A composition, method and applications thereof

Abstract

The instant disclosure relates to a composition comprising potassium carbonate and calcium acetate, optionally along with sulfur containing compound. The composition of the present disclosure reduces coke formation during hydrocarbon cracking, particularly reduces surface coke and spalled coke during hydrocarbon cracking when compared to hydrocarbon cracking without the said composition. The disclosure further relates to a method for reducing formation and/or deposition of coke during pyrolysis or cracking of hydrocarbons.

We claim: 
     
         1 . A composition comprising alkali metal salt and alkaline metal salt, optionally along with sulfur containing compound, wherein the composition reduces coke formation during hydrocarbon cracking. 
     
     
         2 . The composition as claimed in  claim 1 , wherein the alkali metal salt is potassium carbonate and alkaline earth metal salt is calcium acetate; wherein the concentration of the potassium carbonate and the calcium acetate is ranging from about 1 ppmw to 4 ppmw; and wherein in the said concentration, the potassium carbonate is about 35 wt % and the calcium acetate is about 65 wt %. 
     
     
         3 . The composition as claimed in  claim 1 , wherein the sulfur containing compound is selected from a group comprising dimethyl disulfide, dimethyl sulfide, diethyl sulfide, diethyl disulfide carbon disulfide and dimethyl sulfoxide, or any combination thereof, and concentration of the sulfur containing compound is ranging from about 50 ppmw to 250 ppmw. 
     
     
         4 . The composition as claimed in  claim 1 , wherein the composition is soluble in water and polar solvent, independently. 
     
     
         5 . The composition as claimed in  claim 1 , wherein the composition reduces coke formation by at least 40% during hydrocarbon cracking when compared to the hydrocarbon cracking without the composition; wherein the composition reduces surface coke by at least 60% during hydrocarbon cracking when compared to the hydrocarbon cracking without the composition; and wherein the composition reduces spalled coke by at least 35% during hydrocarbon cracking when compared to the hydrocarbon cracking without the composition. 
     
     
         6 . The composition as claimed in  claim 1 , wherein the composition further reduces coke formation by memory effect of the composition during hydrocarbon cracking, wherein the memory effect of the composition is retained for at least two cycles of the hydrocarbon cracking; and wherein the surface coke is reduced by at least 50% and the spalled coke is reduced by at least 25%, individually in subsequent cycles during the hydrocarbon cracking when compared to the hydrocarbon cracking without the composition. 
     
     
         7 . The composition as claimed in  claim 1 , wherein the composition reduces metal leaching by at least 40% during hydrocarbon cracking when compared to the hydrocarbon cracking without the composition. 
     
     
         8 . A method for reducing coke formation during hydrocarbon cracking, said method comprises step of introducing a composition comprising potassium carbonate and calcium acetate, optionally along with sulfur containing compound in to a reactor system and subjecting the reactor system to hydrocarbon cracking. 
     
     
         9 . The method as claimed in  claim 8 , wherein the composition is introduced into the reactor system along with water or hydrocarbon or both; wherein the hydrocarbon is selected from a group comprising naphtha, gas oil, ethane and propane, or any combination thereof; and wherein the reactor system is cracker reactor. 
     
     
         10 . The method as claimed in  claim 8 , wherein concentration of the potassium carbonate and the calcium acetate is ranging from about 1 ppmw to 4 ppmw, in the said concentration, the potassium carbonate is about 35 wt % and the calcium acetate is about 65 wt %. 
     
     
         11 . The method as claimed in claimed  8 , wherein the sulfur containing compound is selected from a group comprising dimethyl disulfide, dimethyl sulfide, diethyl sulfide, diethyl disulfide carbon disulfide and dimethyl sulfoxide, or any combination thereof, and concentration of the sulfur containing compound is ranging from about 50 ppmw to 250 ppmw. 
     
     
         12 . The method as claimed in  claim 8 , wherein the hydrocarbon cracking is carried at a temperature ranging from about 800° C. to 850° C. 
     
     
         13 . The method as claimed in  claim 8 , wherein coke formation during the hydrocarbon cracking is reduced by at least 40%, wherein surface coke during the hydrocarbon cracking is reduced by 60%; and wherein spalled coke during the hydrocarbon cracking is reduced by at least 35%.