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SRC

A flow diagram of the solvent-refined coal or SRC process is shown ia Figure 12. Coal is pulverized and mixed with a solvent to form a slurry containing 25—35 wt % coal. The slurry is pressurized to ca 7 MPa (1000 psig), mixed with hydrogen, and heated to ca 425°C. The solution reactions are completed ia ca 20 min and the reaction product flashed to separate gases. The Hquid is filtered to remove the mineral residue (ash and undissolved coal) and fractionated to recover the solvent, which is recycled. [Pg.90]

Two pilot plants have been built and operated to demonstrate the feasibiHty of the SRC process. These iacluded a 6 t/d plant at Wdsonvihe, Alabama (p de infra) and a 50 t/d plant at Ft. Lewis, Washington which was operated from 1974 to 1981. [Pg.90]

In an effort to obtain higher value products from SRC processes, a hydrocrackiag step was added to convert resid to distillate Hquids. The addition of a hydrocracker to the SRC-I process was called nonintegrated two-stage Hquefaction (NTSL). The NTSL process was essentially two separate processes ia series coal Hquefaction and resid upgrading. NTSL processes were iaefficient owiag to the inherent limitations of the SRC-I process and the high hydrocracker severities required. [Pg.90]

Properties. The properties of the Hquid fuel oil produced by the SRC-II process are iafluenced by the particular processiag coafiguratioa. However, ia geaeral, it is an oil boiling between 177 and 487°C, having a specific gravity of 0.99—1.00, and a viscosity at 38°C of 40 SUs (123). Pipeline gas, propane and butane (LPG), and naphtha are also recovered from an SRC-II complex. [Pg.90]

Initial operation at the Wilsonville pilot plant was ia SRC-I mode and later evolved iato a two-stage process (129) by operation ia NTSL mode. NTSL limitations described previously combiaed with high hydrogen consumptions resulted ia subsequent focus on a staged iategrated approach, which was to be the basis for all further studies at Wilsonville. [Pg.92]

B. K. Schmid and D. M. Jackson, "The SRC-11 Process," paper presented at Third Annual International Conference on Coal Gasification and Eiquefaction. University of Pittsburgh, Aug. 3—5, 1976 D. M. Jackson and B. K. Schmid, "Production of Distillate Fuels by SRC-11," paper presented at ACS Div. of Ind. and Eng. Chem. Symposium, Colorado Spriags, Col., Feb. 12,1979. [Pg.99]

In the SRC work, coal was slurried with a process-derived anthracene oil and heated to 400—455°C at 12.4—13.8 MPa (1800—2000 psi) of hydrogen for 0—1 h. A viscous Hquid was extracted. The product stream contains some hydrocarbon gases, and H2S. The residue is gasified to generate hydrogen for the process. The remaining filtrate is separated into solvent, which is recycled, and SRC, a low ash, tadike boiler fuel. [Pg.237]

Heating value of the product (SRC) is ca 37 MJ/kg (16,000 Btu/lb). Sulfur contents have been reduced from 2—7% initially to 0.9% and possibly less. Ash contents have been reduced from 8—20% to 0.17% (102). These properties permit compliance with EPA requirements for SO2 and particulate emissions. The SRC is primarily intended to be used as a boiler fuel in either a soHd or molten form (heated to ca 315°C). The soHd has a Hardgrove index of 150 (103). Boiler tests have been successfully carried out using a utiHty boiler. [Pg.237]

Solvent Refined Coal Process. Work ia the mid-1960s by the Speacer Chemical Co. (9) and dating the 1970s by the Gulf Chemical Corp. led to two solvent refined coal (SRC) processiag schemes SRC-I for productioa of low ash soHd boiler fuels and SRC-II for distillates, eg, "syn-cmde."... [Pg.280]

The SRC-II process, shown in Figure 2, was developed in order to minimise the production of soHds from the SRC-I coal processing scheme. The principal variation of the SRC-II process relative to SRC-I was incorporation of a recycle loop for the heavy ends of the primary Hquefaction process. It was quickly realized that minerals which were concentrated in this recycle stream served as heterogeneous hydrogenation catalysts which aided in the distillate production reactions. In particular, pyrrhotites, non stoichiometric iron sulfides, produced by reduction of iron pyrite were identified as being... [Pg.281]

