Displaying items by tag: SOx

Spain: Cementos Molins has committed to a 20% reduction in its CO₂ emissions between 2020 and 2030. The company has set out its strategy in its 2030 Sustainability Roadmap. The roadmap covers five areas: health and safety, energy and climate change, the circular economy, nature and the environment, and corporate social responsibility. Thus, Cementos Molins aims to achieve an accident-free workplace, to source 55% of its electricity consumption renewably, to increase its alternative fuel (AF) substitution rate to 40% and reduce its cement’s clinker factor to 68%, to halve particulate matter emissions and cut nitrous oxides (NO_x) and sulphur oxides (SO_x) emissions by 40% and 10% respectively and to have signed official agreements with all host communities and employ women in over 23% of management positions.

Chief executive officer Julio Rodríguez said “Sustainability is the cornerstone of our strategy here at Cementos Molins, and today we are delighted to announce the specific targets that we have set out in our 2030 Sustainability Roadmap. The targets and their corresponding action plans - the result of the hard work and dedication of the Cementos Molins team, together with our stakeholders – will help drive our company forward in actively tackling climate change.” He added “We are deeply committed to achieving zero emissions and building a better world for everyone.”

China: Henan Province has announced a planned rise in water and energy tariffs for cement producers that fail to meet current emissions standards and clean transportation requirements. Reuters News has reported that companies subject to the measures will pay US$0.07 – US$0.14/m3 more for water and up to US$0.01/kWh more for electricity. Henan enacted ‘ultra-low’ emissions limits of 10Mg/Nm³ of dust, 50Mg/Nm3 of NO_x and 100Mg/Nm³ of SO₂ in 2018. Cement plants in the province produce 105Mt/yr of cement.

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.

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.

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.