For the cap of nanotube, it can be seen as the prolongation of the tube wall, therefore, the electronic structures of tube with capped ends are close to the tube with open ends.

To well control the tube wall temperature of reformer, well adjust top spring hanger on the reformer tube and well control the flame from burner on the top of furnace is important during operation.

The paper writes that it is better to increase the wall thickness of the body upper tube, rear tail tube and mounting plate for the rear sock absorber and also gives Suggestions for some structures.