BTX Production from Heavy Hydrocarbons via Coking and Ring Opening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing processes for producing BTX from mixed hydrocarbon streams, such as coker gasoil, are not suitable for converting heavy hydrocarbon feedstreams effectively, resulting in low yields of high-value petrochemical products.
Innovation Solution
A process involving coking of a coker feedstream to produce coker naphtha and coker gasoil, followed by aromatic ring opening of coker gasoil in the presence of hydrogen using a catalyst, and subsequent recovery of BTX from coker naphtha, optimizing conditions to enhance BTX yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional hydrocracking/hydrodesulphurisation process is used to produce BTX from mixed hydrocarbon streams, then the process can handle lighter feedstocks, but it cannot effectively convert heavy hydrocarbon feedstreams like coker gasoil to BTX
Solution Approach 1:
The process segments the heavy hydrocarbon feedstream into different fractions through coking, separating coker gasoil (which is then converted to BTX via aromatic ring opening) from other products like coker naphtha and coke. This segmentation allows each fraction to be optimally processed for BTX production, resolving the contradiction between handling heavy feedstocks and achieving high BTX yields
Solution Approach 2:
The coking step is performed as a preliminary action before BTX production. This preliminary coking process prepares the heavy hydrocarbon feedstream by breaking it down into more manageable fractions, including coker gasoil that is suitable for subsequent aromatic ring opening to produce BTX, thereby enabling effective conversion of heavy feedstocks
2Quantity of substance
If heavy hydrocarbon feedstreams are directly processed for BTX production, then feedstock utilization is maximized, but the yield of high-value petrochemical products like BTX is low
Solution Approach 1:
The process changes the chemical parameters of the heavy hydrocarbon feedstream through coking and aromatic ring opening reactions. These parameter changes transform the molecular structure and composition of the feedstream, converting heavy hydrocarbons into lighter BTX molecules with higher value, thereby simultaneously achieving feedstream utilization and high BTX yield
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process significantly improves the yield of high-value petrochemical products like BTX by effectively converting heavy hydrocarbon feedstreams, specifically using coker gasoil, and allows for the use of various hydrocarbon compositions as feed, including resid and extra heavy crude oil.
Implementation Method 1
subjecting coker gasoil to aromatic ring opening to produce BTX
Implementation Method 2
aromatic ring opening of coker gasoil in the presence of hydrogen using a catalyst
Implementation Method 3
subjecting a coker feedstream comprising heavy hydrocarbons to coking to produce coker naphtha and coker gasoil
Data Source
AI summary
The present invention relates to a process for producing BTX comprising coking, aromatic ring opening and BTX recovery. Furthermore, the present invention relates to a process installation to convert a coker feedstream into BTX comprising a coker unit, an aromatic ring opening unit and a BTX recovery unit.