SOLVAir Select 200 Trona Application Guide

Transcription

1 SOLVAir Select 200 Trona Application Guide

2 Control acid gases with SOLVAir Select 200 Trona OLVAir Select 200 trona effectively cleans flue gas by reacting with acid gases, such as SO 2, SO 3 and HCl. Due to its effectiveness in removing SO 3 which competes with mercury for adsorption sites, trona has demonstrated good mercury removal efficiency. Its other major benefit includes enhancing the performance of the Electrostatic Precipitator (ESP). This application guide shows how it is used in Dry Sorbent Injection systems, and how to calculate the quantities needed to achieve the desired results. Chemical reactions for SOLVAir Select 200 trona 2( NaH 2H 2 O) 3 + CO 2 + 5H 2 O + SO 2 + ½ O 2 SO 4 + CO 2 + SO 3 SO 4 + CO 2 + 2HCl 2NaCl + H 2 O + CO 2 Why is SOLVAir Select 200 trona so effective? When used as a dry sorbent injected into an exhaust duct, SOLVAir Select 200 quickly reacts with acid gases, forming waste products that will not damage equipment. Various field tests have shown complete removal of SO 2 and SO 3 to below detectable limits. 2

3 Typical Dry Sorbent Injection System Trona is very capable of getting HCl levels below the MATS limit: lb/mmbtu. In addition, through effectively removing SO 3 it enables activated carbon to meet the mercury limit in MATS. When injected in high temperatures, it is able to remove approximately 10 20% of NO X. Industries using SOLVAir Select 200 trona for flue gas emissions abatement include coal-fired electric utilities, aluminum and other metal processors, waste incinerators, petroleum refining, and cement manufacturing. 2( NaH 2H 2 O) 3 + CO 2 + 5H 2 O At what temperature is SOLVAir Select 200 trona effective? At temperatures about 275 F (135 C), although temperatures above 325 F (159.5 C), are more desirable, SOLVAir Select 200 trona rapidly decomposes to soda ash. The rapid decomposition causes a tremendous increase in surface area. The high surface area and small particle size make trona very effective in reacting with acid gases. SOLVAir Select 200 prior to activation: very smooth grain surface 275 F >750 F SOLVAir Select 200 with a highly porous surface area after thermal activation. 3

4 On a molar basis this relation is: NSR = moles of sodium injected moles of acid gas entering system moles of sodium theoretically needed to react with a mole of acid gas Sodium sorbents reactivity The amount of sorbent injected into the flue gas is presented on a normalized basis, and is known as the normalized stoichiometric ratio (NSR). The NSR is expressed as the stoichiometric amount of sorbent required to react with all of the acid gases present in the flue gas. SOLVAir Select 200 trona required (lbs/lb) Or on a mass basis: NSR Acid mass of sodium injected mass of acid gas entering system NSR = SO mass of sodium theoretically needed to react with a unit mass of acid gas SO HCl HF

5 Performance Ranges SO 2 mitigation with SOLVAir Select 200 trona ESP SO 2 mitigation with SOLVAir Select 200 trona Baghouse 5

6 HCl mitigation with SOLVAir Select 200 trona S200 (ESP) Milled S200 (ESP) S200 (FF) Milled S200 (FF) HCl Concentration (lb/mmbtu) NSR Source: Pilot study by SOLVAir Solutions 6

7 Notes: 7

8 Disclaimer To our actual knowledge, the information contained herein is accurate as of the date of this document. However, neither Solvay Chemicals, Inc. nor any of its affiliates makes any warranty, express or implied, or accepts any liability in connection with this information or its use. This information is for use by technically skilled persons at their own discretion and risk and does not relate to the use of this product in combination with any other substance or any other process. This is not a license under any patent or other proprietary right. The user alone must finally determine suitability of any information or material for any contemplated use in compliance with applicable law, the manner of use and whether any patents are infringed. This information gives typical properties only and is not to be used for specification purposes. Solvay Chemicals, Inc. reserves the right to make additions, deletions or modifications to the information at any time without prior notification. SOLVAY is an international chemical Group committed to sustainable development with a clear focus on innovation and operational excellence. Its recent acquisition of specialty chemicals company Rhodia created a much larger player, which is realizing over 90% of its sales in markets where it is among the top 3 global leaders. Solvay offers a broad range of products that contribute to improving the quality of life and the performance of its customers in markets such as consumer goods, construction, automotive, energy, water and environment, and electronics. The Group is headquartered in Brussels. Its companies employ about 29,000 people in 55 countries and generated EUR 12.7 billion in net sales in 2011 (pro forma). Solvay SA (SOLB.BE) is listed on NYSE Euronext in Brussels and Paris (Bloomberg: SOLB.BB - Reuters: SOLBt.BR). Trademarks and/or other Solvay Chemicals, Inc. products referenced herein are either trademarks or registered trademarks of Solvay Chemicals, Inc. or its affiliates, unless otherwise indicated. Copyright 2014, Solvay Chemicals, Inc. All Rights Reserved. Solvay Chemicals, Inc Richmond Avenue Houston, Texas Telephone: SOLVAY C ( ) Fax: