Process Gas Chromatographs
In an ammonia plant, methane is mixed with steam in a reformer, and through a chemical process, carbon dioxide is removed and air is added to achieve commercial products such as nitrate fertilizers and smelling salts.
Click Here To Download:
Application Note: Improving Ammonia Plant Performance With Process Gas Chromatographs
•Application Note: Improving Polyethylene Plant Performance With Process Gas Chromatographs
Ammonia Plants
In an ammonia plant, methane is mixed with steam in a reformer, and through a chemical process, carbon dioxide is removed and air is added to achieve commercial products such as nitrate fertilizers and smelling salts.
- Maintain a hydrogen-to-nitrogen ratio for optimum synthesis conversion
- Monitor for unconverted carbons
- Monitor for complete remove of carbon monoxide
- Optimize purge gas rates and rate BTU for use as fuel gas
Methanol Plants
Methanol is a critical building block for numerous products, including formaldehyde, resin glues, synthetic rubber, and fungicides, as well as in common consumer items like nail polish remove and aspirin.
Without accurate measurements, methanol plants can experience sub-optimal reformer performance that reduces methanol products and methanol impurities that reduce product value and compromise product specifications. The data that an Emerson gas chromatograph provides will help a methanol plant to:
- Monitor for unconverted carbons
- Minimize losses of methanol in acetone tower overhead
- Minimize impurities in the methanol product stream
- Minimize losses of methanol in methanol tower bottom stream
Ethylene Plants
An ethylene plant produces polymer-grade ethylene (99.99%) and produces major by-products such as propylene, a butadiene-rich C4 stream and C6-C8 aromatics-rich pyrolysis gasoline. The ethylene plant is the major supplier of feedstock to the polyethylene plant for the creation of polyethylene plastics. Due to the commodity nature of ethylene, product quality is critical to a plant, making the monitoring of product quality critical, since off-specification product cannot be sent to the product pipeline and must be disposed of – usually to a flare system. Product specifications for ethylene and propylene vary widely from plant to plant, but industry-wide, specs for product purity are getting increasingly tighter, with some compounds now being limited to parts-per-billion levels.
In the cracking furnaces, an Emerson gas chromatographs provides data for:
- BTU firing rate
- Velocity control
- Conversion control
In fractionators, Emerson gas chromatographs provide data to help you:
- Maximize ethylene recovery
- Control impurities in ethylene product
- Monitor acetylene reactor efficiency
- Control impurities in propylene and ethylene products
- Maximize ethylene recovery
- Control butane impurities
- Control propane impurities in C4 olefins product
- Maximize C4 olefin recovery
Polyethylene Plants
In a polyethylene plant, an efficient, accurate process is critical to maintain the quality of plastics. Any impurities in the carbon dioxide, C1, C2. or acetylene will degrade the catalyst, and a specific ratio of hydrogen to carbon must be maintained to control the melting point. Emerson's gas chromatographs are the ideally suited to measure and track critical data, to ensure an optimum process. With an Emerson gas chromatograph, you can:
- Measure ethylene feed purity
- Measure comonomer feed purity
- Monitor impurities recycled with the diluent
- Attain feedback on reaction kinetics
Polypropylene Plants
A high quality of plastic is absolutely critical, and impurities in C2, C3, MA, and PD degrade the catalyst, which, in turn, impacts the quality if the plastics. In addition, flash tank measurements of C3, hydrogen, and hexene-1 indicate reaction quality.
With Emerson's gas chromatograph products, polypropylene plants can monitor these critical variables to ensure that the process is performing at optimum levels. With an Emerson's gas chromatographs, you can:
- Ensure propylene feed purity
- Ensure diluent feed purity (exact components may vary with the diluent used)
- Ensure hydrogen feed purity
- Ensure comonomer feed purity
- Send data to the control system about reaction kinetics
- Monitor impurities recycled with the diluent
- Monitor impurities recycled with the propylene
Click Here To Download:
•Application Note: Improving Ammonia Plant Performance With Process Gas Chromatographs
•Application Note: Improving Polyethylene Plant Performance With Process Gas Chromatographs