Marsden Level Refinery

The Marsden Level Refinery was inbuilt 1964 and is positioned about 40km from Whangarei, New Zealand. It’s the country’s solely refinery and is operated by The brand new Zealand Refining Firm (NZRC).

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Marsden Level was selected as the situation of the refinery due to the availability of a deepwater harbour and the area’s low earthquake threat. As well as, the harbour was close to some of the key North Island markets. Vital amount of land was also accessible close to the location.

The refinery processes 35 million tonnes of crude oil annually and supplies eighty% of recent Zealand’s fuel products. Major oil firms including BP, Chevron, Mobil and Aotea Energy are share homeowners in the refinery.

Marsden Point development and infrastructure

Previous to the construction of the Marsden Point Refinery the required fuel merchandise were imported into New Zealand by oil corporations. With rising gas costs the government proposed the construction of a new refinery in 1956. Building began in 1962 and required an funding of NZ$1.84bn.

Within the mid-1980s the refinery was expanded to extend its production capability with an investment of $1.8bn. The growth added a hydrocracker unit, storage tanks, environmental therapy units and other facilities to the refinery. A $180m improve programme known as Future Fuels Challenge was accomplished in 2005. It enabled the refinery to take away sulphur from diesel and benzene from petrol. Completion of the challenge helped the refinery supply cleaner fuels to the new Zealand market.

In 2005 NZRC launched a $190m expansion programme, known as Point Ahead Mission, for the refinery. The enlargement began in January 2008 and was accomplished in July 2010.

The growth increased the manufacturing capacity of the refinery by 15% to 135,000 barrels per day from 106,500 barrels per day. It was undertaken to fulfil the rising demand for gasoline products in New Zealand, which is projected to increase over the subsequent 20-30 years.

The growth undertaking eliminated bottlenecks at the crude distillation unit, modified the heat exchangers, added bigger vessels and furnaces pumps to the refinery. New kerosene stripper and pre-flash drums had been additionally added. The pipe works of the refinery had been additionally upgraded to handle the increased output.

Contractors and processing

WorleyParsons, Shell and UOP carried out the entrance-end engineering and design (FEED) for the enlargement venture. A 3D digital mannequin of the challenge was created at WorleyParsonsengineering manufacturing centre at Beijing.

The refining process at Marsden Level contains three steps – separation, conversion and purification. In step one, crude oil is separated into different hydrocarbons together with refinery gasoline, petrol, kerosene, light and heavy fuel oils, and long residue. Separation is carried out utilizing distillation course of.

The refinery gasoline obtained via separation is converted into hydrogen sulphide using the Shell ADIP course of, which includes reacting refinery gasoline with an answer of diisopropanol amine. The long residue is processed within the butane deasphalting unit to provide petrol and asphaltic compounds. Within the second step sulphur is removed from the petrol, kerosene and gentle and heavy fuel oils utilizing the desulphurisation course of. After this process chemical conversions processes resembling catalytic reforming and hydrocracking are used to acquire the desirable compounds.

The third step includes purification of the hydrogen sulphide and naphtha obtained after the first two steps. Purified naphtha and hydrogen sulphide are later blended with the other hydrocarbons for sale.

Marsden output

The Marsden Level refinery produces premium and common petrol, diesel, automotive fuels and kerosene for the brand new Zealand market. It also produces jet gas, fuel oils (LFO, HFO and HBFO) and bitumen.

Pipeline route

During the refinery’s expansion in the 1980s, a 170km pipeline referred to as Refinery to Auckland Pipeline (RAP) was built. The pipeline carries half of the refinery’s production to Wiri in South Auckland where it’s saved and later distributed by highway.

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