第五章单元测试
The traditional techniques of solvent extraction of plant materials are mostly based on the correct choice of solvents and the use of heat or/and agitation to increase the solubility of the desired compounds and improve the mass transfer.
They spray the rubber cubes with a mix of calcium carbonate and solvent the mixture forms the film on the cubes that prevents mold and keeps them from sticking together during transport.
Biomass is mostly made up of carbon, hydrogen, compounds did not burn called ash.
Biochemical approaches include three unit-operations namely, pretreatment, hydrolysis, and distillation.
Furfural can be produced by a one-step or a two-step process. The advantage of the one-step process is that a higher quantity of furfural is produced when compared to the two-step process.
A worm screw supply the mixture to a press roll, a constant spray of water keeps the mixture from sticking to it.
Chemical activation is usually carried out at lower temperatures (from 400 to 700℃) with activating agents like phosphoric acid, potassium hydroxide, sodium hydroxide and zinc chloride.
Generally, the cellulosic cell wall from nearly any plant or trees can be used for pulp.
When the paper is dry it may be treated with stabilizing materials and surface finishes to improve durability or printability.
A:错 B:对
答案:对
A:错 B:对
A:错 B:对
A:错 B:对
A:对 B:错
A:错 B:对
A:错 B:对
A:错 B:对
A:对 B:错
