Methanol-water fuel reforming hydrogen production system

Abstract

The invention discloses a methanol-water fuel reforming hydrogen production system. The system comprises a methanol-water fuel feeding pipe, an evaporator, a modifier, a CO oxidation removal device and a hydrogen-rich mixed gas conveying pipe which are connected in sequence. The CO oxidation removal device comprises an LTS catalytic oxidizer and a PROX catalytic oxidizer, a copper-zinc-based catalyst is arranged in the LTS catalytic oxidizer, and a ruthenium-based catalyst is arranged in the PROX catalytic oxidizer. The hydrogen-rich mixed gas is subjected to staged oxidation treatment throughthe LTS catalytic oxidizer and the PROX catalytic oxidizer, so that the CO concentration in the gas is gradually reduced to guarantee that CO is completely removed. According to the system, the conversion rate of methanol can reach 100%, CO in the reformed mixed gas can be completely removed, the starting time of the system is short, the reforming hydrogen production condition can be rapidly achieved, energy consumption is low, the hydrogen production speed is high, the hydrogen production cost is low, the energy conversion efficiency is high, environmental protection and energy conservationare achieved, and the power generation efficiency is high after the system is in butt joint with a fuel cell stack.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by reforming methanol, and in particular relates to a hydrogen production system by reforming methanol water fuel. Background technique [0002] Energy and the environment have become the primary issues facing the development of countries all over the world. The emergence of hybrid vehicles and fuel cell vehicles using hydrogen as energy provides effective solutions to alleviate the energy crisis and protect the environment. Further improving the efficiency of on-board hydrogen production to provide high-purity hydrogen sources for fuel cells has gradually become the focus of attention. Methanol has the advantages of high hydrogen content, no sulfur, low CO content in the reformed product, and low reaction temperature. It has always been an important raw material for hydrogen production by reforming. The mixed gas produced by methanol steam reforming for hydrogen production has a high...

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Problems solved by technology

However, although the cost of the palladium composite membrane is low, the purification efficiency is high, and the output is large, the purity of the hydrogen separated by the palladium composite membrane is low. The purity of the hydrogen produced is generally only about 99%, and it is difficult to reach more than 99.999%.

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