Propane Dehydrogenation

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  • Propane Dehydrogenation - A catalytic process that converts propane into propylene and hydrogen (byproduct).
  • The yield of propylene from propane is about 85 wt%. The reaction by-products (mainly hydrogen) are usually used as fuel for the propane dehydrogenation reaction.As a result, propylene tends to be the only product, unless local demand exists for the hydrogen by-product.
  • Engines, oxy-gas torches, barbecues, portable stoves, and residential central heating and cooking units in recreational vehicles use propane as a fuel source.
  • Dehydrogenation Process - This process converts propane to propylene on a fixed-bed of chromia-alumina catalyst in order to recycle the unconverted propane and leave propylene as the net product. The chemical reaction occurs during the gaseous phase at high temperatures (ranging from 540 to 820 degrees C) that causes an endothermic equilibrium reaction.
  • Propane dehydrogenation (PDH) is a key processing step in the on purpose production of propylene from propane feedstock.
  • Propylene is the world’s 2nd largest petrochemical commodity and attributes its demand growth largely to the further production of polypropylene, which is used in a wide range of every day products from grocery packaging to weather resistant clothing
  • Propane dehydrogenation was considered to be uneconomical, but low propane prices in the Middle East have made it feasible as several units are being constructed in Saudi Arabia.
  • Minute amounts of propylene, butane and butylene mix with propane to create a liquefied petroleum gas to power certain vehicles and some forklifts.
  • Any development of catalytic propane dehydrogenation technology has to consider (1) the supply of sufficient heat, (2) the avoidance of decomposition of the feed and effluents, (3) the minimization of the pressure drop in the catalytic bed, (4) the optimization of the catalyst formulation working at the desired temperature and with reasonable operational lifetimes, and (5) the burning off of coke from the catalyst surface without altering its activity/selectivity

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