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Related Concept Videos

Electron Carriers01:24

Electron Carriers

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Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
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The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
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ADP/ATP carrier or AAC protein is the most abundant carrier protein in the inner mitochondrial membrane. It transports large quantities of ADP and ATP, equivalent to the average human body weight, every day. Among other transporters, ACC protein is one of the best-studied members of the mitochondrial carrier protein family. The ADP/ATP carrier protein comprises two transmembrane helices connected to a loop and a single alpha-helix on the matrix side. It switches between two conformational...
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Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
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Updated: Jan 29, 2026

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis
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Syngas production from biomass using Fe-based oxygen carrier: Optimization.

Jianjun Hu1, Chong Li1, Duu-Jong Lee2

  • 1Collaborative Innovation Center of Biomass Energy, Henan Agricultural University, Henan Province, Zhengzhou 450002, China.

Bioresource Technology
|February 17, 2019
PubMed
Summary

Chemical looping gasification efficiently converts biomass into syngas using an iron-based oxygen carrier. Optimization studies achieved a maximum H2/CO ratio of 2.20 for rice straw gasification.

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Area of Science:

  • Chemical Engineering
  • Renewable Energy Technologies
  • Catalysis

Background:

  • Chemical looping gasification (CLG) offers an efficient method for biomass conversion to syngas.
  • Traditional methods face challenges with heat loss and product dilution.
  • Iron-based oxygen carriers (OC) are explored for improved gasification.

Purpose of the Study:

  • To evaluate the gasification performance of four biomass types using a Fe2O3/Al2O3 oxygen carrier.
  • To optimize the gasification process for rice straw to maximize the H2/CO ratio.
  • To assess the viability of Fe-based OC for syngas production from diverse biomass.

Main Methods:

  • Gasification tests were conducted on rice straw, corn stalk, peanut shell, and wheat straw.
  • A 60% Fe2O3/Al2O3 oxygen carrier was used at specific OC/biomass and steam/biomass ratios.
  • Box-Behnken experimental design was employed to optimize reaction parameters for rice straw.

Main Results:

  • All biomass samples showed comparable gasification results, with CO content (19.2-23.1%) and H2 content (36.5-41.1%).
  • Carbon conversion rates ranged from 72.3-82.2%, with gas yields between 0.78-1.04 L/g.
  • Optimized conditions for rice straw yielded a maximum H2/CO ratio of 2.20.

Conclusions:

  • Fe-based oxygen carriers are effective for syngas production from various biomass sources.
  • The CLG process demonstrates promising efficiency and low adverse effects.
  • Optimized parameters significantly enhance syngas quality, particularly the H2/CO ratio.