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Related Concept Videos

Production of Organic Acids01:25

Production of Organic Acids

Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis01:13

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...
Biofuels01:25

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Overview01:20

Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Overview

The Fischer esterification reaction was developed by the German chemist Emil Fischer in 1895. It is a condensation reaction between carboxylic acids and alcohols in an acidic medium to give esters and water.
Fates of Pyruvate01:20

Fates of Pyruvate

Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Mechanism01:13

Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Mechanism

Carboxylic acids react with alcohols to yield esters via an acid-catalyzed condensation reaction called Fischer esterification. This is a nucleophilic acyl substitution reaction that proceeds via a tetrahedral intermediate, where a water molecule is eliminated as the leaving group.

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Related Experiment Video

Updated: Jun 7, 2026

A Novel Method for the Pentosan Analysis Present in Jute Biomass and Its Conversion into Sugar Monomers Using Acidic Ionic Liquid
08:09

A Novel Method for the Pentosan Analysis Present in Jute Biomass and Its Conversion into Sugar Monomers Using Acidic Ionic Liquid

Published on: June 1, 2018

Conversion of biomass into 5-hydroxymethylfurfural using solid acid catalyst.

Fengli Yang1, Qishun Liu, Xuefang Bai

  • 1Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, CAS, Dalian, PR China.

Bioresource Technology
|November 2, 2010
PubMed
Summary
This summary is machine-generated.

This study efficiently converts carbohydrates like fructose and inulin into 5-Hydroxymethylfurfural (HMF) using a solid acid catalyst. This green chemistry approach offers a sustainable route to valuable platform chemicals and biofuels.

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A Novel Method for the Pentosan Analysis Present in Jute Biomass and Its Conversion into Sugar Monomers Using Acidic Ionic Liquid
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Area of Science:

  • Green Chemistry
  • Catalysis
  • Biomass Conversion

Background:

  • 5-Hydroxymethylfurfural (HMF) is a key platform chemical derived from biomass.
  • Efficient and sustainable methods for HMF production are crucial for biofuel and chemical industries.

Purpose of the Study:

  • To develop a simple, one-pot method for producing HMF from various carbohydrate sources.
  • To investigate the catalytic activity of hydrated niobium pentoxide for HMF synthesis.
  • To assess the environmental and energy efficiency of the proposed method.

Main Methods:

  • One-pot reaction involving hydrolysis and dehydration of monosaccharides, polysaccharides, and plant juice.
  • Utilized pretreated hydrated niobium pentoxide (Nb(2)O(5)·nH(2)O(2)) as a solid acid catalyst.
  • Employed a water-2-butanol biphasic system at 433 K, with optional exoinulinase hydrolysis.

Main Results:

  • Achieved high HMF yields: 89% from fructose and 54% from inulin using Nb(2)O(5)·nH(2)O(2).
  • Obtained HMF yields of 74% from inulin and 65% from Jerusalem artichoke juice after exoinulinase hydrolysis.
  • Demonstrated the effectiveness of the solid acid catalyst under mild conditions.

Conclusions:

  • The developed solid acid-catalyzed process is environmentally friendly and energy-efficient.
  • This method provides a sustainable pathway for converting carbohydrates into valuable platform chemicals and biofuels.
  • Hydrated niobium pentoxide shows significant potential as a catalyst for HMF production.