CO2 emissions reduction solutions and potential benefits
Energy Efficiency
Since the 1970s oil crisis, the refining industry in Japan has dealt with rising energy prices and strict regulations by reducing energy consumption and cutting CO2 emissions. Refinery operators have accomplished this by introducing some of the world’s most advanced technologies, and have been supported in this by Yokogawa's systems, solutions, and engineering capabilities.
Yokogawa has been involved in more than 900 refinery projects and has established strong credibility in this industry. The company provides solutions that achieve energy savings through increased efficiency.
Example of potential benefits (approximate annual returns for a 100 kbd refinery)
*The values vary depending on the progress of the activities of customers.
Energy KPI emanagment |
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Energy consumption visualization and key performance indicator (KPI) management To achieve energy savings and reduce CO2 emissions at refineries, the status of emissions and energy consumption must be clearly visualized. Yokogawa provides a comprehensive range of solutions such as field sensors and production management systems that rely on the latest technologies to monitor and manage energy related parameters.
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Reducing excess O2 % in furnace/boiler flue gas |
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Reducing excess O2 % in furnace/boiler flue gas When excess oxygen (O2) is present in flue gas, incomplete combustion is the result. Usually, O2 is kept within 1.5 - 2% of the optimum level; however, it has been shown that laser sensing technology can improve the speed and reliability of CO/O2/CO2 measurement and lead to even further reductions in excess O2, resulting in additional energy savings. Advanced control for atmospheric distillation The fractionator in an atmospheric distillation unit is highly complex and difficult to operate. Yokogawa has an advanced control solution for fractionators that relies on multivariable model predictive control and quality estimation technologies. Advanced control for other types of distillation columns For other types of distillation columns such as stabilizers, splitters, de-ethanizers, de-propanizers, and aromatic (BTX) fractionation units, Yokogawa has a number of advanced solutions for quality estimation control, multivariable model predictive control, and low-pressure control that can improve yield and reduce energy consumption.
There are several hydrodesulfurization processes for removing sulfur from naphtha, kerosene, light gas oil, heavy gas oil, heavy oil, and other fuels. By controlling the upper limit of the standard sulfur value to reduce a reactor’s weight average temperature (WAT), energy savings can be obtained. Optimum operation in catalytic reforming process Catalytic reforming in a reactor unit relies on research octane number (RON) control and maximum charge control as well as WAT control, which is based on the temperature profile of the reactor. This improves yield and saves energy Optimum operation in fluid catalytic cracking (FCC) process Fluid catalytic cracking (FCC) units play an essential role in the production of value-added products. The use of multivariable model predictive control to enhance the operation of the FCC increases the yield of value-added products and realizes energy savings. Operation assistance system for process automation An operation assistance system ensures consistent product quality and reduces operator workload by providing standardized operational procedures based on the expertise of a refinery’s most experienced operators. |
Reductions in tank yard / shipping facility |
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Reductions in tank yard / shipping facility Oil movement automation systems (OMS) improve the efficiency of refinery tank yard and shipping facility operations.
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Optimizing common header balance |
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Reductions in tank yard / shipping facility Optimizing common header balance By optimizing the balance of gas, hydrogen, and steam supply and demand at a refinery's common headers, energy loss can be minimized.
The optimization of operation and control at a BTG plant consisting of multiple boilers, turbines, and electric power generators helps save energy. |
