Correlation of microautoclave and 1H n.m.r. measurements of coal liquefaction solvent quality

Winschel, R.A.; Robbins, Gary A.; Burke, F.P.

doi:10.1016/0016-2361(86)90044-x

Cited by 33 publications

(11 citation statements)

References 9 publications

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“…SFIO plus added DMDS demonstrated particular ability to mobilize gaseous hydrogen. Even in the absence of added DMDS, SFIO liquefaction results evidence that the high surface area SFIO has activity for coal dissolution at concentrations down to 3000 ppmw Fey but hydrogenation activity is quite [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] low and the yield of THF soluble-pentane insoluble products increases. Carbon black used alone showed no catalyst activity, either in product yield structure or hydrogen consumption.…”

Section: Resultsmentioning

confidence: 99%

“…Both THF and pyridine extraction of the water-insoluble products show that the highest solubilities are observed in samples pretreated at high CO pressures. In each case the pyridine solubility is significantly higher than for THF ( Table 9- 13). The increase in solubility over that of the raw coal indicates…”

Section: -32mentioning

confidence: 89%

“…Although the authors concluded a significantly lower activity for NaOH, their data show similar H2/CO+C02 ratios for all three salts suggesting they are essentially equivalent. Interestingly, the composition of the aqueous phase, which was [8][9][10][11][12][13][14][15][16] determined after evaporating off the water, appeared to be quite siinilar regardless of the starting salts. They report that when Na,C03 was used, CO displaced the C03,-ion quite readily to form formate, even at 200 O C where the water-gas-shift reaction does not occur.…”

Section: Hydrothermal Treatment With Comentioning

confidence: 99%

“…The resulting product has been reported to be substantially depolymerized and more reactive in addition to being more soluble than the starting It also was enriched in hydrogen and had reduced oxygen content. Conversion of the pretreated coal to distillate products has been reported to be more facile than the starting coal Unquestionably, the initial salt, its composition, its initial concentration, the temperature of the [8][9][10][11][12][13][14][15][16][17][18][19][20] reaction and the pressure of CO, H2, and C02 in the reaction all impact on this reaction. Even though the shift reaction is limited at temperatures below the critical temperature of water, whether this affects the H-donor activity remains undefined.…”

Section: Products From Hydrothermal Processingmentioning

confidence: 99%

“…Unquestionably, the initial salt, its composition, its initial concentration, the temperature of the [8][9][10][11][12][13][14][15][16][17][18][19][20] reaction and the pressure of CO, H2, and C02 in the reaction all impact on this reaction. Even though the shift reaction is limited at temperatures below the critical temperature of water, whether this affects the H-donor activity remains undefined.…”

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confidence: 99%

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Advanced direct liquefaction concepts for PETC generic units. Final report, Phase I

1995

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DEAC22-91PC91040i DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process. or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. 6-4 Liquefaction Experiments6-6 The Water-Gas-Shift Reaction in Absence of Coal Hydrothermal Reaction of Coal Solubility Characteristics of Products 6-7 6-8 6-9 6-9 6-10 6-13 6-20 6-21 7-1 7-2 7-2 7-5 7-5 7-7 7-7 7-8 7-8 7-8 7-9 7-9 7-10 7-11 9-10 9-12 9-24 9-35 9-37 9-41 9-41 9-46 9-52 9-52 9-54 9-54 9-70 9-71 9-73 9-73 9-76 9-79 10-1 10-3 10-4 10-4 10-6 10-6 10-6 10-7 10-8 10-8 10-13 11-1 11-3 11-5 11-6 11-6 11-1 1 11-16 11-16 11-20 11-25 August 1991. Although there had been significant advances both in improving the technology for converting coal to liquid fuels as well as improving the economics, the cost was still far greater than for fuels produced from petroleum. The advanced 2-stage liquefaction technology that was developed at Wilsonville over the past 10 years has contributed significantly toward decreasing the cost of producing liquids from coal to about $33/bbl. It remains, however, the objective of DOE to further reduce this cost to a level more competitive with petroleum based products. This project, among others, was initiated to investigate various alternative approaches to develop technologies that might ultimately lead to a 25% reduction in cost of product.In this project a number of novel concepts were investigated, either individually or in a coupled configuration that had the potential to contribute toward meeting the DOE goal. The concepts included mature technologies or ones closely related to them, such as coal cleaning by oil agglomeration, fluid coking and distillate hydrotreating and dewaxing. Other approaches that were either embryonic or less developed were chemical pretreatment of coal to remove oxygen, and dispersed catalyst development for application in the 2-stage liquefaction process.This report presents the results of this project. It is arranged in four sections which were prepared by participating organizations responsible for that phase of the project. A summary of the overall project and the principal results are given in this section. First, however, an overview of the process economics and the process concepts that were developed during the course of this program is presented. Base Case Assessment -I;DP ASSOCIATESA technical assessment of the test results from this program was developed by comparing the new process concepts dev...

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Section: Resultsmentioning

confidence: 99%

Section: -32mentioning

confidence: 89%

Section: Hydrothermal Treatment With Comentioning

confidence: 99%

Section: Products From Hydrothermal Processingmentioning

confidence: 99%

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confidence: 99%

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