The hydrogen gas produced from ATR is a mixture of hydrogen, nitrogen (from the air), carbon dioxide and small quantities of other gases. This station produces 12 kg of hydrogen per day.Īutothermal reforming uses a process in which natural gas is reacted catalytically at high temperature with oxygen and steam at high temperature to produce hydrogen.
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(A Chevron Technology Ventures engineer described the difference between the two operations as knowing how to build an elephant, and figuring out how to build an ant.)Īnother Chevron hydrogen energy station built at the Hyundai-Kia America technical Center in Chino uses autothermal reforming (ATR) rather than steam methane reforming to produce hydrogen from natural gas. The mainstream refinery operation that focuses on the bulk production of hydrogen for use in refining processes isn’t involved. The hydrogen production and refueling component is driven by Chevron Technology Ventures-a subsidiary of Chevron that is focused on new energy technologies, including wind and biofuels. The HyRoad project is part of the DOE Technology Validation program.
The 6,250 psi pressure at the pump dispenser is appropriate to fuel vehicle tanks to 5,000 psi.
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This is further compressed to 6,250 psi, and stored in a series of cascade storage vessels. A pressure swing absorption (PSA) unit accepts the compressed reformate and delivers 99.99% pure hydrogen. The reformate is compressed to approximately 125 psi-the pressure needed to separate hydrogen from contaminants in the gas stream. The two Steam Methane Reformers produce a reformate stream typically composed of 75% hydrogen, 20% CO 2 and other trace gases including CO and CH 4 (methane). The Chevron hydrogen station will dispense up to 150 kg of hydrogen daily-enough to fuel the three 40-foot fuel cell buses and 10 fuel cell vehicles. It then purifies, compresses, and stores the gas for use as a vehicle fuel. The Chevron hydrogen energy station uses dual on-site steam methane reformers (SMR) to produce hydrogen from natural gas.
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