成果報告書詳細
管理番号20120000000266
タイトル*平成20年度中間年報 戦略的石炭ガス化・燃焼技術開発(STEP CCT)石炭利用プロセスにおける微量成分の環境への影響低減手法の開発 微量成分の高精度分析手法の標準化に資するデータ蓄積(H19~H20)
公開日2013/1/8
報告書年度2008 - 2008
委託先名財団法人石炭エネルギーセンター 財団法人電力中央研究所 出光興産株式会社
プロジェクト番号P07021
部署名環境部
和文要約和文要約等以下本編抜粋:
1.概要
石炭燃焼プロセスにおいて、微量成分の除去技術開発には、高精度の測定技術が必要である。分析技術は、ガスとして存在する物質の一部は公定法が存在せず、固体の石炭は、国際規格ISO、国内規格JISとも存在しない。
英文要約1. Subject of study
For removing trace elements from coal combustion gases, highly accurate measurements are indispensable. There are some gaseous trace elements that are not covered by official measurement standards, and solid coal is not covered by either ISO or JIS.
The aim of this study was to expand the Coal Database, and to accumulate data for the preparation of an international standard.
2. Outline
(1) Coal Bank
JCOAL and AIST have collaboratively operated a standard coal sample bank, “Coal Bank” since FY1995 under the framework of Brain-C program. In the Coal Bank, 100 kinds of coal consist of 10 US, 18 Chinese, 29 Australian, 19 Indonesian, 7 Russian, 6 South African, 1 Vietnamese, 3 Canadian, 2 Colombian, and 5 Japanese coals, are maintained under inert atmosphere with analytical database including ultimate, proximate, maceral, and ash analysis data. The samples are identified as SS numbers and delivered to related institutes for research use with particle size of -5mm, -1mm and -100mesh in a laminated package with nitrogen atmosphere.
JCOAL is managing the database in an electronic form including construction, updating, distribution, and so on. This fiscal year, data structure, security control and utilities to meet users' requests for an extended database, including trace element analysis, are being evaluated and investigated.
(2) Analytical database of trace elements in coal for standardization
AIST has developed an efficient method to analyze trace elements in coal using microwave assisted pretreatment combined with an inductively coupled plasma(ICP) analyzer. Based on the method, an ISO standard for the determination of trace elements in coal was proposed. After activities for standardization in ISO such as ISO/TC27 meeting, an ISO guide including AIST method in its Annex B was published as ISO23380:2008 “Selection of methods for the determination of trace elements in coal” in October, 2008. Using the method described in ISO23380, in FY2008, analysis of trace elements for 40 kinds of coal maintained in the Coal Bank was performed. Results were accumulated in the coal data base to serve as a basis of activities for standardization.
(3) Advanced sampling and analysis of gaseous trace elements
a) Development of optimum sampling method
Study of selenium sampling
The accuracy of gaseous selenium measurement in coal combustion flue gas was investigated. It was found that the recovery of sticky selenium adhered on the internal surface of tubing improved the accuracy of the measurement.
Study of boron sampling
The effect of sampling temperature on the measurement of gaseous boron was examined. It was found that gaseous boron was not adsorbed on the internal surface of tubing made of glass or PTFE at 403K. The series of study in this project showed that the proposed measurement method was suitable for gaseous boron in combustion flue gases containing acid gases such as SOx, NOx, and halogen.
b) Study on possibility of sampling method for flue gas
The sampling method for gaseous/particle B and Se in a coal combustion process was investigated using a coal combustion test facility in ICERL (Idemitsu Kosan Co.,Ltd.). The currently sampling method was conformed to CRIEPI’s. Nitric acid-hydrogen peroxide solution was used for B and Se, and gas sampling lines were dissolved with coal dust.
As the results of this study, we are sure that we can divide into gaseous/particle B and Se reproducibility/repeatability test under several coal-types combustion condition.
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