Displaying items by tag: NOx

US: Lehigh Cement and Lehigh White Cement have agreed to an investment of US$12m for the installation of pollution control technology across their 11 active cement plants. US Fed News has reported that the upgrades can be expected to reduce net emissions of nitrous oxised (NO_x) by 4550t/yr and sulphur dioxide (SO₂) by 989t/yr. Lehigh Cement will additionally pay a US$1.3m civil penalty for past Clean Air Act violations.

Germany: HeidelbergCement’s specific CO₂ net emissions per tonne of cementitious material fell by 1.4% year-on-year to 599kg CO2/t in 2018 from 608kg CO₂/t in 2017. Despite this its absolute gross CO₂ emissions increased by 3% to 76.7Mt from 74.2Mt as clinker, cement, aggregate and concrete sales volumes all grew in 2018. The group has published the data in its Sustainability Report for the 2018 financial year.

“Cutting our CO₂ emissions and handling natural resources considerately are priorities for all our business lines,” says Bernd Scheifele, chairman of the managing board of HeidelbergCement. "We focus primarily on the development of sustainable products and the implementation of concrete measures at plant level in order to achieve our sustainability goals.” The company has set itself the target of a 30% reduction in its specific net CO₂ emissions per tonne of cement by 2030, compared with 1990. HeidelbergCement says it intends to realise its vision of CO₂-neutral concrete by 2050 at the latest.

Other figures of note in the report include an alternative fuels substitution rate of 21.7% in 2018 compared in 20.8% in 2017. NO_x, SO_x and particulate matter emissions all fell. However, total water withdrawal rose by 8% to 65.4Mm³ from 60.4Mm³ although water consumption fell.

Ireland: Local environmental activists have accused the Irish Environmental Protection Agency (EPA) of ignoring European Union (EU) NO_x emission limits by granting an exemption to Irish Cement’s Limerick integrated plant. Limerick Against Pollution group alleges that the plant has been allowed a limit of 800mg/m3 despite a EU directive reducing the limit to 500mg/m³, according to the Limerick Post newspaper.

India: The Central Pollution Control Board (CPCB) has issued a show cause notice to Ramco Cement’s Ariyalur plant in Tamil Nadu for breaching air pollution limits. CPCB inspectors found that the particulate matter (PM) and NO_x emissions were higher than allowed during an inspection in March 2019, according to the New Indian Express newspaper. The CPCB has recommended that the unit supplies continuous data transmissions and calibrates of all of its monitors to CPCB Online Continuous Emission Monitoring Systems guidelines.

Germany: Thomas Zement has ordered a selective catalytic reduction (SCR) unit from GEA for its Erwite cement plant to reduce its NO_x emissions. The order includes two reactors for selective catalytic reduction (SCR) including handling of the flue gas transport by induced draft (ID) fans and integration into plant. The contract also includes engineering services as well as the supply, installation and commissioning of steel structures, SCR catalysts, ID fans, heating circuits, duct connection and adaptation of NH₃ injection from existing storage tanks. Production will continue at the site during the installation of the SCR unit.

India: The Central Pollution Control Board (CPCB) has penalised four cement producers in Tamil Nadu for failing to follow emission standards. Chettinad Cement’s plants at Puliyur and Karikkali, Tamil Nadu Cements’ plant at Alangulam, Dalmia Cements’ plant at Salmiapuram and ACC’s plant at Coimbatore have been accused by the Ministry of Environment, Forests and Climate Change for not complying with emission standards for particulate matter, SO_x and NO_x, according to the New Indian Express newspaper. ACC and Dalmia Cements have been fined around US$420/day since 31 August 2018, Chettinad Cement has been fined around US$5000 for a 12 day delay in compliance and Tamil Nadu Cements has been fined over US$23,000 for a delay of 55 days.

Sweden: Yara is simplifying its operating model to three segments from the start of 2019. The change follows its decision to focus its strategy on the crop nutrition market.

Its Sales & Marketing segment will comprise all of Yara's existing Crop Nutrition business units. Former industry segment divisions Base Chemicals, Industry Reagents and Animal Nutrition (excluding South Africa) will also be transferred to it. Its New Business segment will include businesses to establish commercial innovation within decarbonisation and the circular economy, a business for autonomous logistics operations including the Yara Birkeland autonomous electric ship project and a portfolio of businesses to cover Environmental Solutions, Mining Applications, Animal Nutrition South Africa and Industrial Nitrates.

"Earlier this year, we set out our strategy as the crop nutrition company for the future, and we are now adapting and simplifying our operating model accordingly. Following a period of substantial investments, our main focus going forward will be on operational excellence, innovation and growing scalable crop nutrition solutions," said Svein Tore Holsether, president and chief executive officer (CEO) of Yara International.

Yara's offerings to the cement industry include NO_x emissions control products.

US: The US Environmental Protection Agency (EPA) has fined the Nevada Cement Company US$0.5m for violating the Clean Air Act. According to a legal complaint the cement producer made ‘major’ modifications to its plant in Fernley, Nevada that led to significant increased emissions of NO_x, without first obtaining a permit required by the Clean Air Act and without installing necessary pollution control equipment. Nevada Cement has agreed to install new air pollution control technology replace a heavy-duty diesel truck and a diesel railcar mover at the facility with clean emissions vehicles.

Germany: HeidelbergCement has released its seventh Sustainability Report so far. Highlights from the report include a reduction of specific net CO₂ emissions by 22% to 606kg/t of cement (compared to 1990 levels) and a decreased clinker factor of 75%. However, specific emissions for NO_x, SO₂ and mercury all rose slightly from 2014.

“The numbers show what kind of progress HeidelbergCement made in 2015,” said Bernd Scheifele, CEO of HeidelbergCement. “We have also substantially intensified our commitment to the development of technologies to use CO₂ as a resource, and we have entered into very promising cooperative research projects. This puts us at the forefront of the movement in the cement industry.”

The 2015 report is also the first to present data on water management, following the implementation of industry indicators for water reporting at all cement plants in 2013 and 2014.

Canada: Pond Biofuels has set up a bioreactor pilot plant at St Marys cement plant in St Marys, Ontario. The raw smokestack gas from the cement plant is recycled to grow algae in a third-generation 25,000L bioreactor at the on-site pilot plant. The resulting algae can be used for bio-oil, food, fertiliser and sewage treatment.

The algae consume CO₂, NO_X and SO_X from the smokestack gas. Every 1kg of algae produced prevents 2kg of CO₂ from being emitted into the atmosphere. The St Marys Cement Plant produces 720,000t/yr of cement and 540,000t/yr of CO₂. Currently, Pond Biofuels only uses a small portion of the total CO₂ output.

"We consider ourselves a carbon recycling technology," said Steve Martin, founder of Pond Biofuels.

The algae thrive in light filled, CO₂-rich conditions, which are provided in the bioreactor. The light comes from custom-designed red LED lights that flash continuously. The rapid flashing fools the algae into thinking the days are very short, so it grows very fast. "The algae evolve quite quickly; we can get four, five, six generations of algae in a day," said Martin.

Proving the production of algae at commercial scale is important, but the other important part is finding a market for the algae. "Between 10 – 20% of it is oil that be used for producing biodiesel," said Martin. It could also be used a coal replacement, a soil amendment or even animal feed and it can be easily dried using waste heat from the cement plant.