First Limestone-Gypsum FGD Systems in Indian Market: Mitsubishi Hitachi Power Systems, Ltd.

- Uttar Pradesh, India

   There are multiple applications for removing sulfur and certain emissions from exhaust flue gases of coal-fired power plants. Some examples are: Wet scrubbing using a slurry of alkaline sorbents, spray-dry scrubbing, wet sulfuric acid process recovering sulfur in the form of commercial quality sulfuric acid; and dry sorbent injection systems.

National Thermal Power Corporation Limited (NTPC) is tackling the first series of limestone gypsum FGD systems in the Indian Market. NTPC is India's largest energy conglomerate with roots going back to 1975. NTPC Ltd is an Indian Public Sector undertaking, engaged in the business of generation of electricity and allied activities. Some of the largest coal fired power stations in India are owned and operated by NTPC.

Mitsubishi Hitachi Power Systems (Japan) has received an order from NTPC to implement India’s first ever Limestone-Gypsum FGD System in India. There will be six systems installed, on top of the already functioning power generating facilities in Central and Northern India. Two of the installation will occur at the Mouda Facility, with a combined capacity of 1320MW. Other systems will be installed at Rihand plants two and three, with 2000 MW capacity total. The FGD system type that will be implemented at these facilities will be a dry spray desulfurizing scrubber system.

Mitsubishi Hitachi Power Systems is a conglomerate of Mitsubishi Heavy Industries, Ltd. (MHI) and Hitachi, Ltd. Since 2014, MHPS has been achieving goals in environmental technologies and project engineering across the globe.

Here is how MHPS is helping NTPC curb emissions of atmospheric pollutants by using off-gas cleanup systems and technologies:

1.     The desulfurization absorbs sulfur oxides, and collects the generated gypsum by reacting limestone with SOx.

2.     The open sprayer system sprays absorbent (limestone slurry) from above the compact flue gas scrubbing tower to absorb harmful SOx efficiently.

More than ever before, India is pursuing rigorous emission-fighting methods for every stage of the energy producing process, from cleaning coal, to processing and utilisation technologies post combustion.  Since coal is still India’s top energy source, adding FGD type systems is actually becoming increasingly common. Only time will tell which technologies will aid India’s goals best and extend to industry wide practice.

Trung Hau Manufacturing: Watch Video on 100% Quality Sand from Fly Ash

- Vietnam

Trung Hau Manufacturing Company (http://www.trunghau.com/english/index.html) would like to introduce our members to a new technology, which proposes to transform all landfill and excess fly ash being released from power thermal plants into useful materials (artificial sand - stones). This technology has the ability to work on most fly ash compositions. Please click on the video link to learn more about Trung Hau’s semi-dry geopolymer and how they create 100% industrial quality sand from fly ash.

The president of Trung Hau, Mr. Tran Nghia, and a strong delegation including Dr. Do Minh, were active participants at this year’s Coal Ash Asia 2018. Dr. Minh delivered an oral presentation and paper concerning his research on “Accelerating the Polymerization Process of Fly Ash By Microwave”. To read more about this research or other research from our September event, please request our CAA2018 handbook, with over 50 abstracts, by entering your email below.

If you would like to learn more about Trung Hau operations, or to contact our members, please contact AsianCAA staff for more information.




Coal Ash Asia 2018: A Recap

-Shuozhou City, Shanxi Province, China

A big thank you to everyone who participated in our Coal Ash Asia 2018 proceedings in Shuozhou City, China, this past September 12-15th. This year's topics focused on the high-value utilization of fly ash, FGD gypsum and coal gangue as well as highlight applications in building material products (cement, concrete, geopolymers etc).

A special thank you to our international delegation (click organisation to visit website):

We would like to extend our humble gratitude to our friends at the China Building Materials Academy’s Institute of Technical Information for the Building Materials Industry, in Beijing. This year’s extension and construction of our annual products and services exhibition was our largest in Coal Ash Asia history, with over 50 exhibitors, and a welcome ceremony which included an orchestra playing on instruments made primarily from fly ash!  

