To produce CAW, starch pyrolysed at 500-800C in the presence of a ferric metal as a catalyst in the atmosphere of Ar / H2, in a tube-furnace.

• 碳原子线是以马铃薯淀粉为固体碳源，以铁系金属为催化剂，在500-800℃的管式炉中、Ar/H_2气流下反应而成。