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Wednesday, July 22, 2020 | History

2 edition of Research studies for producing liquids by short residence coal hydropyrolysis found in the catalog.

Research studies for producing liquids by short residence coal hydropyrolysis

Marvin I Greene

Research studies for producing liquids by short residence coal hydropyrolysis

by Marvin I Greene

  • 288 Want to read
  • 37 Currently reading

Published by Dept. of Energy, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English

    Subjects:
  • Pyrolysis,
  • Coal liquefaction

  • Edition Notes

    Statementprepared by Marvin I. Greene
    ContributionsUnited States. Dept. of Energy, Cities Service Research & Development Company
    The Physical Object
    Paginationv. :
    ID Numbers
    Open LibraryOL14879333M

      Marker TL, Felix LG, Linck MB () Producing liquid product, comprises hydropyrolyzing biomass to form e.g. hydropyrolysis liquid and char, removing char, hydroconverting liquid to e.g. gaseous mixture and steam reforming to form hydrogen, and introducing hydrogen to reactor. US patent A1; WOA1. The Direct Benefits of Coal-to-Liquids Production Beyond the strategic benefits for the nation associated with coal-to-liquids production are certain direct benefits. If coal-derived liquid fuels can be produced at prices well below world oil prices, then the private firms that invest in coal-derived liquid fuels development could garner economic.

    The vapour residence time can be around 5–30 min in this process. The volatile organic fractions present in vapour phase continue to react with each other to yield char and some liquid fractions. The quality of bio‐oil produce in this process is very low. Longer residence time initiates further cracking to reduce the yield of bio‐oil. This research task aims to establish a coal-compatible biomass feedstock depot capable of delivering enough fuel to completely convert a coal power plant to biomass. The program has two main thrusts: (1) pretreatment technology for converting biomass into a drop-in replacement for coal and (2) logistics research to address biomass supply chain.

    R. Agrawal, N. R. Singh, System and Process for Producing Synthetic Liquid Hydrocarbon, US / A1, WO//; R. Agrawal, M. Agrawal, N. R. Singh, Novel Process for Producing Liquid Hydrocarbon by Pyrolysis of Biomass in presence of Hydrogen from a Carbon-Free Energy Source. US / A1, WO// Fundamental Understandings of Fast-Hydropyrolysis to Reduce Bio-Oil Complexity Thermal treatments deconstruct biomass into an array of liquid and gaseous products along with residual char. However, bio-oil resulting from pyrolysis has an extremely high oxygen content (35 to 40% by weight), is unstable over time, and its energy content is barely.


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Research studies for producing liquids by short residence coal hydropyrolysis by Marvin I Greene Download PDF EPUB FB2

Research studies for producing liquids by short residence coal hydropyrolysis. [Washington]: Dept. of Energy ; Springfield, Va.: For sale by the National Technical Information Service, Research studies for producing liquids by short residence time coal hydropyrolysis.

Monthly progress report, October A fundamental study of the hydropyrolysis of small coal particles at high pressures and short residence times of both solid and gas is underway to elucidate the chemical and physical rate processes governing the yield.

Research studies for producing liquids by short residence coal hydropyrolysis / By Marvin I. Greene, Cities Service Research & Development Company.

and United States. Department of Energy. Abstract. Issued Mar. Prepared by Cities Service Research & Development Company, Cranbury, N. J., for the United States Department of Energy, under. It was used at the Coal Research Establishment (British Coal) for investigating the production of benzene, toluene and xylenes (“BTX”) during hydropyrolysis.

‘Hot-rod’ reactors are best known from the work of Hiteshue and co-workers at the U.S, Bureau of Mines [,a, b] who conducted coal hydropyrolysis experiments at. Research studies for producing liquids by short residence time coal hydropyrolysis.

Monthly progress report, October selectivities during hydropyrolysis at the above operating severity vary with both rank of coal and seam from which the coal is mined. Operability of hydropyrolysis reactors under ''liquefaction'' conditions (/sup 0.

Marvin I Greene has written: 'Research studies for producing liquids by short residence coal hydropyrolysis' -- subject(s): Pyrolysis, Coal liquefaction. Coal partial hydropyrolysis process aims at co-production of high yield of light oil and synthesis gas from a low rank coal under a mild hydropyrolysis condition.

The characteristic of this process is in the hydropyrolysis reactor composed of the re-former and gasifier. So far, in order to evaluate the process concept a small-scale. The volatile liquid was cooled and separated in two condensers, one an ice-cooled trap Fuel Volume 75 Number 12 Flash hydropyrolysis of northern Chinese coal: Zibin Zhu et al.

