Lignocellulosic biomass fermentation process co-product fuel for cement kiln

Abstract

A fuel made from co-products derived from a lignocellulosic biomass fermentation process is used to fuel a cement production process. Filter cake and syrup co-products are mixed and dried, then burned in a cement kiln to create the temperatures needed for cement production.

What is claimed is: 
     
         1 . A cement composition comprising ash from burned material selected from the group consisting of filter cake and syrup fuel, filter cake, syrup, and mixtures thereof. 
     
     
         2 . A concrete composition comprising ash from burned material selected from the group consisting of filter cake and syrup fuel, filter cake, syrup, and mixtures thereof. 
     
     
         3 . The cement composition of  claim 1  wherein the filter cake and syrup fuel, the filter cake, and the syrup are all lignocellulosic comprising both lignin and cellulose. 
     
     
         4 . The cement composition of  claim 1  wherein the filter cake comprises:
 is a) from about 35% to about 65% moisture; 
 b) from about 20% to about 75% volatiles; 
 c) from about 35% to about 65% solids; 
 d) from about 1% to about 30% ash content; and 
 e) from about 5% to about 20% fixed carbon; 
 wherein the filter cake has an energy value of about 2,000 to about 9,000 BTU/lb. 
 
     
     
         5 . The cement composition of  claim 1  wherein the syrup comprises:
 a) from about 40% to about 70% solids; 
 b) from about 10 g/l to about 30 g/l of acetamide; and 
 c) at least about 40 g/l of sugars; 
 wherein the syrup has a density of about 1 to about 2 g/cm 3  and a viscosity of less than 500 SSU at 100° F. (38° C.). 
 
     
     
         6 . The cement composition of  claim 1  wherein the syrup comprises at least about 5 g/l of ammonia. 
     
     
         7 . The cement composition of  claim 1  wherein the filter cake and syrup fuel, the filter cake, and the syrup have a moisture content of between 8% and 20%. 
     
     
         8 . The cement composition of  claim 1  further comprising burned cement raw material selected from the group consisting of limestone, clay, shale, sand, bauxite, iron ore, fly ash, slag, and combinations thereof. 
     
     
         9 . The cement composition of  claim 8  wherein the cement raw material is limestone. 
     
     
         10 . The concrete composition of  claim 2  wherein the filter cake and syrup fuel, the filter cake, and the syrup are all lignocellulosic comprising both lignin and cellulose. 
     
     
         11 . The concrete composition of  claim 2  wherein the filter cake comprises:
 a) from about 35% to about 65% moisture; 
 b) from about 20% to about 75% volatiles; 
 c) from about 35% to about 65% solids; 
 d) from about 1% to about 30% ash content; and 
 e) from about 5% to about 20% fixed carbon; 
 wherein the filter cake has an energy value of about 2,000 to about 9,000 BTU/lb. 
 
     
     
         12 . The concrete composition of  claim 2  wherein the syrup comprises:
 a) from about 40% to about 70% solids; 
 b) from about 10 g/l to about 30 g/l of acetamide; and 
 c) at least about 40 g/l of sugars; 
 wherein the syrup has a density of about 1 to about 2 g/cm 3  and a viscosity of less than 500 SSU at 100° F. (38° C.). 
 
     
     
         13 . The concrete composition of  claim 2  wherein the syrup comprises at least about 5 g/l of ammonia. 
     
     
         14 . The concrete composition of  claim 2  wherein the filter cake and syrup fuel, the filter cake, and the syrup have a moisture content of between 8% and 20%.