Effect of temperature on multiple competitive processes for co-production of carbon nanotubes and hydrogen during catalytic reforming of toluene

[Display omitted] •H2 yield increased by 7 times while its purity decreased 5% from 500 °C to 800 °C.•Coke amount initially increased to maximum at 650 °C then remarkably decreased.•High temperature enhanced conversion of amorphous carbon to improve CNTs quality.•Almost no CNTs generated at 800 °C d...

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