What is the major drawback of steam methane reforming technique to produce hydrogen?

Explanation: The steam-methane reforming technique is the current leading technology to produce hydrogen. However, the main drawback of steam-methane reforming technique is that it releases greenhouse gases, carbon dioxide and carbon monoxide into the atmosphere.

Is steam reforming expensive?

Steam reforming of natural gas is 65–75% efficient. Globally, almost 50% of hydrogen is produced via steam reforming. It is currently the least expensive method for hydrogen production available in terms of its capital cost.

What catalyst is used in steam methane reforming?

nickel
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.

What is methane steam reforming?

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 GREY and blue hydrogen?

Production of grey hydrogen from natural gas throws off carbon waste. That is its production results in the production of large volumes of carbon dioxide. Blue hydrogen is cleaner version for which the emissions of carbon are captured and stored, or reused.

What is steam methane reforming?

Steam Methane Reforming is the most widely used process for bulk gas production, accounting for 95% of the hydrogen produced in the United States. The Steam Methane Reforming process can be broken down into five distinct steps: Water enters the furnace, producing steam at a very high temperature.

Is steam reforming a good method of hydrogen production?

Abstract Methane steam reforming (MSR) is the most common and cost-effective method for hydrogen production, and it contributes about 50% of the world’s hydrogen production. Although MSR is a mature technology, it suffers from significant disadvantages such as mass and heat transfer issues and coke deposition during the reaction.

What are the products of steam reforming?

Steam reforming is an exothermic reaction that is carried out by passing a preheated mixture comprising methane (sometimes substituted by natural gas having high methane content) and steam through catalyst filled tubes. The products of the process are a mixture of hydrogen, carbon monoxide, and carbon dioxide.

What happens when methane reacts with steam?

In SMR, 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 reaction is endothermic, i. e. heat must be supplied to the process for the reaction to proceed.