The Experts below are selected from a list of 125544 Experts worldwide ranked by ideXlab platform
Carmen Barriocanal - One of the best experts on this subject based on the ideXlab platform.
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feedstock recycling of plastic wastes oil mixtures in cokemaking
Fuel, 2009Co-Authors: M A Diez, Sonia Melendi, R Alvarez, Carmen BarriocanalAbstract:Two lubricating oils, a plastic waste composed mainly of polyolefins (95%) and their mixtures (1:1 w/w) were assessed for possible use as minor components of coal blends for metallurgical coke production. The addition of 2 wt% plastic waste causes a decrease in the maximum fluidity of the coal developed during thermal heating between 400 and 500 °C. At the same addition rate, the two oils are good additives for mixing with coal/plastic blends in order to partially restore the caking ability of the co-carbonizing systems. Co-carbonizations of the Coking blend with the different wastes were carried out in a movable wall oven of 15 kg capacity. Although the bulk density remained unchanged, the addition of the plastic waste produced an increase in Coking pressure to values that were too high for it to be considered as a safe blend. At the same time the mechanical strength of the partially gasified coke was improved as reflected by the CSR index. The oils, however, had the effect of reducing bulk density and the Coking pressure generated during the process. When blended with the coal and the plastics, the oils appeared to act as good solvents of the polyolefins and also proved to be effective in decreasing Coking pressure without negatively affecting coke quality.
M A Diez - One of the best experts on this subject based on the ideXlab platform.
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feedstock recycling of plastic wastes oil mixtures in cokemaking
Fuel, 2009Co-Authors: M A Diez, Sonia Melendi, R Alvarez, Carmen BarriocanalAbstract:Two lubricating oils, a plastic waste composed mainly of polyolefins (95%) and their mixtures (1:1 w/w) were assessed for possible use as minor components of coal blends for metallurgical coke production. The addition of 2 wt% plastic waste causes a decrease in the maximum fluidity of the coal developed during thermal heating between 400 and 500 °C. At the same addition rate, the two oils are good additives for mixing with coal/plastic blends in order to partially restore the caking ability of the co-carbonizing systems. Co-carbonizations of the Coking blend with the different wastes were carried out in a movable wall oven of 15 kg capacity. Although the bulk density remained unchanged, the addition of the plastic waste produced an increase in Coking pressure to values that were too high for it to be considered as a safe blend. At the same time the mechanical strength of the partially gasified coke was improved as reflected by the CSR index. The oils, however, had the effect of reducing bulk density and the Coking pressure generated during the process. When blended with the coal and the plastics, the oils appeared to act as good solvents of the polyolefins and also proved to be effective in decreasing Coking pressure without negatively affecting coke quality.
Kenji Kato - One of the best experts on this subject based on the ideXlab platform.
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The mechanism of Coking pressure generation II: Effect of high volatile matter Coking coal, semi-anthracite and coke breeze on Coking pressure and contraction
Fuel, 2010Co-Authors: Merrick R. Mahoney, Seiji Nomura, Kenji Kato, Koichi Fukuda, D.r. Jenkins, Sid McguireAbstract:Abstract One of the most important aspects of the cokemaking process is to control and limit the Coking pressure since excessive Coking pressure can lead to operational problems and oven wall damage. Following on from a previous paper on plastic layer permeability we have studied the effect of contraction of semi-coke on Coking pressure and the effect of organic additives on contraction. A link between contraction (or simulated contraction) outside the plastic layer and Coking pressure was demonstrated. The interaction between this contraction, local bulk density around the plastic layer and the dependence of the permeability of the plastic layer on bulk density was discussed as possible mechanisms for the generation of Coking pressure. The effect of blending either a high volatile matter coal or one of two semi-anthracites with low volatile matter, high Coking pressure coals on the Coking pressure of the binary blends has been explained using this mechanism.
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coal blending theory for dry coal charging process
Fuel, 2004Co-Authors: Seiji Nomura, Takashi Arima, Kenji KatoAbstract:Nippon Steel has successfully developed dry coal charging processes such as CMC and DAPS for cokemaking. In this report, the fundamental aspects of the coal blending theory for dry coal charging processes are investigated. The investigation has made it clear that even in cases of high coal bulk density due to dry coal charging processes, it is possible to control Coking pressure by adjusting the blending ratio of a slightly caking and low rank coal; and it is also possible to produce high quality coke by adjusting the total dilatation of the blended coal at a suitable level.
Gale R Watson - One of the best experts on this subject based on the ideXlab platform.
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low vision in the geriatric population rehabilitation and management
Journal of the American Geriatrics Society, 2001Co-Authors: Gale R WatsonAbstract:: Older persons represent the fastest growing segment of individuals with visual impairments in industrialized countries. This population is expected to grow dramatically in the coming years. This article discusses the common age-related changes in vision and the most prevalent visual impairments associated with aging, and the resulting functional implications. It includes information for health care professionals about preparing an older person to benefit from low-vision rehabilitation services, environmental evaluations and modifications, and orientation to the environment. The importance of functional assessment and instruction in the use of visual skills and vision devices is stressed. The article also emphasizes the need for teamwork to provide a full scope of rehabilitation services to older adults with low vision, and the importance of support by family members and caregivers to maximize coping, adjustment, independence and quality of life.
R Alvarez - One of the best experts on this subject based on the ideXlab platform.
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feedstock recycling of plastic wastes oil mixtures in cokemaking
Fuel, 2009Co-Authors: M A Diez, Sonia Melendi, R Alvarez, Carmen BarriocanalAbstract:Two lubricating oils, a plastic waste composed mainly of polyolefins (95%) and their mixtures (1:1 w/w) were assessed for possible use as minor components of coal blends for metallurgical coke production. The addition of 2 wt% plastic waste causes a decrease in the maximum fluidity of the coal developed during thermal heating between 400 and 500 °C. At the same addition rate, the two oils are good additives for mixing with coal/plastic blends in order to partially restore the caking ability of the co-carbonizing systems. Co-carbonizations of the Coking blend with the different wastes were carried out in a movable wall oven of 15 kg capacity. Although the bulk density remained unchanged, the addition of the plastic waste produced an increase in Coking pressure to values that were too high for it to be considered as a safe blend. At the same time the mechanical strength of the partially gasified coke was improved as reflected by the CSR index. The oils, however, had the effect of reducing bulk density and the Coking pressure generated during the process. When blended with the coal and the plastics, the oils appeared to act as good solvents of the polyolefins and also proved to be effective in decreasing Coking pressure without negatively affecting coke quality.