Monday, August 23, 2010
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Free article from Chemical Engineering for August 2010.
Synthetic natural gas
Technology developed 40 years ago to convert coal into substitute natural gas is making a comeback - processes to make Bio-SNG are approaching
FAYF - Heat Transfer Fluid - Filtration
Indirect heating of processes by organic thermal-liquid fluids offers highly reliable operation, and the heat transfer systems are generally treated as low-maintenance utilities. Occasionally, the heat transfer fluid can become contaminated, resulting in the formation of sludge particles, or other sources of dirt can in-filtrate the system. This contamination can cause operational problems. The solid particulates can cause shaft-seal leakage in the circulation pump, valve stem wear, plugging of flow passages and sometimes fouling of heat exchange surfaces. After contamination, the fluid can sometimes be cleaned by in-system, side-stream filtration. For seriously fouled systems requiring more extensive cleaning, the heat transfer fluid can sometimes be cold filtered outside of the system. Side stream filtration may also enhance the performance of pump suction strainers on startup of a system.
Oh What a Relief it is!
Improvements in pressure relief devices provide advanced process protection
Foolproofing Regulatory Document Generation
Software helps ensure that you always have the right data in the right format
pH Measurement And Control
When measured correctly, pH can be an invaluable tool for both product and process control
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