New to this year’s proceedings was our Technology Symposium track geared towards new technologies in fly ash, which included discussion on fly ash based aggregates, fillers, and ceramic tiles. Contributors to this track included: Prof. Chang Jiqing from Guangdong Penghu Industrial Co., Ltd., Zhang Jingjie from Shanxi Hujin Coal Electricity New Material Co., Ltd., Ma Liantao from Hengyuan Waste Utilization, and Peter Ma from Shandong Wei Tong Technology Co., Ltd.

Another new feature was our meeting dedicated to new FGD gypsum technologies. Content included alpha high strength gypsum and calcination methods. Contributors included: Prof. Duan Pengxuan from Guilin University of Technology, Prof. Xiang Lan from Tsinghua University, and Li Yushan from Shandong Pingyi Kaiyuan New Building Material Co., Ltd.

This year also welcomes esteemed contributor, Mr. Bill Martin, who led engaged attendees in his workshop, “Fly Ash Use in Road and Embankment Construction”. Here, Mr. Martin led the discussion for industry experts, who explained real-world projects of American and Australian fly-ash in road projects. Also discussed were new technology and applications in road engineering. Attendees were able to openly discuss and compare methods and approaches to road construction, and receive technical explanations as to the process of applying road and embankment technology from start to finish.

We are excited to announce upcoming events and association/research developments in the new year. Please sign up for our newsletter to stay in touch!

 Here are a few pictures from CAA2018! An Album will be available under past events, in the coming weeks.

Want to Download the Conference program from CAA2018? You can find it on our CAA introduction page.

Save When You Register for WOCA2019 Through AsianCAA

-St. Louis Missouri, USA

AsianCAA members and network organisations will be attending the 2019 World of Coal Ash Conference and Exhibition in St. Louis, Missouri, May 13-16. WOCA is organized by or friends at the American Coal Ash Association (ACAA) and the University of Kentucky’s Center for Applied Energy Research (CAER). The 2019 conference is the 8th joint biennial meeting with a focus on the science, applications and sustainability of worldwide coal combustion products (CCP’s) as well as gasification products. The University of Kentucky Center for Applied Energy (CAER) explores technologies to improve the environment from energy efficiency. Researchers add to technically sound strategies related to fossil and renewable energy.

CAER follows multiple academic disciplines at their research centers, specializing in:

·       Beneficiation, utilization, and conversion process technologies

·       Fuel use

·       By-products of coal combustion

·       Engineered fuels

·       Derivation of high added-value materials and chemicals 

·       Renewable energy such as biofuels and bioenergy, electrochemistry, solar energy and environmental remediation.

The CAER is proudly supported by UK, and is staffed by professional scientists and engineers. The Center has extensive interactions with faculty members and students, and provides analytical services for external commercial and academic organizations.

In order to extend access to industry leaders in Asia, anyone who registers through AsianCAA will save $200 on early bird registration (ends May 1st, 2019).

Please complete the following form for each attendee from your organisation, and we will process your registration. For any questions, please contact s.laing@asiancoalash.org


Research Highlight: Shandong University

- Jinan, China

Shandong University is located in Jinan CIty, Shandong Province, in the eastern part of China.

Professor Wang Wen Long and the team at Shandong University’s National Engineering Laboratory for Coal-fired Pollutants Emission Reduction have focused on complimentary utilization, solid wastes and life cycle assessment in their latest research. The research pertaining to Sulfoaluminate cementitious material at was presented 2017’s Coal Ash Asia conference in Beijing, China. Below is the abstract from this paper.

Complementary Utilization of Red Mud, FGD Gypsum and Other Solid Wastes to Prepare Sulfoaluminate Cementitious Material

Abstract: In the utilization processes of single solid waste, some fundamental problems always exist, including small solid waste dose, high cost, poor performance and low added value of products, difficulties in market exploitation, etc. Professor Wang proposes complementary utilization of varied solid wastes. High-performance sulfoaluminate cementitious materials (SCM) were successfully prepared by using 100% industrial solid wastes (red mud, flue gas desulfurization gypsum, aluminum slag and carbide slag) in an industrial rotary kiln at 1300°C. The product performances reached as high as 39MPa ,57MPa and 76MPa for 1d, 3d and 28d compressive strength, respectively. Environment impact assessment was also conducted for this process based on life cycle theory. It was proven that using industrial solid wastes to prepare SCM could reduce total environmental burden by 38.62% compared to using conventional materials. This technological conception can promote the large-scale utilization of massive solid waste and boost green and circular development of society.

