Gas-Phase Conversions

Conversion of carbon dioxide and methane to value-added fuels and chemicals

Candidates for high-temperature plasma reactors are endothermic reactions with high activation energies. In view of our commitment to develop technology that contributes to a more sustainable future with reduced emissions of greenhouse gases, we have chosen to initially focus primarily on conversions involving carbon dioxide (CO2) and methane (CH4). With that goal in mind, our current focus is on the following reactions

Target Chemical Reactions

⇒ Dry reforming of methane to produce syngas (1:1)

CO2 + CH4 à 2CO + 2H2

⇒ Methane coupling to produce acetylene & hydrogen

2CH4 à C2H2 + 3H2

⇒ Carbon dioxide dissociation to produce carbon monoxide & oxygen

CO2 à CO + 1⁄2O2

By introducing a water-gas shift reactor into a process scheme based on the first reaction, we can easily modify the ratio of CO:H2 in the product stream by reacting water with carbon monoxide.

Likewise, by introducing a water-gas shift reactor into a process scheme based on the third reaction, we can produce hydrogen or syngas by reacting water with carbon monoxide.

These three chemical reactions can produce feedstocks for a wide range of intermediates and end products.

 

Syngas

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Acetylene and Hydrogen

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Carbon monoxide and oxygen

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Dry reforming of methane to syngas; Conversion of syngas to fuels and chemicals.

Methane coupling to produce acetylene and hydrogen; Uses of acetylene and hydrogen.

Dissociation of carbon dioxide to carbon monoxide and oxygen; Uses of carbon monoxide and oxygen.

The merchant markets for hydrogen and syngas are vast and growing rapidly. Most acetylene is used captively so the merchant market appears small, but total production is significantly higher that shown here to support the large vinyl chloride and related markets. Production of purified carbon monoxide is also greater than the merchant market shown for similar reasons, i.e. captive use.