure and a maximum reboiler temperature of 204 °C [400 °F] the highest glycol concentration of lean TEG thatContinue Reading

Glycol dehydration is the most common dehydration process used to meet pipeline sales specifications and field requirements (gas lift, fuel, etc.). Triethylene glycol (TEG) is the most common glycol used in these absorption systems. In this Tip of The Month (TOTM), the effect of stripping gas rate on the regenerated lean TEG concentration for severalContinue Reading

An important physical property of a gas is the ratio of heat capacities. Heat capacity ratio is defined as the heat capacity at constant pressure divided by heat capacity at constant volume . It is used in the design and evaluation of many processes. For example, it is used in the design of components andContinue Reading

In March 2013 (TOTM), we estimated capital costs (CAPEX) as a tool to compare then select the operating conditions and associated facilities for a long distance – high volume flow gas transmission pipeline located onshore. In this month’s Tip of the Month (TOTM), we will consider the same cases discussed in the January 2013 (TOTM)Continue Reading

In recent TOTMs (January through April, August, and September 2012 and again in January 2013), we discussed several aspects of the physical behavior and transportation of carbon dioxide (CO2) and natural gas in the dense phase. We illustrated how thermophysical properties change in the dense phase and their impacts on pressure drop calculations. The pressureContinue Reading

What is Mentoring? In this Tip of the Month, we explore how process safety competency can be enhanced through mentoring programs. This TOTM is the paper that was developed by JMC Instructor/Consultants Clyde Young and Keith Hodges presentation at the Center for Chemical Process Safety (CCPS) 8th Global Conference on Process Safety in April, 2012. Continue Reading

Capital Cost (CAPEX) Comparisons High pressure (or dense phase) is increasingly used for transporting large volumes of carbon dioxide (CO2) and natural gas over long distances. In this month’s – Tip of the Month (TOTM), we continue to explore key aspects of dense phase transportation in pipelines. This month’s focus is on the estimation ofContinue Reading

A phase envelope with hydrate and water dew point curves is an excellent tool to find what phase water is in at operating conditions, during start-up, during shut-down and during upsets. In the November 2007 Tip of the Month (TOTM), we discussed the phase behavior of water-sour natural gas mixtures. In this tip, we willContinue Reading

The solubility of acid gases in TEG solution has been the subject of two previous Tips of the Month, (June 2012 and July 2012).  In these instances, the focus was on gas streams with maximum acid gas partial pressure of 100 psia (690 kPa) and TEG concentrations of 95 and 100 wt%.   This is typicalContinue Reading

OSHA mentions “near-misses” as recordable requirements in several passages as: “An unplanned and unforeseeable event that could have resulted, but did not result, in human injury, damage to property or the environment or other form of loss”.  And we know that all industrial maintenance organizations have a history of reactive, run-to-failure-then-run-to fix, maintenance management behaviors. Continue Reading