id	keyword
brj-23353	pulp
brj-23353	cooking
brj-23353	paper
brj-23353	lignin
brj-23353	cyclic
brj-23353	method
brj-23353	yield
brj-23353	et al
brj-23353	cellulose
brj-23353	pulping
brj-23353	doi
brj-23353	wang
brj-23353	china