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Related Concept Videos

Other Glycolytic Pathways01:24

Other Glycolytic Pathways

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The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
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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.
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In cellular metabolism (the complete breakdown of glucose to extract energy),  glycolysis is the first step. Glycolysis takes place in the cytoplasm of both prokaryotic and eukaryotic cells. Glucose enters heterotrophic cells in two ways. One method is through secondary active transport, where the transport takes place against the glucose concentration gradient. The other mechanism uses a group of integral proteins called GLUT proteins, also known as glucose transporter proteins. These...
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Methanol Independent Expression by Pichia Pastoris Employing De-repression Technologies
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Optimization of biomass-to-methanol production pathways using P-graph approach.

Chao Wang1, Weilun Zhang1, Jui-Yuan Lee2

  • 1School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China.

Bioresource Technology
|December 18, 2025
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Summary

Biomass waste can be converted to methanol, a key chemical. This study optimized pathways, finding anaerobic digestion most cost-effective but with higher CO2 emissions than gasification.

Keywords:
Biomass economyMethanolOptimizationProcess integration

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Area of Science:

  • Biomass valorization
  • Sustainable chemistry
  • Process optimization

Background:

  • Agricultural and food production generate significant biomass waste.
  • Biomass is a sustainable feedstock for the chemical industry, particularly for methanol production.
  • Limited research exists on optimizing biomass-to-methanol pathways considering technological uncertainties.

Purpose of the Study:

  • To systematically plan and optimize biomass-to-methanol production pathways.
  • To identify cost-effective and environmentally sustainable routes for green methanol production.
  • To evaluate the economic and environmental trade-offs of different conversion technologies.

Main Methods:

  • Utilized the P-graph framework for pathway optimization.
  • Employed Design of Experiments (DoE) to select 25 representative scenarios.
  • Analyzed economic costs and CO2 emissions for various pathways.

Main Results:

  • Anaerobic digestion (AD) pathway offers the lowest production cost ($725/t MeOH) but higher CO2 emissions (1.340 t CO2/t MeOH).
  • Gasification pathway achieves the lowest CO2 emissions (0.513 t CO2/t MeOH) at a higher cost ($805/t MeOH).
  • Hybrid pathways show potential to outperform standalone options under specific conditions.

Conclusions:

  • The study identifies economically viable and environmentally conscious biomass-to-methanol pathways.
  • Findings provide crucial insights for decision-making in green methanol production.
  • Balancing cost-effectiveness and environmental impact is key for sustainable biomass valorization.