What is pre reforming?
Pre-reforming is the process by which methane and heavier hydrocarbons are steam reformed and the products of the heavier hydrocarbon reforming are methanated. The adiabatic pre-reformer is usually positioned upstream of the main steam reformer and uses a catalyst with high nickel content.
What does the Prereformer do?
The pre-reformer is an adiabatic catalytic reactor placed upstream the reformer in which the higher hydrocarbons contained in the natural gas feed are converted into methane thus preventing the formation of coke in the primary reformer feed preheat coil and at the catalyst tube inlet.
How does steam methane reforming work?
In steam-methane reforming, methane reacts with steam under 3–25 bar pressure (1 bar = 14.5 psi) in the presence of a catalyst to produce hydrogen, carbon monoxide, and a relatively small amount of carbon dioxide. Steam reforming is endothermic—that is, heat must be supplied to the process for the reaction to proceed.
What type of reactor is used for steam methane reforming?
Membrane reactors for methane steam reforming (MSR) Therefore, in order to intensify the whole process, a membrane reactor can be used as alternative solution to conventional systems.
What is steam methane reformer?
Steam methane reforming (SMR) is a process in which methane from natural gas is heated, with steam, usually with a catalyst, to produce a mixture of carbon monoxide and hydrogen used in organic synthesis and as a fuel 1. In energy, SMR is the most widely used process for the generation of hydrogen 2.
What is a reformer reactor?
A methane reformer is a device based on steam reforming, autothermal reforming or partial oxidation and is a type of chemical synthesis which can produce pure hydrogen gas from methane using a catalyst.
Why is steam reforming endothermic?
Steam-Methane Reforming Steam reforming is endothermic—that is, heat must be supplied to the process for the reaction to proceed. Subsequently, in what is called the “water-gas shift reaction,” the carbon monoxide and steam are reacted using a catalyst to produce carbon dioxide and more hydrogen.
What is steam reforming?