What is the primary purpose of catalytic reforming in petroleum refining?
A
To remove sulfur from fuels
B
To increase octane number of gasoline
C
To convert gasoline into diesel
D
To separate crude oil into fractions
Analysis & Theory
Catalytic reforming is used to convert low-octane naphtha into high-octane gasoline components.
Which of the following is a common catalyst used in catalytic reforming?
B
Platinum-based catalyst
Analysis & Theory
Platinum-based catalysts (often on alumina support) are commonly used due to their high activity and selectivity.
What is the typical feedstock for catalytic reforming?
Analysis & Theory
Straight-run naphtha (a light distillate) is used as the feedstock for reforming to improve octane rating.
Which type of chemical reaction is *not* involved in catalytic reforming?
Analysis & Theory
Catalytic reforming involves dehydrogenation, isomerization, and cyclization but *not* cracking.
Which compound is commonly produced during catalytic reforming and used as a high-octane component?
Analysis & Theory
Benzene, a high-octane aromatic compound, is a typical product of catalytic reforming.
Which of the following is a valuable by-product of catalytic reforming?
Analysis & Theory
Hydrogen gas is a useful by-product, especially for hydrotreating and hydrocracking units.
Which condition is essential in catalytic reforming?
A
High pressure and low temperature
B
Low pressure and high temperature
C
High pressure and high temperature
D
Low pressure and low temperature
Analysis & Theory
Catalytic reforming is carried out at high temperatures (around 500°C) and moderate-to-high pressure (5–45 atm).
What is the main objective of reforming in terms of fuel quality?
Analysis & Theory
The key purpose is to increase the octane number of gasoline to improve its combustion quality in engines.
The reaction that converts naphthenes to aromatics in reforming is:
Analysis & Theory
Dehydrocyclization is the process where naphthenes (cycloalkanes) are converted into aromatics, releasing hydrogen.
Which of the following is *not* a benefit of catalytic reforming?
A
Production of high-octane gasoline
B
Production of hydrogen gas
C
Reduction in sulfur content
D
Production of aromatics for petrochemicals
Analysis & Theory
Catalytic reforming does not remove sulfur; this is done in a separate hydrodesulfurization (HDS) unit.