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Natural Gas Substitute - Reverse Reforming

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Natural Gas Substitute - Reverse Reforming

Post by ioncube on Thu Jul 12, 2012 5:40 am

Before reading the main article you must know the following basics:

Useful methods of desulphurisation (removal of H2S)

  • Claus Process
  • Wet sulphuric acid process

Reader must be able to acknowledge that this process is reverse of Reforming technique which is largely endothermic, thus, our reaction is largely exothermic!
Another exothermic reaction that 'regulates' CO, CO2 & H2 percentage is Water gas shift reaction
Metal dusting is a comprehensive topic so lets just discuss basics alone:

Metal dusting is a severe form of corrosive degradation of metals and alloys at high temperatures (300-850oC) in carbon-supersaturated (high partial pressure of CO) gaseous environments. Fe, Ni and Co, as well as alloys based on these metals are all susceptible. Four regimes of corrosion were identified for Fe as a function of temperature (figure 1 & 2).

  1. rapid uptake of carbon into the metallic phase leading to supersaturation of carbon in the alloy,
  2. formation of metastable carbides (for steels, Fe3C),
  3. decomposition of these carbides when localized deposition of carbon occurs, and
  4. development of a loosely adherent mixture of filamentary carbon and metallic particles, which then act as catalysts for further carbon deposition.


...& finally because we are dealing with reversible reactions while reading, keep in mind the Le Chatlier principle with respect to temperature & concentration. Already know this principle why not take this quiz
[docis]documentId=120712003955-e4ff9f62ad7b4c62a48dd45527080c3e[docis]
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