Biomass treatment for hydrothermal hydrocatalytic conversion

摘要

A selective removal of chlorine and phosphorus that are detrimental to subsequent hydrothermal hydrocatalytic conversion from the biomass feed prior to carrying out catalytic hydrogenation/hydrogenolysis/hydrodeoxygenation of the biomass in a manner that does not reduce the effectiveness of the hydrothermal hydrocatalytic treatment while minimizing the amount of water used in the process is provided.

主权项

1. A method for selective removal of chlorine and phosphorus from a cellulosic biomass solids, said method comprising a plurality of vessels:
a. providing each of said vessels with one of detrimental species-containing cellulosic biomass solids; b. introducing a first dispersed or semi-continuous liquid phase comprising a base solution having a pH of greater than 9 from an inlet into a first vessel of said plurality of vessels wherein the cellulosic biomass solids in the first vessel is contacted by said first dispersed or semi-continuous liquid phase and a first continuous gas phase at a at a temperature in the range of about 0° C. to about 60° C. wherein the flux of the first liquid phase is at least 1 kg/(m2s); c. repeating step (b) for a second vessel of said plurality of vessels; d. introducing a second dispersed or semi-continuous liquid phase comprising an aqueous solution having a pH of at most 8 from an inlet into said first vessel of said plurality of vessels treated according to step (b) wherein said base solution-treated cellulosic biomass solids in the first vessel is contacted by said second dispersed or semi-continuous liquid phase and second continuous gas phase wherein the flux of the second liquid phase is at least 1 kg/(m2 s) and discharging a basic water effluent; e. repeating step (d) for the second vessel of said plurality of vessels treated according to step (c); f. transferring at least a portion of the biomass treated according to steps (d) and (e) to a digestion and/or reaction vessel; g. wherein at least 2 of the vessels are undergoing at least one of the steps (b) through (f) at the same time; and h. wherein the amount of the total basic water effluent from plurality of vessels is in the range of from about 3 parts to about 0.5 parts relative to about 1 part of detrimental species—containing cellulosic biomass solids (dry basis).