Gasification of densified textiles and solid fossil fuels to produce organic compounds
AssigneeEastman Chemical Company
InventorsWilliam Lewis Trapp, Justin William Murphy, Nathan Mitchell West
Life of this patent
Estimating the term…
Abstract
Densified textile aggregates are co-fed with a fuel into a partial oxidation gasifier. High solids concentrations in the feedstock composition can be obtained without significant impact on the feedstock composition stability and pumpability. A consistent quality of syngas can be continuously produced, including generation of carbon dioxide and a carbon monoxide/hydrogen ratio while stably operating the gasifier and avoiding the high tar generation of fluidized bed or fixed bed waste gasifiers and without impacting the operations of the gasifier. The syngas quality, composition, and throughput are suitable for produce a wide range of chemicals.
Claims12
A process for the production of syngas comprising:
- a. charging an oxidant and a feedstock composition to a gasification zone within a gasifier, said feedstock composition comprising a solid fossil fuel and less than 5 wt. % densified textiles based on the weights of solids in the feedstock composition;
- b. gasifying the feedstock composition together with the oxidant in a gasification zone to produce a syngas composition;
- and
- c. discharging at least a portion of the syngas composition from the gasifier;
- and producing an organic compound from said syngas composition;
- wherein the gasifier is an entrained flow gasifier;
- wherein the feedstock composition comprises densified textiles, a solid fossil fuel, and water, wherein the densified textiles have a particle size of not more than 2 mm, and the solid fossil fuel in the feedstock composition has a particle size of less than 2 mm, the solids content in the feedstock composition is at least 62 wt. %, the amount of densified textiles present in the feedstock composition is 0.1 wt. % to less than 5 wt. % based on the weight of all solids, and the water is at least 20 wt. % based on the weight of the feedstock composition;
- and
- wherein the feedstock composition is stable as determined by having an initial viscosity of 100,000 cP or less at 5 minutes, or 10 minutes, or 15 minutes, or 20 minutes, or 25 minutes, or even for 30 minutes using a Brookfield R/S Rheometer equipped with V80-40 vane operating at a shear rate of 1.83/s or a Brookfield viscometer with an LV-2 spindle rotating at a rate of 0.5 rpm, measured at ambient conditions;
- and
- wherein the feedstock composition is pumpable as determined by having a viscosity of less than 30,000 cP after mixing to obtain a homogeneous distribution of solids throughout the slurry and using a Brookfield R/S Rheometer equipped with V80-40 vane operating at a shear rate of 1.83/s or a Brookfield viscometer with an LV-2 spindle rotating at a rate of 0.5 rpm, measured at ambient conditions.
Dependencies are inferred from the claim text.