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首页> 外文期刊>Catalysis science & technology >From cellulose to 1,2,4-benzenetriol via catalytic degradation over a wood-based activated carbon catalyst
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From cellulose to 1,2,4-benzenetriol via catalytic degradation over a wood-based activated carbon catalyst

机译：从纤维素1 2 4-benzenetriol通过催化降解木质活性炭催化剂

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Spherical P-doped activated carbon (CSP) was obtained from poplar bark by microwave carbonization with phosphoric acid as the dopant and activating agent. Phosphorus bonded with four oxygen atoms to form a phosphate-like structure rather than directly bonding with C atoms in CSP; such groups can provide Lewis acid active sites with moderately strong acidity. The Lewis acid and total acid content increased with increasing phosphoric acid doping ratio. The use of phosphoric acid as an activating agent promotes the formation of a developed porous structure. CSP1 (mass ratio of raw material to acid = 1 : 1) had a specific surface area of 1115 m(2) g(-1) with developed micro-mesoporous structures, mainly micropores. Investigation of the activity of CSP in catalytic cellulose hydrolysis during hydrothermal degradation showed that Bronsted acid sites promote hydrolysis and dehydration of cellulose, Lewis acid sites promote subsequent reactions such as isomerization, rearrangement, and oligomerization, and the developed pores can provide reaction sites and facilitate reactant transportation. The optimal reaction conditions, i.e., 1 h at 230 degrees C and 1 MPa with CSP1 (0.4 g) as the catalyst, gave a cellulose conversion of >99.9%, with 42.30% selectivity for 1,2,4-benzenetriol. This study provides an effective method for preparing 1,2,4-benzenetriol from cellulose with biomass-based activated carbon as the catalyst, which enables green synthesis of 1,2,4-benzenetriol and promotes the use of biomass waste resources.
机译：球形p型活性炭(CSP)通过微波从杨树树皮碳化与磷酸掺杂剂和活化剂。氧原子形成phosphate-like结构而不是直接在CSP和C原子成键;这样的群体可以提供路易斯酸活跃的网站强酸性。和总酸含量增加而增加磷酸掺杂比例。磷酸作为激活剂促进开发的多孔结构的形成。CSP1(质量比原料酸= 1:1)有一个特定的表面面积1115 m (2) g (1)与发达micro-mesoporous结构,主要作用。CSP在催化纤维素水解水热降解显示,布仑斯惕酸促进水解和脱水的网站纤维素,路易斯酸促进后续的网站异构化等反应,重排,和寡聚化,毛孔可以开发的提供网站和促进反应物的反应交通工具。例如,1 h与CSP1 230摄氏度和1 MPa(0.4克)作为催化剂,纤维素> 99.9%的转化率,选择性为42.30%1、2、4-benzenetriol。有效的方法准备1、2,4-benzenetriol从纤维素再激活碳作为催化剂,使绿色合成的1、2、4-benzenetriol和促进利用生物质废弃物资源。

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