成果報告書詳細
管理番号20100000001300
タイトル*平成21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-H22)
公開日2010/10/21
報告書年度2009 - 2009
委託先名財団法人電力中央研究所 出光興産株式会社 財団法人石炭エネルギーセンター
プロジェクト番号P07021
部署名クリーンコール開発推進部
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ける微量成分除去技術の開発には、高精度の測定技術が必要である。分析技術として、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。本技術開発では、分析技術の国際的な標準化を目指し、課題の整理とその解決法を検討するとともに、規格化に資するためコールバンクの拡充と同バンクの石炭を利用したデータの蓄積を行う。 2. 研究開発の内容 (1) コールバンクの拡充 財団法人石炭エネルギーセンター(JCOAL)と独立行政法人産業技術総合研究所(AIST)は、石炭利用基盤技術開発(Brain-C)プログラム(H7-H17)から引き継いで「コールバンク」として世界の石炭100種を不活性ガス下で粉砕保存し、研究用試料として系統的なデータとともに提供する事業を行ってきた。
英文要約Summary
1. Subject of the study
Accurate measurement methods are indispensable for investigating behavior of trace elements in coal combustion boiler and removing them from combustion gas. There are some gaseous trace elements that are not covered by measurement standards, and methods of analyses for them in coal are not standardized by either ISO or JIS.
The aim of this study are to collecting data for the preparation of international standard methods of trace elements in coal combustion gas and to establish a new analytical method for trace elements in coal and add the trace element data to Coal Database.
2. Results
(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 coals 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, user interface and screen design were investigated in various screen such as a top page and a searching screen.
(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. AIST attended the international meeting ‘2009ISO/TC27’ (Vancouver) and confirmed that 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” was activated. AIST also conducted information exchange with members from main countries to discuss about a standardization of the analytical method. In Japan, domestic committee started to examine standardization for JIS based on the ISO23380:2008.
Using the method described in ISO23380, in FY2009, analysis of trace elements for 23 kinds of coals 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
We investigated a recovery method of Se sticking on the inside of sampling tube for measurement of gaseous Se in flue gas. Form of Se which is strongly sticking inside the tube is metallic Se. The solubility of metallic Se in H2SO4/KMnO4 was tested experimentally. Judging from the former experiments, the amounts of Se is less then 1 μg on the inside of a sampling tube. The solubility test of metallic Se in H2SO4/KMnO4 showed it could be fully recovered with 3 g/L H2SO4/KMnO4 if 40 mL of it was used for washing the tube. Based on the result, practicality of recovery method of Se from actual flue gas was examined with H2SO4/KMnO4 as a next step.
As recovery solvents we used H2SO4/KMnO4 and HNO3/H2O2 which is conventionally used for Se analysis in flue gas. It is found that more Se can be recovered with the solvent of H2SO4/KMnO4 than HNO3/H2O2. It seems Se sticking on the inside of sampling tube can be almost recovered with H2SO4/KMnO4 by optimizing the concentration and the amount of the solvent.
b) A proposal in regard to standardization of analytical method of gaseous boron in flue gas
In this fiscal year we collected data to evaluate of accuracy required to a proposal of JIS standardization and started to make a draft proposal of JIS.
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