
Compression of air creates heat; the air is warmer after compression. Expansion removes heat. If no extra heat is added, the air will be much colder after expansion. If the heat generated during compression can be stored and used during expansion, then the efficiency of the storage improves considerably. There are several ways in which a CAES system can deal with heat. Air storage can be , diabatic, , or near-isothermal. [pdf]

The inputs and outputs from the process simulation were normalized for 1 kg cobalt sulfate (0.21 kg cobalt). The LCI data for the sub-systems described in Fig. 1—mining, base metal refining, Co refining, and Au refining—are presented in Table 3. The Finnish electricity grid mix was used to represent electricity and heavy. . The results are shown in Fig. 2 for each of the process steps (mining, base metal refining, Co refining, and Au refining). The overall GWP value was. . The significance of uncertainty related to the process parameters was investigated by conducting a sensitivity analysis with respect to the hydrometallurgical process. The effects of changing. [pdf]
A life cycle assessment was performed based on ISO 14040 to evaluate the potential environmental impact and recognize the key processes. The system boundary of this study contains four stages of cobalt sulfate production: mining, beneficiation, primary extraction, and refining.
The system boundary of this study is described as all activities within the cobalt sulfate production process (Fig. 1). “Cradle-to-gate” LCA research includes all relevant life cycle stages from ore mining to beneficiation, primary extraction, and refining processes.
This paper builds a comprehensive inventory to support the data needs of downstream users of cobalt sulfate. A “cradle-to-gate” life cycle assessment was conducted to provide theoretical support to stakeholders. A life cycle assessment was performed based on ISO 14040 to evaluate the potential environmental impact and recognize the key processes.
The system boundary of this study contains four stages of cobalt sulfate production: mining, beneficiation, primary extraction, and refining. Except for the experimental data used in the primary extraction stage, all relevant data are actual operating data.
An LCA analysis was conducted on cobalt sulfate production to evaluate the environmental burden of cobalt refining, including mining, beneficiation, primary extraction, and refining phases.
Research found that cobalt-dependent technologies face a limitation on cobalt supply concentration due to the increased lithium-ion battery demand (Fu et al. 2020). This situation forces global battery manufacturers to seek new cobalt alternative materials or reduce the use of cobalt.

On 15 October 2024, a fuel tanker exploded in Majiya, Jigawa State, Nigeria, killing 209 people and injuring 124 others. The involved tanker came from Kano and had driven around 110 kilometers on its way to Yobe State on 15 October. While traveling on an expressway near the town of Majiya in Jigawa State, the tanker. . 167 families were affected by the explosion and the property damage cost millions of Naira. Haruna Mairiga, the head of the Emergency Management Agency in Jigawa State, said that a. . • • • [pdf]
(AP Photo/Sani Maikatanga) ABUJA, Nigeria (AP) — Nigerian authorities have announced measures to correct lapses that resulted in the deaths of more than 140 people in an explosion on Wednesday as they were trying to scoop up fuel from an overturned fuel tanker in one of the deadliest road accidents ever in the West African nation.
At least 70 people were killed and more injured in northern Nigeria on Saturday when a petrol tanker truck overturned, spilling fuel that exploded, the country's national emergency agency said.
Survivors and relatives try to find peace after 170 mostly young people died after a tanker exploded in Jigawa State. People prepare bodies for burial on Wednesday, October 16, 2024 following a tanker explosion in Majia town, Nigeria [Sani Maikatanga/AP Photo]
Fuel tanker explosions are not unusual in Africa’s most populous country, where oil supplies are frequently dispatched by road. Previous fires have led to multiple casualties. In 2020, more than 500 people lost their lives in more than 1,500 fuel tanker accidents recorded that year, according to Nigeria’s road safety agency.
REUTERS/Tife Owolabi Acquire Licensing Rights WARRI, Nigeria/LONDON, Feb 4 (Reuters) - An oil vessel used for storage that exploded off the coast of Nigeria this week had not been maintained for sometime and had technical issues, two sources and an environmental group said on Friday, as its wreckage lay in the sea after the fire was put out.
People gather near the remains of a fuel tanker that exploded in Majia, Nigeria [Ali Rabiu Ali/Al Jazeera] “Those that were injured are being taken care of in various hospitals across the state and neighbouring state,” Abdullahi said, thankful to those who provided help.
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