Shandong University will return at AsianCAA’s Coal Ash Asia 2018 in Shuozhou City, the fly ash utilization center of China. Click below to register for CAA2018 and network with global academic and industry leaders during 3 days of exhibitions, seminars, scenic and industry tours.

Shuozhou City: China's developing circular economy

- Shuozhou City, Shanxi Province, China

The Asian Coal Ash Association, partnering with the Institute for Technical Information for the Building Materials Industry will host the 8th annual Coal Ash Asia conference this September 12-15. Coal Ash Asia consists of three days of oral presentations, trade and services exhibition, poster exhibition, scenic and industrial tours as well as multiple networking opportunities.

Shuozhou City produces approximately 8 million tons of fly ash and 1.8 million tons of gypsum each year, and disposes of nearly 5 million tons each year into landfill.  Spreading over 145, 000 acres, China’s premier coal ash industrial park is located next to a large coal ash reservoir and is key in the country’s development of circular economy.

There are almost one hundred of coal ash based products in the park, including:

·      Ultrafine Fly Ash,

·      Fly Ash Based Flooring

·      Fly Ash Based Furniture

·      Ceramic Fiber Cotton

·      Fly Ash Based Calcium Silicate Board

·      Aluminum oxide and Hydrated silica

·      Thistle board

·      Autoclaved Fly Ash Brick,

·      Autoclaved Aerated Concrete Blocks,

·      Gypsum Based Dry Mix Mortar,

·      Lightweight Wallboard

·      Cement

·      Concrete

·      And more!

Want to download a copy of the Shuozhou Industrial Park? Enter your email below and we will email it to you (file size: 91MB)

Included in the guide is an overview of operations including the park’s R&D center, a collaborative effort of Peking University and the local Shuozhou government. With a combination of advanced technology, excellent equipment and innovative talents, the R&D center focuses on the development of new technologies and new products for enterprises within the industrial park. The Center has developed many new technologies and products including: Ceramic tiles and fiber cotton, foam ceramics, catalyst carriers, high strength fibers, wall materials, refractory and heat insulating materials.

This September, all attendees will have the chance to go on an in depth tour of the Shuozhou Industrial Park, and speak with park researchers, operators and managers. The delegates will be accompanied by a team of translators to assist with this exchange.

Want to learn more about participation at Coal Ash Asia 2018?

Research Highlight: Acid Extraction of Valuable Resources in Fly Ash and Various Utilizations of Acid Slag

- Beijing, China

Aluminium and rare earth mineral extraction was a well-explored topic at AsianCAA’s latest Coal Ash Asia event, in Beijing, last July.   Vice Professor Li Fang Fei, from JiLin University, shared her research pertaining to acid leaching in order to extract precious rare earth minerals. Jilin University is a key collaborator with the China Building Materials Academy (CBMA), and the Institute for Technical Information for the Building Materials Industry, our co-hosts of Coal Ash Asia. The university's chemistry department contributes essential research to the topic of waste utilization and management.  Below is Professor Li Fang Fei’s abstract, discussing her latest research.

Abstract: Fly ash is the main solid waste of power plants. After combustion, the aluminum, rare earth and other valuable resources in the raw coal are further enriched in the fly ash. That makes the high Al2O3 content in the fly ash of Inner Mongolia region (up to 50 wt % ). Aluminum, iron, gallium, and other rare earth resources in fly ash could be extracted by acid leaching process. And followed by resin separation, enrichment leaching, and crystallized purification process, various valuable resources could be successfully separated and purified to an ideal level. Such leaching method is not only applicable to the high-active CFB fly ash, but also suitable for the OF fly ash whose amount is much larger than the former. In addition, the amount of acid leaching slag of fly ash is very small, which is composed of porous SiO2 with ideal purity and highly reactivity. Such "white mud" could be produced as building materials, artificial zeolites, inorganic fibers, catalyst carriers, and other useful products, which promotes the governance and comprehensive utilization of fly ash.