Table 1 Proximate and ultimate analyses of coals (wta db) Coal ZL DS Proximate analysis Ash 12 VM FC U Ultimate analysis C In a recent study, Finn et al. (ref. ) used a two-seg­ ment tube to implement independent temperature control of solids and volatiles while achieving heating times as short as half a minute.

A schematic of the apparatus used by Finn et al. is shown in Fig. Coal was placed in an 8 cm long bed in the hydropyrolysis section and subjected to a.

Get homework help fast. Search through millions of guided step-by-step solutions or ask for help from our community of subject experts 24/7. Try Chegg Study today.

Study of coal hydropyrolysis and desulfurization by ReaxFF molecular dynamics simulation Wang Haijuna, Feng Yanhuia,b,⇑, Zhang Xinxina,b, Lin Weia, Zhao Yonglianga a School of Mechanical Engineering, University of Science and Technology Beijing, BeijingChina bBeijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry, University of Science.

The aim of this research is to study the liquid-liquid extraction process of the major components of coal tar and to generalise the results of experiments by correlating the data of liquid-liquid. Coal and Biomass: The Study of Solid Fuels and their Utilisation Chapter 2.

Fossil Fuels: Origins and Characterisation Methods Chapter 3. Pyrolysis: Thermal Breakdown of Solid Fuels in a Gaseous Environment Chapter 4. High-Pressure Reactor Design and Applications: Pyrolysis, Hydropyrolysis and Gasification Chapter 5. Biomass pyrolysis and hydropyrolysis have been studied in a high-temperature, high-pressure fluidized bed reactor system.

The reactor system can be operated at reaction temperatures up to °C ( °F) and pressures up to 4 MPa ( psi). Baseline biomass pyrolysis experiments with an inert heat transfer material were conducted at various pressures and hydrogen partial pressures to.

SHORT RESIDENCE HYDROPYROLYSIS FOR COALS. Studies of coal liquefaction by short-residence-time hydropyrolysis using promoters. McCoy [ ] W. Fling. A bench-scale short. Catalytic hydropyrolysis of loblolly pine was studied in a high-pressure fluidized bed reactor using a NiMo hydrotreating catalyst.

Hydropyrolysis temperature (– °C) influenced the product distribution, product composition, H2 consumption, and process carbon efficiency. The material balances ranged from 84% to % with an average of 91%.

HEAVY OILS BY HYDROPYROLYSIS Kent E. Hatfield* and Alex Oblad** The primary separation technique for the production of synthetic fuels from such sources as oil shale, tar sand, and black oils, produces a hydrocarbon liquid that is similar in properties to the heavier fractions of crude oil or heavy crudes.

Extensive processing of these materials is. This thesis\ud comprises a study of the behaviour of coal under the conditions pertinent to those\ud envisaged within a commercial hydropyrolysis process, that is, using pulverised coal,\ud a short coal-reactor residence time, high hydrogen pressure and high heating rate.

For\ud this purpose, an electrically heated grid apparatus has been used. The pyrolysis of coal is a good method for producing liquid fuels and other chemicals; however, the yields of these products are limited due to low content of hydrogen in coal.

Hydropyrolysis, a pyrolysis process under hydrogen, is an effective method to improve tar yield and quality, but high cost of pure hydrogen hinders its industrial. A model for short residence time hydropyrolysis of single coal particles.

William B. Russel. Department of Chemical Engineering, Princeton University, Princeton, New Jersey Cities Service Research and Development Company, Cranbury, New Jersey Too Short Weak Medium Strong Very Strong Too Long.

Password Changed Successfully. Production of fuels and chemicals from coal is becoming attractive due to potential high cost and uncertain supply of crude petroleum oil. Conventional techniques of coal liquefaction, though technically feasible, have been expensive due to hydrogen requirements, high pressure equipment, and high cost of commercial supported catalysts.

In this study, a novel technique for rapid hydropyrolysis. The influence of highly dispersed iron-containing catalysts on the process characteristics of the hydrogenation (in tetralin) and hydropyrolysis of B2 brown coal and D and G black coals and the hydropyrolysis of brown coal and polyolefin mixtures was studied.

The composition of the resulting liquid products was investigated by a GC-MS technique.Solid Fuels and Heavy Hydrocarbon Liquids: Thermal Characterisation and Analysis, Second Edition integrates the developments that have taken place since publication of the first edition in This updated material includes new insights that help unify the thermochemical reactions of biomass and coal, as well as new developments in analytical techniques, including new applications in size.