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Press release

14th December 2016

Air pollution created by harmful emissions is a major concern around the world. To help address this problem, leading catalyst manufacturers have formed a new association dedicated to promoting catalytic technology for the control of these harmful emissions. The Association for the Catalytic Control of Emissions from Stationary Sources to air - "accessa" - was founded by member companies Clariant, Haldor Topsoe and Johnson Matthey. All are technology leaders in the field of emissions control.

The Association's primary objective is to improve the understanding and awareness of the capability of catalytic after-treatment technology, especially in applications as applied to hot exhaust gas before it enters the wider atmosphere – where catalysts can remove up to 95% of oxides of nitrogen (NOx), carbon monoxide (CO), volatile organic compounds (VOC)/hazardous air pollutants (HAP) and particulate material. The aim of accessa is to work globally with regulators, non-governmental organizations and other interested parties to advocate the deployment, demonstration and development of cost effective technology solutions. 

Cindy Khalaf, Managing Director of Stationary Emissions Control at Johnson Matthey, commented: “Emissions from combustion processes are responsible for much of the air quality problems associated with NOx, CO, VOC and particulate material. Whilst significant progress is being made on the control of emissions from mobile sources, there is significant potential for the control of emissions from large stationary point sources.  Emission control catalysis can be used to reduce emissions of NOx and mercury from coal-fired boilers; NOx, CO from gas turbines and NOx, CO and VOC/hydrocarbons from stationary engines.” 

Joakim Riemer Thoegersen, Managing Director of Haldor Topsoe in China, stated: “We can capture the many synergies from the 40 years of technical advancement in the mobile sector – but the stationary sector has its own challenges and we have been developing dedicated technology for over three decades. We have fully commercialised technology and state of the art technology ready for deployment – to help in the cost effective control of emissions from larger point sources.”

In his comments, Georg Anfang, Head of Air Purification Catalysts at Clariant, emphasized the benefits of delivering cost effective solutions to air quality controls, and especially regarding emissions from large point sources: “Each of accessa's member companies are dedicated to helping ensure our environment will be protected for each coming generation. One of our key objectives is to work with regulators to educate, and also understand, the timing of the changes in the regulatory framework allowing us to develop the right solutions. In this way the Association will perform a dual function to the market place and the industry.”

For further information on the Association, including application for membership, please contact


Global Trade Media Relations

Stefanie Nehlsen
Phone +41 61 469 63 63

Phone +45 22 75 43 58


SALLY JONES, Director, IR and Corporate Communications
Phone +44 20 7269 8407 

Clariant is a globally leading specialty chemicals company, based in Muttenz near Basel, Switzerland. On 31 December, 2015, the company employed a total workforce of 17,213. In the financial year 2015, Clariant recorded sales of CHF 5.807 billion for its continuing businesses. The company reports in four business areas: Care Chemicals, Catalysis, Natural Resources, and Plastics & Coatings. Clariant’s corporate strategy is based on five pillars: increase profitability, reposition portfolio, add value with sustainability, foster innovation and R&D, and intensify growth. 

Clariant’s Catalysts business unit is a leading global developer and producer of catalysts for industrial processes. It has been part of the Catalysis business area of the Clariant Group since the acquisition of Süd-Chemie in 2011. Clariant Catalysts is headquartered in Munich, Germany, and has a total of 18 production sites, and 12 R&D and technical centers around the world. Approximately 1790 employees serve customers across all regional markets. Aimed at delivering sustainable value to customers, Clariant’s catalysts and adsorbents are designed to increase production throughput, lower energy consumption, and reduce hazardous emissions from industrial processes. The broad portfolio also includes products that enable the use of alternative feedstock for chemical and fuel production. 

Haldor Topsoe is a world leader in catalysis and surface science, committed to helping our customers achieve optimal performance. We enable our customers to get the most out of their processes and products, using the least possible energy and resources, in the most responsible way. We are headquartered in Denmark and have project development, R&D, engineering, production plants, and sales & service across the globe. In 2015, our revenue was approximately 860 million US dollars, and we employ some 2,600 employees.

Johnson Matthey is a global speciality chemicals company underpinned by science, technology and its people. A leader in sustainable technologies, many of the group's products enhance the quality of life of millions through their beneficial impact on the environment, human health and wellbeing.

Johnson Matthey has operations in over 30 countries and employs around 13,000 people. Its products and services are sold across the world to a wide range of advanced technology industries. For more information about Johnson Matthey please visit