What is naphtha hydrotreating?
Naphtha hydrotreating (NHT) is one of the critical processes in a crude oil refinery. It removes sulphur and nitrogen compounds from naphtha to avoid poisoning of catalysts in downstream isomerization and reforming processes.
What is the hydrotreating process?
Hydrogen processes, commonly known as hydrotreating, are the most common processes for removing sulfur and nitrogen impurities. The oil is combined with high-purity hydrogen, vapourized, and then passed over a catalyst such as tungsten, nickel, or a mixture of cobalt and molybdenum oxides supported on an alumina base.
What is hydrotreating process in petroleum refinery?
Hydrotreating is the reaction of organic compounds in the presence of high pressure hydrogen to remove oxygen (deoxygenation) along with other heteroatoms (nitrogen, sulfur, and chlorine).
How does a naphtha hydrotreater work?
The naphtha hydrotreating unit uses a cobalt-molybdenum catalyst to remove sulfur by converting it to hydrogen sulfide that is removed along with unreacted hydrogen. Some of the hydrogen sulphide-hydrogen mixture is recycled back to the reactor to utilize the unreacted hydrogen, using a compressor.
What is hydrotreating catalyst?
Hydrotreating catalysts are primarily used to remove sulfur, nitrogen and other contaminants from refinery feedstocks. In addition, they improve product properties by adding hydrogen and in some cases improve the performance of downstream catalysts and processes.
What is distillate hydrotreating?
The distillate hydrotreater is a category of hydrotreaters that treats distillate streams from atmospheric distillation and from conversion units to reduce their sulfur content and to improve their properties for blending into diesel.
What is catalytic hydrotreating?
Catalytic hydrotreating: A refining process for treating petroleum fractions from atmospheric or vacuum distillation units (e.g., naphthas, middle distillates, reformer feeds, residual fuel oil, and heavy gas oil) and other petroleum (e.g., cat cracked naphtha,coker naphtha, gas oil, etc.)
Why do we need hydrotreating?
The purpose of a hydrotreater unit is primarily to remove sulfur and other contaminants from intermediate streams before blending into a finished refined product or before being fed into another refinery process unit.
What is the main purpose of hydrotreating?
Which reactor is mostly used in hydrotreating process?
A three-phase ebullated bed reactor used for hydrotreating consists of a liquid phase containing the petroleum reactants, an inlet gas phase of hydrogen with an outlet gas phase that contains the clean, lower molecular weight organic products, and the solid phase catalysts.
What is the need of hydrotreating?
Where is naphtha from?
Naphtha (/ˈnæpθə/ or /ˈnæfθə/) is a flammable liquid hydrocarbon mixture. Mixtures labelled naphtha have been produced from natural gas condensates, petroleum distillates, and the distillation of coal tar and peat. In different industries and regions naphtha may also be crude oil or refined products such as kerosene.