Membrane Wall Gasification Reactor for Solvent Deasphalting Bottoms
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for disposing of solvent deasphalting process bottoms are costly and environmentally challenging, and current gasification processes are limited in their ability to efficiently convert these materials into synthesis gas, particularly when dealing with liquid fuels.
Innovation Solution
A process involving the partial oxidation of solvent deasphalting bottoms, including spent solid adsorbent material and asphalt, in a membrane wall gasification reactor to produce synthesis gas, with optional water-gas shift reaction to increase hydrogen content, integrated with electricity generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional disposal methods are used for solvent deasphalting process bottoms, then disposal is achieved, but cost is high and environmental impact is negative
Solution Approach 1:
The patent converts the harmful waste material (solvent deasphalting process bottoms) into a beneficial product (synthesis gas) through gasification. The waste feedstock containing spent adsorbent, asphalt, and process reject materials is partially oxidized in a gasification reactor to produce synthesis gas, which can be used as fuel or chemical feedstock, thereby eliminating disposal costs and environmental hazards while creating economic value.
2Productivity
If existing gasification processes are used, then some synthesis gas is produced, but conversion efficiency is limited especially for liquid fuels
Solution Approach 1:
The patent optimizes gasification parameters including temperature (800-1500°C), pressure (1-100 bar), oxygen-to-carbon ratio (0.25-1.0), and steam-to-carbon ratio (0.1-2.0) to maximize synthesis gas yield and conversion efficiency. These parameter adjustments enable efficient processing of liquid fuel feedstocks that conventional gasification processes struggle with, achieving high productivity and reliability simultaneously.
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
This process provides an economically viable and environmentally friendly method for disposing of solvent deasphalting process bottoms, producing synthesis gas and hydrogen for refinery use while generating electricity, thus addressing the limitations of existing disposal and gasification technologies.
Implementation Method 1
partial oxidation in a membrane wall gasification reactor of heavy bottoms that can also contain waste materials recovered from a solvent deasphalting unit operation to produce a high value synthesis gas
Implementation Method 2
subjecting the synthesis gas to a water-gas shift reaction to increase the total hydrogen produced
Data Source
AI summary
A cost-effective solution for the disposal of solvent deasphalting process bottoms that include spent solid adsorbent material containing ash-producing constituents, asphalt and process reject materials is provided by introducing them in the form of a flowable slurry into a membrane wall gasification reactor to produce a synthesis gas and, optionally, subjecting the synthesis gas to a water-gas shift reaction to produce a more hydrogen-rich product stream; process steam and electricity are produced by recovering the sensible heat values from the hot synthesis gas.