Name two methods of hydrogen generation used in refineries.

Name two methods of hydrogen generation used in refineries.

• A. Catalytic Reforming and Steam/Methane Reforming
• B. Electrolysis and Coal Gasification
• C. Partial Oxidation and Gasification
• D. Steam Reforming and Hydrotreating

Answer: (A)

Hydrogen for refinery processing is generated on site, with the two most common methods being steam reforming of methane and catalytic reforming of naphtha. Steam reforming is the workhorse for making large quantities of hydrogen. It uses methane (natural gas) and steam over a catalyst to produce a synthesis gas of carbon monoxide and hydrogen (CH4 + H2O → CO + 3H2). The hydrogen yield is enhanced further by a water-gas shift step (CO + H2O → CO2 + H2), which converts more CO into additional H2. Refineries favor this route because natural gas is readily available on site, and the process can be integrated with heat recovery to be efficient. Catalytic reforming, besides upgrading low-octane naphtha into high-octane gasoline components, also generates hydrogen as a byproduct. The reforming reactions break down larger hydrocarbons and release hydrogen-rich gas streams that can be separated and routed to the refinery hydrogen network for hydrotreating and hydrocracking. Other listed methods either don’t primarily serve hydrogen production in refineries or rely on processes that consume hydrogen rather than generate it (electrolysis, hydrotreating itself, or to a lesser extent coal gasification and partial oxidation for syngas).

Hydrogen for refinery processing is generated on site, with the two most common methods being steam reforming of methane and catalytic reforming of naphtha.

Steam reforming is the workhorse for making large quantities of hydrogen. It uses methane (natural gas) and steam over a catalyst to produce a synthesis gas of carbon monoxide and hydrogen (CH4 + H2O → CO + 3H2). The hydrogen yield is enhanced further by a water-gas shift step (CO + H2O → CO2 + H2), which converts more CO into additional H2. Refineries favor this route because natural gas is readily available on site, and the process can be integrated with heat recovery to be efficient.

Catalytic reforming, besides upgrading low-octane naphtha into high-octane gasoline components, also generates hydrogen as a byproduct. The reforming reactions break down larger hydrocarbons and release hydrogen-rich gas streams that can be separated and routed to the refinery hydrogen network for hydrotreating and hydrocracking.

Other listed methods either don’t primarily serve hydrogen production in refineries or rely on processes that consume hydrogen rather than generate it (electrolysis, hydrotreating itself, or to a lesser extent coal gasification and partial oxidation for syngas).