A yield comparison between the products of the SRC-I and SRC-II processes operating on a high volatile Kentucky bituminous coal is... [Pg.282]

Changing process configuration to SRC-II was successful in producing about 50% additional oil. However, a large increase in light hydrocarbon gas make accompanied this increase with an attendant reduction in hydrogen utilization efficiency, and problems persisted using coals other than Kentucky 9/14. [Pg.282]

Solvent-Refined Coal (SRC) This processing concept was initiated by the Pittsburgh Midway Coal Mining Co. in the early 1960s. The SRC-I process operating mode is designed to produce a solid fuel for utility applications. Typical operating conditions and product yields for SRC-I are shown in Table 27-14. [Pg.2373]

Figure 13.26 Schematic diagram of the SH2 domain from the Src tyrosine kinase with bound peptide. The SH2 domain (blue) comprises a central p sheet surrounded by two a helices. Three positively charged residues (green) are involved in binding the phosphotyrosine moiety of the bound peptide (red). (Adapted from G. Waksman et al.. Cell 72 779-790, 1993.)... Figure 13.26 Schematic diagram of the SH2 domain from the Src tyrosine kinase with bound peptide. The SH2 domain (blue) comprises a central p sheet surrounded by two a helices. Three positively charged residues (green) are involved in binding the phosphotyrosine moiety of the bound peptide (red). (Adapted from G. Waksman et al.. Cell 72 779-790, 1993.)...
The Src SH2 domain typifies a large number of those characterized to date. The pTyr fits into a pocket on the opposite side of the central sheet to the pY-r3 pocket (Figure 13.27a). All known SH2 domains bind pTyr in essentially the same way, but some have a different pattern of contacts for the residues that follow. For example, in the Grb2 SH2 domain, a tryptophan side chain from the small sheet fills the pY-r3 pocket, and the bound peptide takes a different course, with important interactions to an asparagine at pY-r2. Screens of peptide libraries have detected the importance of this asparagine. The SH2 domain from PFC-yl contacts five mainly hydrophobic residues that follow pTyr. [Pg.274]

The peptide-binding site is a hydrophobic groove flanked by the RT loop between pi and p2 and the n-Src loop between p3 and P4 (see Figure 13.28a). The latter is so named because neuronal Src has an insertion of six residues in this loop. The groove is lined with conserved aromatic residues. [Pg.274]


See other pages where SRC is mentioned: [Pg.381]    [Pg.163]    [Pg.527]    [Pg.90]    [Pg.462]    [Pg.283]    [Pg.237]    [Pg.237]    [Pg.280]    [Pg.281]    [Pg.281]    [Pg.281]    [Pg.282]    [Pg.282]    [Pg.282]    [Pg.282]    [Pg.285]    [Pg.2357]    [Pg.2372]    [Pg.2373]    [Pg.2375]    [Pg.53]    [Pg.624]    [Pg.271]    [Pg.272]    [Pg.272]    [Pg.272]    [Pg.273]    [Pg.273]    [Pg.274]    [Pg.274]    [Pg.274]    [Pg.275]    [Pg.275]    [Pg.275]   
See also in sourсe #XX -- [ Pg.170 ]




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Anti-SRC

Burning Star SRC

C-Src proto-oncogene

Elemental analyses of SRC

Halistanol sulfate pp60v-src protein tyrosine kinase

Hydrotreating of SRC

LC-fining of SRC

Light-phase SRC

PAMCO SRC

Pp60v-src protein tyrosine kinase

SRC SH2 domain

SRC comparison

SRC conversion for

SRC model

SRC solvent

SRC-1 coactivator

Solvent refined coal (SRC

Src SH3 domain

Src family

Src family kinases

Src family protein tyrosine kinases

Src family, of protein tyrosine kinases

Src gene

Src homology 3 domain

Src homology region

Src inhibitor

Src kinases

Src oncogene

Src protein

Src tyrosine kinase

Src, definition

Src-homology

Steroid receptor coactivator 1 (SRC

Tacoma 850°F+ SRC

UOP-filtered SRC

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