Syngas Produced By Plasma Gasification

Abstract

A syngas stream composition comprising on a dry basis up to about 50,000 mg/Nm 3 particulates; 5-39 vol % H 2 ; 5-39 vol % CO; 15-50 vol % CO 2 ; 8-30 vol % N 2 , 0-2 vol % Argon; and 15-50 vol % moisture on a wet basis. The stream includes a H 2 /CO ratio that is about 0.3-2 and at least 15 wt % of particulates have an aerodynamic particle diameter of less than or equal to 1 micron. A gasified waste stream and a method for forming a gasified waste stream are also disclosed.

1 . A method for forming a syngas stream comprising:
 providing a waste;   gasifying the waste in the presence of plasma under oxygen-fired conditions to form a syngas stream comprising on a dry basis:   up to about 50,000 mg/Nm3 particulates;   5-39 vol % H2;   5-39 vol % CO;   15-50 vol % CO2;   8-30 vol % N2;   0-2 vol % Argon;   and 15-50 vol % moisture on a wet basis; and   
       wherein the H2/CO ratio is about 0.3-2 and at least 15 wt % of the particulates have an aerodynamic particle diameter of less than or equal to 1 micron. 
     
     
         2 . The method of  claim 1 , further comprising gasifying waste selected from the group consisting of gasified MSW, gasified commercial waste, gasified construction and demolition waste, gasified industrial waste, gasified hazardous waste and combinations thereof. 
     
     
         3 . The method of  claim 2 , wherein in the MSW comprises 10-35 wt % paper and card, 5-15 wt % plastic, 2-7 wt % textiles, 2-12 wt % glass and metals, 15-30 wt % kitchen waste, 15-25 wt % biomass and 0-20 wt % other waste material. 
     
     
         4 . The method of  claim 2 , wherein the commercial waste comprises 20-70 wt % paper and card, 5-30 wt % plastic, 0-5 wt % textiles, 2-15 wt % glass and metals, 5-15 wt % organic waste and 15-25 wt % other biomass. 
     
     
         5 . The method of  claim 1 , wherein the composition comprises 10-35 vol % H2. 
     
     
         6 . The method of  claim 5 , wherein the composition comprises 15-39 vol % CO. 
     
     
         7 . The method of  claim 6 , wherein the composition more comprises 15-40 vol % CO2. 
     
     
         8 . The method of  claim 7 , wherein the composition comprises 8-15 vol % N2. 
     
     
         9 . The method of  claim 8 , wherein the stream comprises 5,000 to 29,500 g/Nm3 or 30,500 to 50,000 g/Nm3 particulates. 
     
     
         10 . The method of  claim 1 , further comprising 1000-5000 ppm HCl and 1000-5000 ppm NH3. 
     
     
         11 . The method of  claim 1 , wherein at least 30 wt % of the particulates have an aerodynamic particle diameter of less than or equal to 1 micron. 
     
     
         12 . The method of  claim 1 , wherein at least 50 wt % of the particulates have an aerodynamic particle diameter of less than or equal to 1 micron 
     
     
         13 . A method for forming a syngas stream comprising:
 providing a waste;   gasifying the waste in the presence of plasma under oxygen-fired conditions to form a syngas stream comprising on a dry basis:   up to about 50,000 mg/Nm3 particulates;   5-39 vol % H2;   5-39 vol % CO;   15-50 vol % CO2;   10-60 vol % N2;   0-2 vol % Argon;   and 15-50 vol % moisture on a wet basis; and   wherein the H2/CO ratio is about 0.3-2 and at least 15 wt % of the particulates have an aerodynamic particle diameter of less than or equal to 1 micron.