ISO 18134-2:2024 PDF

Overview

ISO 18134-2:2024 defines a simplified oven-drying method for determining the moisture content in solid biofuels. Moisture testing is essential for routine production control within the solid biofuels industry, as moisture affects fuel quality, combustion efficiency, transportation, and storage. This standard provides a practical approach where the highest analytical precision is not necessary, making it suitable for on-site applications and regular quality checks. The method applies to a wide range of solid biofuels, including wood chips, pellets, briquettes, and agricultural residues, supporting both large-scale and small-scale energy producers.

Key Topics

• Scope and Applicability
  • Covers all types of solid biofuels.
  • Designed for routine and on-site moisture control where high precision is not required.
• Moisture Content Determination
  • Samples are dried in a ventilated oven at 105 ± 2°C until constant mass is achieved.
  • Moisture is reported on a wet basis, representing the percentage of water relative to the total sample mass.
  • For pre-dried materials, an adjusted calculation is provided.
• Sample Preparation and Handling
  • Test samples must be sealed and protected from environmental changes to maintain representative moisture levels.
  • Minimum test portion: 300 g for most materials or 100 g for fine particulates (e.g., sawdust).
  • Emphasizes minimizing moisture loss before measurement, especially during size reduction and sample transfer.
• Procedure Highlights
  • Samples are evenly spread in heat-resistant, non-corrodible trays.
  • Weighing occurs before and after drying, while the sample remains hot to avoid moisture reabsorption.
  • The simplified method does not account for air buoyancy effects, differentiating it from the reference method (ISO 18134-1).
• Reporting Requirements
  • Laboratories must document sample identity, date, test result, deviations, and any items that could affect accuracy.

Applications

ISO 18134-2:2024 has a broad range of practical applications across the bioenergy sector:

• Production Facilities: Rapid, reliable checks of incoming and outgoing solid biofuels to ensure consistent moisture content and optimize fuel handling.
• Power Plants and Biomass Boilers: Routine monitoring of feedstock quality to improve combustion efficiency and reduce emissions.
• Biomass Traders and Suppliers: Standardized assessment of product quality for transparent transactions and supply chain compliance.
• Research and Development: Benchmarking of various biofuel types during product innovation or comparative studies.
• Regulatory Compliance: Enables demonstration of adherence to national and international bioenergy quality standards.

By ensuring correct moisture measurement, this standard supports better fuel handling, maximized energy output, and improved equipment lifespan across the biofuel supply chain.

Related Standards

• ISO 18134-1: Solid biofuels - Determination of moisture content - Reference method (higher precision method).
• ISO 14780: Solid biofuels - Sample preparation (guidelines for proper sample handling and reduction).
• ISO 16559: Solid biofuels - Vocabulary (standardized terminology).
• ISO 18135: Solid biofuels - Sampling (sampling methods for representative testing).
• ISO 21945: Solid biofuels - Simplified sampling method for small-scale applications.

Adopting ISO 18134-2:2024 in conjunction with these related standards ensures accurate, reliable, and harmonized moisture analysis in solid biofuels, supporting quality assurance and industry best practices.