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Replacing natural gas by hydrogen

Q: What must be considered to replace natural gas by hydrogen as combustible for burners in a cracking furnace?

A: Use of hydrogen instead of natural gas in a cracking furnace would require replacement of fuel train and possibly the burner.
 
Also, the regulation of combustion air will have to be modified to accommodate hydrogen.

Here are more of the latest questions on: Combustion

Can you explain buoyant thermal force?
In flare tips, we know at minimum flow at low velocity and with no wind the flame of the flare tip is almost vertical. If the wind velocity increases the flame goes horizontal.

We need to explain to our client why this happens. We only know this is a phenomenon called buoyant thermal force, but we do not know the background and governing equations of this behavior. Can you explain?

Can you suggest routine checks for a furnace?
We have a Foster-Wheeler-designed furnace for reforming natural gas. The furnace is induced draft and has two chambers. Can you suggest routine checks an operations engineer must do during normal operation?

Is soot-blowing still applicable?
Is soot-blowing still applicable when natural and or fuel gas with <0.05 wt percentage H2S and <0.1 C6+ is being fired? To me this is a waste of money if the frequency is once a day. On other furnaces and boilers the convection sections are being cleaned every five years with the same fired fuel. I need to convince the owners.

What safety requirements are necessary for a fuel switchover on a furnace?
We have a natural draft furnace designed to use the fuels hydrogen, natural gas and LPG. In the event of a fuels changeover while the furnace is on-line, what are all the safety instruments and controls that should be considered to safeguard the equipment and operating personnel?

Is there a formula to calculate how much wood was present prior to burning?
Is there a formula for calculating remaining wood as residue to calculate how much wood was present prior to being burned? And if so, could the formula be used on remaining wood ash residue that has been exposed to the elements for seven months?

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