Process for preparing liquefied propane gas and gasoline with high octane value from plant fibres

Abstract

A process for preparing liquefied propane gas and gasoline with high octane value includes vacuum dry distilling-cracking reaction of plant fibres (corn stalk, rice straw, reed, etc) to generate the gas mixture of CO and propane, pressure-swing adsorption to separate CO from said gas mixture, generating and purifying hydrogen gas, recovering CO2, preparing liquefied propane gas, synthesizing methanol from resultant CO, CO2 and H2, and preparing gasoline. Its advantages are high purity and low cost.

Description

Technical field: [0001] The invention discloses a method for preparing propane liquefied gas and high-octane gasoline by utilizing plant fibers, and relates to the technical field of converting plant fibers into hydrocarbon fuels. Background technique: [0002] In my country, the use of dry distillation to produce civil combustible gas from plant fibers (such as corn stalks, straw, reeds, etc.) through dry distillation kettles has been applied. Due to the chemical reaction under normal pressure, the generated combustible gas components are relatively complex. for CO, CO 2 , nitrogen, hydrogen, methane and other gases, but there is no propane component, although the calorific value of methane is 39.819MJ / m 3 , but with propane calorific value (101.242MJ / m 3 ) is very different, and the mixed gas also contains about 10% inert nitrogen, which seriously affects the combustion quality of combustible gas; [0003] In the world, the fermentation method is used to make methanol fr...

AI Technical Summary

Problems solved by technology

Brazil SaSOI Company in South Africa uses sugarcane as raw material to generate methanol and then applies MTG method to produce gasoline. The above-mentioned process is complicated and costly, and cannot be widely used in practice.