Consolidating multiple flares can help mitigate emissions and maintenance Chris Ng and Zubin Kumana Siemens, Process Safety Consulting Many petroleum-refining and petrochemical facilities have experienced tremendous growth in recent years in response to increasing demand for fuels and chemical precursors.…
Ensuring optimal performance of shell-and-tube heat exchangers requires knowledge of the controlling fluid, correct exchanger geometry and configuration, as well as proper fluid placement Satyendra Kumar Singh Simon India Ltd. Optimizing the thermal design of a shell-and-tube heat exchanger…
Applying dynamic simulation models to tube-rupture scenarios can help ensure more accurate sizing and hazard assessments Tube rupture in heat exchangers is an extremely serious issue in the chemical process industries (CPI; Figure 1). Heat-exchanger tube-rupture scenarios can be evaluated…
Successful dispersion depends on a basic understanding of dispersion equipment and how dispersers should be used High-shear mixers typically operate at high rotational speeds and are used for mixing applications that are best described as dispersion processes. They can be…
With a global nominal capacity of about 140 million ton/yr, ethylene is among the main petrochemicals produced worldwide, and is a key building block for the industry. Ethylene is produced mostly via steam-cracking of petroleum-based feedstocks, such as naphtha. Ethylene…
Dimensionless numbers refer to physical parameters that have no units of measurement. These numbers often appear in calculations used by process engineers. As long as consistent units are used, dimensionless numbers remain the same whether metric or other units are…
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Researchers at the National Institute of Advanced Industrial Science and Technologys (AIST) Interdisciplinary Research Center for Catalytic Chemistry (Tsukuba, Japan; www.aist.go.jp) have developed a new reaction process to synthesize aromatic urethane — a promising starting material for the production of…
A modular, skid-mounted hydrogen-production plant developed by Linde AG (Munich, Germany; www.linde.com) uses a modified version of conventional steam-methane reforming (SMR) to generate hydrogen from inexpensive natural gas, rather than relying on more costly methods of hydrogen production, such as…
For the first time, polypropylene carbonate (PPC) polyol, a versatile polymer made from CO2, is available at a commercial scale. Produced by Novomer Inc.’s (Waltham, Mass.; www.novomer.com) polymerization process, PPC polyol has been adopted into a formulation for polyurethane hot-melt…