Patent ID: 11898275
Assignee: nan
Field: Biotechnology (Chemistry)
Classification: CPC C  D  Y | IPC C  D

Claim 0:
1. A process of producing polyacrylonitrile-based carbon fibers comprising a combination of two or more of the following steps:
a) producing algae biomass by utilizing sequestered or natural CO2;
separating polyacrylonitrile triglycerides from said algae biomass;
splitting said triglycerides into glycerol and algae oil/lipids;
converting said glycerol into methanol using a glycerol to methanol process;
converting said methanol into propylene via a methanol to propylene process;
producing acrylonitrile from said propylene via an acrylonitrile-synthesis process; and,
obtaining polyacrylonitrile from said acrylonitrile via a polyacrylonitrile-fiber production process;

b) producing biomass by utilizing sequestered or natural CO2; liquefaction of said biomass and methanol synthesis via a biomass to liquid process with conversion into methanol;
converting said methanol produced from step “b)” into propylene via a methanol to propylene process;
producing acrylonitrile from said propylene via an acrylonitrile-synthesis process; and,
obtaining polyacrylonitrile from said acrylonitrile via a polyacrylonitrile-fiber production process;

c) producing biomass by utilizing sequestered or natural CO2;
separating triglycerides from said biomass;
splitting said triglycerides into glycerol and oil/lipids;
converting said glycerol into methanol using a glycerol to methanol process as a first source of methanol;
converting said oil/lipids into methanol as a second source of methanol through esterification of said oil/lipids and an auto-thermal reforming process of the esterification product into synthesis gas and its conversion via methanol synthesis into methanol;
converting the methanol from both the first source and the second source into propylene via a methanol to propylene process;
producing acrylonitrile from said propylene via an acrylonitrile-synthesis process; and,
obtaining polyacrylonitrile from said acrylonitrile via a polyacrylonitrile-fiber production process;

d) producing methanol from CO2 reforming by a reverse water-gas shift reaction and a Fischer-Tropsch synthesis utilizing H2, by conversion of CO2 and H2 into methanol;
converting said methanol produced from step “d)” into propene or propylene via a methanol to propylene process;
producing acrylonitrile from said propene via an acrylonitrile-synthesis process; and,
obtaining polyacrylonitrile from said acrylonitrile via a polyacrylonitrile-fiber production process,

said processes a), b), c) and d) further comprising:
e) obtaining the CO2 required for the polyacrylonitrile-fiber production process from at least one of: (i) flue gases from fossil power plants, (ii) process-related CO2 emissions from production of steel, cement or aluminum, (iii) natural sources;
f) obtaining the CO2 required for the polyacrylonitrile-fiber production process from flue gases of regenerative biodiesel power plants;
g) obtaining the CO2 required for the polyacrylonitrile-fiber production process from flue gases of natural biomass that has previously been generating electricity;
h) obtaining the CO2 for the algae oil production from ambient air.