Petrochemicals

Flare Minimization Via Dynamic Simulation

Mar 15, 2011
Kuyen Li
Flaring in chemical process industry (CPI) is an important method to protect equipment and personnel safety during the process upset and the chemical plant turnaround. However, excessive flaring emits lots of carbon dioxide as well as air pollutants, which cause negative environmental and social...

Improving Ethylene Charge Gas Compressor Performance

Mar 15, 2011
Giorgio Greco
The changing landscape of the ethylene industry requiring more feedstock flexibility and upstream and downstream integration increases the complexity of cracker design and management exacerbating challenges traditionally present in ethylene plant operations such as the fouling phenomena. The...

Trip & Throttle Valve Reliability

Mar 15, 2011
Joan del Castillo
Trip & Throttle Valve Reliability Trip & Throttle (or Stop) valves are used in ethylene plants to isolate the energy to steam turbines when required. They are critical Safety Protection components with a high impact on a plant’s reliability; however, they operate under tough conditions like...

Enhance Cracked Gas Compressor Reliability with Novel Antifoulant Technology

Mar 15, 2011
P. N. Ramaswamy
Enhance Cracked Gas Compressor Reliability with Novel Antifoulant Technology It is widely known that there is a potential for fouling in Cracked Gas Compressors within Ethylene plants. Gas crackers have generally had a higher fouling potential than liquid crackers due to the lack of aromatic...

Mitigation of Preheat Fouling by Eliminating the Cause

Mar 15, 2011
Irv Wiehe
Today, there is no excuse for not getting five years or more on the run length of refinery preheat exchangers without the need for cleaning. Among the many tools available for fouling mitigation of preheat exchangers, the most overlooked ones involve determining and eliminating the cause. Almost...

Ethylene Boil-off Compressor Process Safety Incident

Mar 15, 2011
Niara Eckhard Uhlein
Braskem, a Brazilian player among petrochemical manufacturers, produces monomers, resins and chemicals specialties. The overall Ethylene capacity is 3,600 KTA, distributed in six Olefins plants. Naphtha is the main raw material of the petrochemical and plastic productive chain in Brazil, followed...

Increased Fouling Potential and Mitigation Plans for Heavy Sour Crude Oils

Mar 15, 2011
Parag Shah
It is becoming a widespread norm that refineries are processing an increasing quantity of heavy and sour crudes than ever before. The depleting oil reserves of light sweet crudes have resulted in the need for deeper exploration. Considerable finds in the Orinoco belt of Venezuela, California and...

Cracked Gas Compressor Control Tutorial

Mar 15, 2011
Nauman Islam
The market conditions over the couple of years has prompted many end-users to review antisurge control design to help lower their energy index. A number of factors affect antisurge control system design and consequently impact the surge control margins. Cracked/charge gas compressors have evolved...

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