【Q&A Question 016】2018.01.16

Gaseous hydrocarbons and liquid hydrocarbons. (1) Gaseous hydrocarbons include natural gas, liquefied petroleum gas, and various refinery gases ； (2) Liquid hydrocarbons include straight-run naphtha, stripped oil, tail oil, and recycled oil

Gaseous hydrocarbons include natural gas, liquefied petroleum gas, and various refinery gases； Liquid hydrocarbons include straight-run naphtha, extract oil, raffinate oil, and reprocessed oil

Hydrocarbon feedstocks suitable for steam reforming are generally divided into gaseous hydrocarbons and liquid hydrocarbons. (1) Gaseous hydrocarbons include natural gas, liquefied petroleum gas, and various refinery gases. Natural gas generally includes associated gas from oil fields and gas field gas. The main component of natural gas is methane, along with small amounts of lower hydrocarbons such as ethane and propane. It also contains certain amounts of inert gases like nitrogen and carbon dioxide, as well as harmful impurities such as hydrogen sulfide. The natural gas from these gas fields is primarily methane, with trace impurities. Liquefied petroleum gas is a hydrocarbon composed mainly of propane and butane. It has two sources: one is natural liquefied gas that is produced alongside oil fields and natural gas fields, and the other is liquefied petroleum gas generated by refineries and petrochemical plants. Refinery gas refers to various off-gases produced as by-products during crude oil processing, including catalytic cracking gas, coking dry gas, catalytic reforming gas, thermal cracking gas, and high-pressure hydrocracking off-gases. The composition of various refinery gases varies greatly; those containing olefins are not suitable for direct use in steam reforming to produce hydrogen. However, after thorough olefin removal or hydrodesaturation, it can serve as an excellent feedstock for steam reforming to produce hydrogen, just like hydrogen-rich dry gas free of olefins. (2) Liquid hydrocarbons include straight-run naphtha, drained oil, tail oil, and secondary processed oils. Straight-run naphtha is the fraction obtained from the atmospheric distillation of crude oil at temperatures below 210°C. The specific gravity is generally 0.63 to 0.77, the sulfur content is less than 0.05%, the paraffin hydrocarbon content is high, the aromatic hydrocarbon content is less than 13%, and the olefin content is less than 1%. The distillate oil used as a raw material for hydrogen production is generally reformation distillate oil, that is, the residue remaining after the extraction of aromatics through reformation. The dry point of the raffinate oil is generally between 130 and 150°C, with very low aromatic content. Tail oil is usually reformed tail oil, generally consisting of hydrocarbons below C5. Secondary processed oil refers to light oil obtained from heavy oil through a series of secondary processing treatments such as cracking, coking, and viscosity reduction. This type of light oil generally cannot be used directly as a raw material for hydrogen production. However, after hydrogenation, such oils contain no olefins, have a dry point of less than 100°C, and a low specific gravity; they can be blended with straight-run light oil as a feedstock for hydrogen production or used alone as such a feedstock, but experimental evaluation is generally required to determine this

Hydrocarbon feedstocks suitable for steam reforming are generally divided into gaseous hydrocarbons and liquid hydrocarbons. (1) Gaseous hydrocarbons include natural gas, liquefied petroleum gas, and various refinery gases. (2) Liquid hydrocarbons include straight-run naphtha, extract oil, raffinate oil, and reprocessed oil.

It is divided into gaseous hydrocarbons and liquid hydrocarbons. (1) Gaseous hydrocarbons include natural gas, liquefied petroleum gas, and various refinery gases. (2) Liquid hydrocarbons include straight-run naphtha, extracted oil, raffinate oil, and secondary processed oil

Gaseous hydrocarbons and liquid hydrocarbons. (1) Gaseous hydrocarbons include natural gas, liquefied petroleum gas, and various refinery gases ； (2) Liquid hydrocarbons include straight-run naphtha, stripped oil, tail oil, and recycled oil

Hydrocarbon feedstocks suitable for steam reforming are generally divided into gaseous hydrocarbons and liquid hydrocarbons.

What are the hydrocarbon feedstocks suitable for steam reforming to produce hydrogen? Answer: Hydrocarbon feedstocks suitable for steam reforming are generally divided into gaseous hydrocarbons and liquid hydrocarbons. (1) Gaseous hydrocarbons include natural gas, liquefied petroleum gas, and various refinery gases. (2) Liquid hydrocarbons include straight-run naphtha, extract oil, raffinate oil, and reprocessed oil.

Answer: Hydrocarbon feedstocks suitable for steam reforming are generally divided into gaseous hydrocarbons and liquid hydrocarbons.