(52f) Assuring Ethylene Purity: Reliable Ppm and Ppb Measurement of Acetylene with Online TDL Analyzers
AIChE Spring Meeting and Global Congress on Process Safety
2013
2013 Spring Meeting & 9th Global Congress on Process Safety
The 25th Ethylene Producers’ Conference
Improvement of Ethylene Plant Operations
Tuesday, April 30, 2013 - 10:10am to 10:30am
Real-time measurement of certain trace gas species during ethylene production is critically important for optimized production and quality control. Trace gas species such as ammonia (NH3), moisture (H2O) and acetylene (C2H2) need to be maintained at appropriate concentration levels to achieve optimum catalytic efficiency, catalyst life time and reactor throughput without compromising product purity for polymerization processes. This requires accurate monitoring of these trace gases at various stages of the ethylene production process.
Conventional detection of acetylene primarily relies upon gas chromatograph (GC), which comes with a high cost of ownership, high requirements for operator expertise, intensive maintenance and slow (several minutes) measurement response times. This paper will introduce TDL analyzers SpectraSensors developed for C2H2 measurements in various stages of the ethylene production process. This paper will describe system design and present both lab experiment and field operation data for C2H2 measurements in the range of 0-10 ppmv, 0-100 ppmv and 0-5000 ppmv. Employing 2nd-harmonic (2f) spectroscopy, multipass Herriott cells, advanced spectroscopy analysis algorithms, a fast Reduced Instruction Set Computer (RISC) and compact modular sample handling systems, these analyzers have demonstrated fast response time (in seconds), superior detection sensitivity and reading repeatability. The analyzers achieved 3σ repeatability of better than ±50ppbv for 0-10 ppmv measurement range, better than +/- 2% of full scale for 0-100 ppmv and 0-5000 ppmv ranges.
Checkout
This paper has an Extended Abstract file available; you must purchase the conference proceedings to access it.
Do you already own this?
Log In for instructions on accessing this content.
Pricing
Individuals
2013 Spring Meeting & 9th Global Congress on Process Safety
AIChE Pro Members | $150.00 |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $225.00 |
Non-Members | $225.00 |
The 25th Ethylene Producers’ Conference only
AIChE Pro Members | $100.00 |
Fuels and Petrochemicals Division Members | Free |
AIChE Graduate Student Members | Free |
AIChE Undergraduate Student Members | Free |
AIChE Explorer Members | $150.00 |
Non-Members | $150.00 |