BIOMASS TREATMENT FOR HYDROTHERMAL HYDROCATALYTIC CONVERSION

摘要

A selective removal of metal and its anion species 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 detrimental metals and their anion species 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 quantity of an acidic solution having a pH of at most 4 from an inlet into a first vessel of said plurality of vessels containing said detrimental species-containing cellulosic biomass solids at a temperature in the range of about 0° C. to about 60° C.; c. repeating step (b) for a second vessel of said plurality of vessels; d. introducing a quantity of aqueous solution having a pH of at least 5 from an inlet into said first vessel of said plurality of vessels treated according to step (b) thereby discharging the acidic water effluent; e. repeating step (d) for the second vessel of said plurality of vessels treated according to step (c); f. introducing a quantity of a base solution having a pH of greater than 9 from an inlet into said first vessel of said plurality of vessels treated according to step (d) at a temperature in the range of about 0° C. to about 60° C.; g. repeating step (f) for a second vessel of said plurality of vessels; h. introducing a quantity of 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 (f) thereby discharging the basic water effluent; i. repeating step (h) for the second vessel of said plurality of vessels treated according to step (g); j. introducing a quantity of gas or organic solution from an inlet into the first vessel of said plurality of vessels treated according to step h) and discharging the aqueous solution; k. repeating step (f) for the second vessel of said plurality of vessels treated according to step (e); l. recycling at least a portion of the discharged aqueous solution as a portion of the acidic solution or base solution; m. transferring at least a portion of the biomass treated according to steps (j) and (k) to a digestion and/or reaction vessel; n. wherein at least 2 of the vessels are undergoing at least one of the steps (b) through (m) at the same time; and o. wherein the amount of the total discharged acidic water effluent and basic water effluent from the 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).