In the Part – 1, July Tip of the month (TOTM), [1], the following items were discussed briefly: Benzene, toluene, ethylbenzene, and xylene are members of the aromatics hydrocarbon family group, often referred to as BTEX. These aromatic compounds are also belonged to the broader category of Hazardous Air Pollutants (HAPs) [2]. BTEX can beContinue Reading
I. Introduction: Gas Lift Operational FundamentalsPart 1 of this Series on Gas Lift History and Basic Well Parameters focuses on the primary “state of affairs” of Gas Lift operations in the USA. A discussion was presented related to a candidate Gas Lift well’s completion design that included a typical Casing/Tubing sizing sequence. The function ofContinue Reading
1.0 Introduction LNG and gas processing plants often have some units that are identical; viz acid gas removal unit (AGRU), mol sieve dehydration unit (MSDU) and mercury removal unit (MRU). The degree of gas sweetening (AGRU) and the degree of water dew point (MSDU) is dependent on the requirement i.e., is the gas goingContinue Reading
Raw natural gas that is produced from the reservoir always requires some type of conditioning and processing before we can transport that gas to the customers. Why is gas conditioning and processing necessary? Because our sales gas, and liquid hydrocarbon products that we produce must meet the sales / product specifications. These specifications are setContinue Reading
BETX stands for benzene, ethylbenzene, toluene, and xylene, a group of compounds that all belong to the broader category of Hazardous Air Pollutants (HAPs). Benzene and ethylbenzene are known carcinogens, and have also been shown to cause blood disorders, impact the central nervous system and the reproductive system. Additionally, Toluene may affect the reproductive, respiratoryContinue Reading
The May 2015 tip of the month (TOTM) [1] presented a method which allows the users to estimate the decline of their adsorbent based on only one performance test run (PTR) for molecular sieve dehydrators using low pressure regeneration. This permits early formulation of a credible action plan. Site-specific factors will determines an adsorption unit’sContinue Reading
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
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 May 1, 2015 at 12:00 am, by Harvey Malino
Molecular sieves are used upstream of turboexpander units and LNG facilities to dehydrate natural gas to <0.1 ppmv water content. In the natural gas industry, the molecular sieves employ heat to drive off the adsorbed water. Figure 1 shows a typical flow schematic for a 2 tower system; Figure 2 shows a 3 tower system.Continue Reading
Water is produced with oil and gas. A question that comes to mind is: “Why is water important?” The presence of water may cause corrosion, freezing and hydrate formation. All of these problems are enhanced by the presence of acid gases such as H2S and CO2. The water content of a gas depends on theContinue Reading