Showing papers on "Co-processing published in 2004"

Utilizing waste products from the food production and processing industries.

Abstract: Waste in the food industry is characterized by a high ratio of product-specific waste. Not only does this mean that the generation of this waste is unavoidable, but also that the amount and kind of waste produced, which consists primarily of the organic residue of processed raw materials, can scarcely be altered if the quality of the finished product is to remain consistent. The utilization and disposal of product-specific waste is difficult, due to its inadequate biological stability, potentially pathogenic nature, high water content, potential for rapid autoxidation, and high level of enzymatic activity. The diverse types of waste generated by various branches of the food industry can be quantified based on each branches' respective level of production. Moreover; the origins of each type of waste and a tabulated overview of the traditional agricultural methods for reusing the waste are discussed. Additionally, alternative methods of waste management have emerged, which target the most important contents of the waste. In conclusion, new possibilities for the utilization of food industry waste are described.

Waste conversion process

Abstract: A process for the preparation of high quality char from organic waste materials. The waste is first sorted to remove recyclable inorganic materials of economic value (metals, glass) and other foreign materials that would be detrimental to the quality of the final product (stone, sand, construction debris, etc.). After size reduction, the waste is pyrolyzed at a temperature range of 250 to 600°F, in a high capacity, continuous mixer reactor, using in-situ viscous heating of the waste materials, to produce a highly uniform, granular synthetic product similar in energy content and handling characteristics to, but much cleaner burning than, natural coal.

The high-tech research process of industrial solid waste in china

Abstract: The paper presents the status of the industrial waste in China. The theoretical basis of the industrial waste research and development is then discussed and the development of high technical research of industrial waste is introduced to represent the present level of China's utilization of research of industrial wasted.

The high-tech research process of industrial solid waste in china

Abstract: The paper presents the status of the industrial waste in China. The theoretical basis of the industrial waste research and development is then discussed and the development of high technical research of industrial waste is introduced to represent the present level of China's utilization of research of industrial wasted.

Heavy product from co-processing of FCC slurry and coal as bitumen modifier

Abstract: Introduction Co-processing of coal and petroleum resid has been developed to produce liquid fuels, and has gained significant advancements during past several decades. In this work the co-processing process is adopted to produce a bitumen modifier under mild conditions. The modifier is the heavy portion of the co-processing products including un-reacted materials and ash in the coal. Oil is a byproduct. Market price of similar natural occurring modifier is about $500-$750/t in China, which is much higher than the prices of oil and road paving asphalt. Bitumen on road experiences a wide range of static and dynamic stress at varying temperature under different environmental conditions. The lifetime of the road surface is limited due to aging of bitumen in asphalt concrete mix. Addition of non-vulcanized nature and synthetic polymers to improve the properties of paving asphalt are well known and widely used (1, 2). Reclaimed rubber, pulverized waste tire and special naturally occurring asphalt (such as Trinidad lake asphalt) are also used as additives (3, 4). Addition of these materials improves durability of asphalt surface, adhesion of bitumen to aggregate, deformation resistant at great load and freeze resistance. Due to super road performance (4), compared to other additives, Trinidad lake asphalt (TLA) has been used in bitumen modification worldwide. In this study slurry, from fluidized catalytic cracking (FCC) unit, and coal is co-processed. The heavy product, named MCSC (modifier from co-processing slurry and coal), is tested for possible usage on bitumen modification. Modification ability and physical and chemical properties of MCSC are presented and compared with TLA.

Application of Flashing Technology to the Power Generation by Waste Heat

Abstract: A new technology, i.e. steam/hot water flashing compound generating technology, which applies to power generation by medium or low temperature waste gas is introduced. The technology could be used to make full use of low grade heat source to power generation, and it has many characteristics, such as energy conservation, environmental protection, low cost, easy to operation and maintenance. The technology can be widely used to utilize the waste heat in gas-steam combined cycle power set, cement plant and many other trades.