Yaphank, N.Y., August 4, 2014 - COSA Xentaur a leader in innovative measurement solutions, today announced product updates to its Dew Point Measurement Solutions for the Natural gas gathering Systems, Waste, Bio Fuel, Power Generation and hydrocarbon streams plus any application where the moisture measurement is “Mission Critical. Major highlights include consistently accurate monitoring results for dew point in natural gas and other difficult hydrocarbon processing applications and a cost effective fully automatic self-calibration. This dew point system is proven to produce consistently accurate monitoring results for dew points in natural gas and other difficult hydrocarbon processing applications, where conventional analyzers have failed.
Natural gas is found in vast underground geological structures and can be extracted via wells. Other sources of natural gas are from the refining of crude oil and a number of biofuel processes. All these sources produce a “wet” stream of gas requiring drying initially done with ethylene glycol. For applications where the natural gas will be converted to LNG or used as a feedstock for chemical processes, secondary drying is required which is usually accomplished with molecular sieve systems. For moisture measurement, the gas pipeline industry is unique in that moisture is specified as a density measurement. In the US lbs. /mmft3 (pound of H2O per million cubic feet of gas) at 60F is used. For Europe moisture is expressed as a pressure of dew point of 8C at 70 Bara. Although these measurements sound quite different, from an absolute concentration point they are quite close. 143 ppmv H2O for U.S specifications and 151 ppmv H2O for European applications. When natural gas is used as feedstock or will be compressed into liquid form, the moisture is expressed as a concentration normally in ppmv units. As noted above secondary drying is employed which drops the moisture level to single digit ppmv levels for feedstocks and down to ppb levels for LNG. The Xentaur HTF™ sensors have industry leading sensitivity providing sufficient accuracy and repeatability for all these ranges. Similarly, other hydrocarbon streams in chemical process will also be dried to low moisture levels.
Moisture in natural gas and hydrocarbon streams can cause a number of different issues. In pipelines where most of the gas is used as a fuel, water can condense in the compressor stations accelerating corrosion. At the combustion point, moisture absorbs heat reducing the amount of energy available for heating or doing other work. In gas feedstock’s, moisture is a poison for most catalysts used in chemical processing. At LNG terminals because of the cryogenic temperatures, even low moisture can cause freeze ups and form solid hydrates in the systems.
The bottom line is moisture must be controlled. In drying processes such as ethylene glycol and mole sieve, the ethylene glycol carried into the process gas after the driers as an aerosol and particulate from the mole sieve can also be carried by the gas. In hydrocarbon streams there are also a number of other contaminants that can be present including condensed hydrocarbons themselves. Any of these contaminants can impact sensor performance no matter what technology is employed.
The Xentaur HTF™ Advantage
Taking advantage of the uniquely strong and quasi-linear response characteristics of its HTF™ aluminum oxide dew point sensors, Xentaur has developed a cost effective solution for demanding and critical moisture monitoring applications. The Xentaur Mission Critical Process Moisture Analyzer is specifically designed to handle the rigorous demands of moisture measurement in natural gas or hydrocarbon streams. This robust system automatically resets the sensor-calibration on-line with minimal disrupting negating the impact of process gas contaminants.
The system has an integrated, fully automatic self-calibration procedure, in which the sensor is periodically exposed to a NIST certified calibration gas and recalibrated. Thus, there can be high NIST traceable confidence in the measurement and sensors do not need to be returned to the factory for calibration.
The advantages of a linear high capacitance response are: better sensitivity, better repeatability and faster response times. Also, the measurement system is less prone to noise and drift, and signal conditioning is kept to a minimum.
This dew point system has proven to produce consistently accurate monitoring results for dew point in natural gas and other difficult hydrocarbon processing applications, where conventional analyzers have failed. Recent updates to the system including the next generation of the HTF™ sensor technology, a more ergonomic enclosure, better filtration and temperature control.
Learn more at http://cosaxentaur.com/dewpoint-measurement-solutions
About COSA Xentaur
COSA Xentaur combines the strength of over 30 years of COSA Instruments sales, service and application support and experience with Xentaur Corporations innovative measurement solutions. Its portfolio ranges from dew point measurement solutions, analytical laboratory equipment, NMR technology, WOBBE and BTU analyzers. As a reliable partner, COSA Xentaur creates trustful relationships to help its customers in virtually all industries to be more successful in implementing innovative measurement solutions. With its high-value products and intelligent solutions, COSA Xentaur delivers robust, cost effective instrumentation systems exceeding customer measurement requirements.
Learn more at http://cosaxentaur.com