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Tag: CF Industries

People

ClimeCo says that it has promoted Dr. Scott Subler to Chief Science Officer (CSO). Subler has made an enduring mark on the carbon offset world over the last 15 years. From overseeing the first US offset delivery from a dairy farm methane capture project to chairing the Offsets Committee for the Chicago Climate Exchange, Subler has been a major influence on many carbon offset methodologies that are used today. His work investigating different types of lagoon cover systems for dairy and swine farms in different climates continues to impact new methane capture installations, and his advocacy for organic waste composting projects resulted in the protocol used today at the Climate Action Reserve.

Plant Manager+

A Stamicarbon urea plant attempts to start up after a scheduled turnaround. Due to maintenance issues, it is necessary to shut down and block in the synthesis section several times. Although licensor’s procedures have been followed, several signs of active corrosion are noticed in the liner of the reactor. What could the cause be for this unexpected behaviour? Can sharing experiences from colleagues from other urea plants provide valuable support to find the root cause or even provide new insights into possible new causes? One observation is that the typical heating up rate of a liner in a reactor is much higher than recommended (refer to diagram). The condensation heat of steam heats up the liner much faster than the carbon steel pressure bearing wall. This creates stress on the liner and affects the lifetime of the liner. Another observation is a temperature rise in the reactor during a blocking in situation. This can be a cause for loss of oxygen required for passivation, resulting in higher corrosion rates.