Jilin University will be returning contributors to Coal Ash Asia 2018. For more information, or to register, please follow the links below. If you would like to be sent an information package regarding our event, please input your email below.

For more information on other papers from Professor Li Fang Fei, click below:

Research Highlight: Synthesis of High Quality Zeolites from Coal Fly Ash

- Perth, Australia

Dr. Kevin Li (Gang Li), participated in CAA2017 on behalf of the Centre for Energy, School of Mechanical & Chemical Engineering at the University of Western Australia in Perth, Australia. Dr. Li, a returning speaker to Coal Ash Asia, focused his presentation on synthesizing zeolites and necessary related conditions. The below abstract is an overview of the research presented at the conference. For more of Dr. Li’s publications and research, please click the link at the bottom of the abstract.

Abstract: Coal fly ash is a hazardous industrial waste generated from coal combustion and has been considered as an appropriate raw material for zeolite synthesis. In this study, synthesis of a high-quality type A zeolites (471m /g surface area) from fly ash at high conversion rate (98.2% aluminium and 96.5% silicon) has been achieved via a two-step alkali fusion and hydrothermal procedure. Furthermore, in preparation for production in commercials scale, up scaling of the developed synthesis process has been undertaken by using 150L reactor. More importantly, we tracked the migration of elements and quantified their distribution from fly ash to product zeolites and waste water throughout the synthesis process. Metalloid elements including arsenic and selenium, and those with strong amphoteric properties such as molybdenum were found highly mobile and mostly collected in the waste water. In comparison, less than 20% of heavy metal elements of weak amphoteric nature including copper, chromium and lead originated from the fly ash went to the waste water; the rest of these three heavy metals along with almost all of the cadmium, iron and nickel were fixed into the product zeolites. Despite the accumulation of hazardous elements in product zeolites, none of them was leachable under various harsh conditions, ensuring safe applications of such zeolites.

If you are interested in attending Coal Ash Asia 2018 in Shuozhou, please click the "CAA2018" link to register, and our event team will assist you in finding the participation that's right for you.

Fly Ash Use in Road and Embankment Construction: A Goa Workshop

- Panaji, Goa

Another successful workshop, organized by AsianCAA and hosted by our friends at ALCON (Anil Counto Enterprises) took place in Goa, India during the globally prestigious CoalTrans India conference.

The speaker, Mr. Bill Martin, is an experienced operations, sales and marketing executive with decades of experience in the construction materials industry. Bill’s expertise covers raw materials procurement, supply chain management, new business development and manufacturing operations in cement, masonry and concrete products.

Bill has held positions at the ADAA (Ash Development Association of Australia) and the Concrete Masonry Association of Australia.

A regular at the annual Asian Coal Ash Association’s Coal Ash Asia conferences, Bill and the team at CAS (Coal Ash Solutions) team offer complimentary introductions, translation and business matching to all international guests in attendance.

The Workshop:

Explored in “Fly Ash Use in Road and Embankment Construction” were some of the technical, environmental and operational requirements for achieving maximum benefits from fly ash in road and embankment construction.

In attendance at the workshop were ash managers, construction and engineering firms, government officials including the Department of Transport and the Ministry of Environment. 

The group examined the many benefits of incorporating fly ash and bottom ash into Portland Cement/Concrete. Extensive research and countless highway and bridge construction projects have indisputably proven the following facts about the use of fly ash in construction:
1. Higher ultimate strength

2. Improved workability

3. Lowered costs

4. Reduced bleeding

5. Reduced heat of hydration

6. Reduced permeability

7. Increased sulfate attack resistance

8. Increased resistance to ASR

9. Reduced shrinkage

10. Increased durability.

AsianCAA hosts and organizes multiple workshops and conferences throughout the year. To find out more about our next event, enter your email below and we will send you more information.