    <SEC-DOCUMENT>0001193125-21-096570-index.html : 20210326
    <SEC-HEADER>0001193125-21-096570.hdr.sgml : 20210326
    <ACCEPTANCE-DATETIME>20210326161959
    ACCESSION NUMBER:		0001193125-21-096570
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		6
    CONFORMED PERIOD OF REPORT:	20210520
    FILED AS OF DATE:		20210326
    DATE AS OF CHANGE:		20210326

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			FUEL TECH, INC.
    		CENTRAL INDEX KEY:			0000846913
    		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL & COMMERCIAL FANS & BLOWERS & AIR PURIFYING EQUIP [3564]
    		IRS NUMBER:				205657551
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-33059
    		FILM NUMBER:		21777668

    	BUSINESS ADDRESS:
    		STREET 1:		27601 BELLA VISTA PARKWAY
    		CITY:			WARRENVILLE
    		STATE:			IL
    		ZIP:			60555
    		BUSINESS PHONE:		6308454431

    	MAIL ADDRESS:
    		STREET 1:		27601 BELLA VISTA PARKWAY
    		CITY:			WARRENVILLE
    		STATE:			IL
    		ZIP:			60555

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	FUEL TECH N V
    		DATE OF NAME CHANGE:	19930510
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>d330690ddef14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: d330690ddef14a.htm

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    <SEQUENCE>2
    <FILENAME>g330690g34f78.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g330690g34f78.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g330690g41y32.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g330690g41y32.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g330690g42p75.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g330690g42p75.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g330690g61w04.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g330690g61w04.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g330690g96e62.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g330690g96e62.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>