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Case History - Australian Fused Materials, Electric Arc Furnance, Nox Removal

SCR is used to clean industrial exhaust air of NOx pollutants, particularly NO and NO₂. SCR uses a combination of ammonia and catalyst to achieve highly efficient NOx destruction whilst minimizing operating costs. Most of the NOx is broken down and recombined with ammonia to produce nitrogen and water vapour, which can safely be vented to atmosphere. EGL uses a catalyst and system design sourced from CRI Catalyst Company, a subsidiary of Shell. The unique CRI design in comparison with conventional designs results in high reaction rates, very low pressure drop and high activity at far lower temperatures.

Typical applications are on nitric acid plants and gas turbines in the power generation industry.

Reference List

Environmental Catalysts & Systems

SHELL DENOX SYSTEM
Commercial Units

COMBUSTION APPLICATIONS	Location	%NOx Conversion	Operating Temperature (°C)	Flow Nm³/ hr
Gas Turbines	USA,California (3)	93	177	(3x) 370,000
	USA, Texas	90	175	48,000
	USA, California (3)	93	185	(3x) 350,000
	Netherlands (2)	89	170	(2x) 275,000
	Netherlands	92	185	150,000
	USA, Texas	95	177	910,000
	USA, California	90	230	117,000

Refinery Heaters	USA,California	87	215	22,000
	Sweden	90	177	100,000
	USA,California	90	230	260,000

Ethylene Crackers	Germany (5)	66	160	(5x) 60,000
	Germany (1)	66	140	50,400
	Netherlands (2)	91	215	(2x) 69,000

PROCESS PLANTS	Location	%NOx Conversion	Operating Temperature (°C)	Flow Nm³/ hr
Caprolactam Plants	Netherlands	96	260	32,000
	Korea	98	260	42,000
	Korea	97	270	47,500
	Taiwan	97	187	46,000
	India	97	200	8,100
	UK	90	380	94,000
	Poland	98	340	6,800

Catalyst Plants	Belgium	98	250	23,500
	USA,California (2)	96	240	15,500
	UK	93	270	13,000
	Germany	97	250	14,000

Chemical Process	USA	97	400	107,000

Nitric Acid Plants	South Africa	88	205	70,000
	Denmark	83	170	30,000
	USA	96	250	27,000
	USA	95	165	15,000
	USA	91	230	27,000
	Spain	95	220	50,000
	Netherlands	87	265	260,000
	UK	95	225	107,000
	UK	90	380	145,000
	Spain	98	220	45,500
	Australia (2)	90	390	2 x 43,800
	Australia	90	390	37,300

COMBUSTION APPLICATIONS	Location	%NOx Conversion	Operating Temperature (°C)	Flow Nm³/ hr
Boiler	USA, California	86	325	35,000
	USA, California	83	480	80,000
	USA, California	83	450	80,000

Electrical Arc Furnace	Australia	93	200	22,000

Waste Incinerators	Netherlands	89	240	66,000
	Italy	94	175	5,400
	USA	90	205	102,000
	Germany	95	260	14,000
	Ireland	87	280	31,000
	Italy	77	165	62,600
	France	83	270	16,600
	Japan	80	250	9,500
	Korea	50	220	41,600
	Italy (2)	83	260	(2X) 87,000

Case History

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Australian Fused Materials
Electric Arc Furnance, Nox Removal

Location		East Rockingham, WA
Completion Date		1999
Project Duration		12 months

Environmental Group Scope of Work:
Design, manufacture and install a Selective Catalytic Reduction (SCR) DeNOx System at Australian Fused Materials, East Rockingham WA.

Equipment Supplied:
	Gas-to-Gas heat exchanger Duct burner and associated gas train Selective Catalytic Reduction (SCR) housing Lateral Flow Reactor (LFR) module/s Catalyst Ammonia injection grid and associated control valve train Instrumentation Access platform Mechanical and electrical installation Commissioning


Design specifications:
	Gas flow rate : 35,000 Nm³/hr NOX inlet load : up to 1500 ppm NOx outlet load : less than 100ppm