Difference Between Steam Reforming and Autothermal Reforming

Autothermal reforming (ATR) uses oxygen and carbon dioxide or steam in a reaction with methane to form synthesis. ... The reaction is exothermic due to the oxidation. The main difference between autothermal reforming and steam-methane reforming is that steam-methane reforming does not use or require oxygen.

1. What is autothermal reforming?
2. What is steam reforming process?
3. What is Autothermal?
4. How does steam methane reforming work?
5. How much co2 is produced from steam methane reforming?
6. What is the function of reformer?
7. What is the reforming process?
8. What catalyst is used in the steam reforming process?
9. Why is reforming important?
10. What is a synthetic gas?
11. What is oxygen excess ratio for ATR?

What is autothermal reforming?

Autothermal reforming, or ATR, combines steam methane reforming and partial oxidation into a single reactor. ... The partially oxidized mixture then passes through a catalyst bed in the lower part of the reactor where further adiabatic reforming reactions occur.

What is steam reforming process?

Steam reforming or steam methane reforming is a method for producing syngas (hydrogen and carbon monoxide) by reaction of hydrocarbons with water. Commonly natural gas is the feedstock. The main purpose of this technology is hydrogen production. ... The reaction is strongly endothermic (consumes heat, ΔH_r= 206 kJ/mol).

What is Autothermal?

chemistry. : of, relating to, or being a reaction that creates synthesis gas using only the heat produced by the reaction itself One of the major advantages of thermophilic digestion (anaerobic and aerobic) is the ability to operate the digester under autothermal conditions.

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.

How much co2 is produced from steam methane reforming?

The Carbon Footprint of Steam Methane Reforming

In the process of producing one molecule of CO₂, four molecules of hydrogen (H₂) are produced, with the steam contributing the additional hydrogen. Thus, per 1 million standard cubic feet (SCF) of hydrogen produced from methane, 250,000 SCF of CO₂ will be produced.

What is the function of reformer?

The purpose of the reformer is to upgrade heavy naphtha into a high-value gasoline blend stock by raising its octane. The primary product of the reformer is reformate. However, it also generates large amounts of hydrogen that can be used in the hydrotreaters and hydrocrackers.

What is the reforming process?

Reforming, in chemistry, processing technique by which the molecular structure of a hydrocarbon is rearranged to alter its properties. ... The process is frequently applied to low-quality gasoline stocks to improve their combustion characteristics.

What catalyst is used in the steam reforming process?

Steam reforming is the reaction of methane (and other higher hydrocarbons) with steam in the presence of a catalyst to form carbon oxides and hydrogen. Most industrial catalysts are based on using nickel as the catalytic component, although platinum group metals (pgms) are used for some specific duties.

Why is reforming important?

Reforming is a process designed to increase the volume of gasoline that can be produced from a barrel of crude oil. ... The octane rating of reformate is important because it affects the octane rating of the gasoline you buy at the pump.

What is a synthetic gas?

Syngas, or synthetic gas, is a fuel gas mixture consisting primarily of hydrogen, carbon monoxide, and very often some carbon dioxide. The name comes from its use as intermediates in creating synthetic natural gas (SNG) and for producing ammonia or methanol.

What is oxygen excess ratio for ATR?

In industrial practice the syngas outlet temperature from an ATR is in the range 900–1100 ºC with an oxygen/hydrocarbon ratio in the range 0.55–0.6.