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Determination of carbon and hydrogen in solid biofuel - Coulometric and gravimetric method
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Basic data
| Standard ID | NB/T 11644-2024 (NB/T11644-2024) |
| Description (Translated English) | Determination of carbon and hydrogen in solid biofuel - Coulometric and gravimetric method |
| Sector / Industry | Energy Industry Standard (Recommended) |
| Classification of Chinese Standard | F13 |
| Classification of International Standard | 75.160.01 |
| Word Count Estimation | 15,168 |
| Date of Issue | 2024-09-24 |
| Date of Implementation | 2025-03-24 |
| Issuing agency(ies) | National Energy Administration |
NB/T 11644-2024: Determination of carbon and hydrogen in solid biofuel - Coulometric and gravimetric method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of carbon and hydrogen in solid biofuel - Coulometric and gravimetric method
Energy Industry Standards of the People's Republic of China
The National Energy Administration released
Determination of carbon and hydrogen in solid biomass fuels
Coulometric method
Determination of carbon and hydrogen in solid biofuel-
Coulometric and gravimetric method
Published on 2024-09-24
2025-03-24 Implementation
CCS F 13
ICS 75.160.01
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Method Principle 1
5 Reagents and Materials 1
6 Instruments and Equipment 2
6.1 Instrument and Equipment Composition 2
6.2 Analytical balance 3
6.3 Others 3
7 Experimental Preparation 3
7.1 Filling and connecting the containers of the purification system 3
7.2 Filling and installation of the combustion tube 3
7.3 Electrolytic Cell Coating and Phosphorus Pentoxide Film Formation 4
7.4 Filling and connecting the containers of the absorption system 4
7.5 Checking the air tightness of the measuring system 4
7.6 Determination of system reliability test 4
8 Test Step 4
8.1 Determination of blank value 4
8.2 Test sample 5
8.3 Reagent Replacement and Electrolytic Cell Cleaning 5
9 Result calculation 5
10 Method precision 6
Appendix A (Informative) Carbon and Hydrogen Determination System 7
Table of contents
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Coal Industry Association.
This document is under the jurisdiction of the Standardization Expert Group of China Coal Industry Association.
This document was drafted by. Anhui Blue Sky Energy Environmental Protection Technology Co., Ltd., Anhui Coal Science Research Institute, Anhui Haofeng New Energy Science
Technology Co., Ltd., Anhui Vocational and Technical College, Hefei University of Technology, and Hefei Product Quality Supervision and Inspection Institute.
The main drafters of this document are. Ren Xiangjun, Ding Yuzhen, Wang Jian, Dai Zhaobin, Zhang Xuefei, Hu Zhongbo, Zang Zhenjuan, Zhang Jiajia, Wang Chuang, Zhou Chao,
Zou Yuzhu, Yue Wang, Ma Xiaocheng, Zhang Canming, Yuan Zheng, Kang Ning, Li Xianqing, Ma Peiyong, Xing Xianjun.
Determination of carbon and hydrogen in solid biomass fuels
Coulometric method
1 Scope
This document specifies the principle of the method for determining hydrogen in solid biomass fuels by the electrical method and carbon in solid biomass fuels by the gravimetric method.
Reagents and materials, instruments and equipment, experimental preparation, experimental steps, calculation of results and precision of methods, etc.
This document applies to solid biomass fuels.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.
document.
GB/T 6682 Specifications and test methods for water used in analytical laboratories
GB/T 21923 General rules for inspection of solid biomass fuels
GB/T 28730 Solid biomass fuel sample preparation method
GB/T 28731 Industrial analysis methods for solid biomass fuels
3 Terms and definitions
The terms and definitions defined in GB/T 21923, GB/T 28730 and the following apply to this document.
3.1
Solid biomass fuel solid biofuel
Solid fuels produced directly or indirectly from biomass.
3.2
general analysis sample
Solids crushed to a particle size of 1 mm or less and air-dried for most physical and chemical characterizations
Biomass fuel samples.
4 Principles of the method
A certain amount of solid biomass fuel sample is burned in an oxygen flow, and the generated water reacts with phosphorus pentoxide to form metaphosphoric acid. The metaphosphoric acid is electrolyzed.
The hydrogen content in the solid biomass fuel is calculated based on the amount of electricity consumed by electrolysis; the generated carbon dioxide is absorbed by the carbon dioxide absorbent, and the amount of hydrogen in the solid biomass fuel is calculated based on the amount of electricity consumed by electrolysis.
The carbon content in the solid biomass fuel is calculated by collecting the weight increment of the collecting agent. The sulfur oxides and chlorine generated after the sample is burned are treated with the pyrolysis products of silver permanganate.
Nitrogen oxides are removed using granular manganese dioxide to eliminate their interference with carbon determination.
5 Reagents and Materials
Unless otherwise specified, all reagents used in this document are of analytical grade and the water used should meet the requirements of Grade III water specified in GB/T 6682.
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