相关实验视频

Updated: Jul 26, 2025

Transformation of Organic Household Leftovers into a Peat Substitute

Transformation of Organic Household Leftovers into a Peat Substitute

Published on: July 9, 2019

在酸生产后回收的酸转化为活性碳吸附剂

Domenico Licursi¹, Claudia Antonetti¹, Nicola Di Fidio¹

¹Dipartimento di Chimica e Chimica Industriale - Università di Pisa, Via Giuseppe Moruzzi 13, 56124 Pisa, Italy; Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC), Via Celso Ulpiani 27, 70126 Bari, Italy.

Waste management (New York, N.Y.)

|June 15, 2023

概括

这项研究将来自酸生产的废水炭转化为活性炭. 这些材料对吸附二氧化碳和甲基蓝具有出色的性能,从而关闭了生物炼油循环.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
环境科学环境科学

背景情况:

从林氏纤维素生物质中生产levulinic酸会产生碳废物.
目前的方法将炭视为废物,限制了生物炼油厂的效率.
提升碳化合物的价值对于可持续的生物质转化至关重要.

研究的目的:

为了从酸生产废弃物中合成活性炭.
为了研究级联热解和化学激活 (H3PO4,KOH) 对电特性的影响.
评估合成的活性炭对二氧化碳和甲基蓝色吸附的潜力.

主要方法:

在levulinic 酸生产过程中回收水合物.
碳化合物的级联热解.
使用酸 (H3PO4) 或氧化 (KOH) 的化学激活.
表面特性 (特定表面积,孔径体积) 的表征.
对二氧化碳和甲基蓝的吸附性研究.

主要成果:

单纯的热解改善了酸盐表面的性能 (SSA: 388 m2/g).
烧化炭的KOH激活产生了优异的结果 (SSA: 1421 m2/g,Vp: 0.63 cm3/g).
活性炭显示出显著的吸附能力:二氧化碳 (~90 mg/g) 和甲蓝 (~248 mg/g).
子的直接H3PO4激活产生了高的SSA (1918 m2/g),但绕过了酸的产生.

结论:

来自酸生产的废水炭可以有效地转化为有价值的活性炭.
通过KOH激活的酸盐对二氧化碳和甲基烯蓝色吸附具有很好的性能.
这种方法通过提升废物流的价值来提高生物炼油厂的可持续性.
这项研究展示了一种智能方法,以关闭花贝生物炼油循环,用于环境应用.

关键词:

活性炭是一种活性炭.子贝子贝子贝炭化水化合物是一种碳化水化合物.水热处理是水热处理的过程.勒武林酸是一种酸.

更多相关视频

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Published on: May 19, 2019

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis

Published on: February 12, 2019

相关概念视频

Acid Halides to Carboxylic Acids: Hydrolysis

Acid Halides to Carboxylic Acids: Hydrolysis

Hydrolysis of acid halides is a nucleophilic acyl substitution reaction in which acid halides react with water to give carboxylic acids. The reaction occurs readily and does not require acid or a base catalyst.
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen π bond along with the departure of a halide ion. A final proton transfer step yields carboxylic...

Carboxylic Acids to Primary Alcohols: Hydride Reduction

Carboxylic Acids to Primary Alcohols: Hydride Reduction

Carboxylic acids, upon reaction with strong reducing agents such as lithium aluminum hydride followed by hydrolysis, undergo reduction to form primary alcohols.

Preparation of Carboxylic Acids: Hydrolysis of Nitriles

Preparation of Carboxylic Acids: Hydrolysis of Nitriles

Nitriles (R–CN) can be converted into carboxylic acids (R–COOH) upon treatment with aqueous acids, i.e., upon hydrolysis of nitriles. Under base-catalyzed conditions, carboxylate anions (R–COO−) are formed.

Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis

Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis

Hydrolysis of esters under acidic conditions proceeds through a nucleophilic acyl substitution. In the presence of excess water, the reaction proceeds in a reversible manner, forming carboxylic acids and alcohols.
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...