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Appendix E: Criteria for Evaluating Technologies
Pages 54-55

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From page 54... ... . The following factors were considered: � minimal addition of processing materials that would require treatment, disposal, regeneration, recycling, or other handling � minimal number of processing steps, which all have an incremental environmental burden in potential leaks and energy, maintenance, shutdown and start-up, and clean-out requirements � minimal toxicity of emissions, wastes, or other material that require treatment, disposal, regeneration, recycling, or other handling2 � operating temperatures and pressures as close to ambi� minimal corrosion, plugging, sensitive process-control parameters, and other operating difficulties � minimal high-temperature vapor streams that require high-quality treatment Processing materials include not only the obvious purchased solvents, acids, bases, etc., and service materials, such as catalysts, filters, and absorbents, but also common items, such as water, nitrogen for instruments and vapor-space inerting, and nitrogen in air used as a source of oxygen. Read the entire page →
From page 55... ... Cost Although the committee did not conduct a cost analysis for each technology, cost was estimated based on past experience and knowledge. The following cost factors were considered: � total costs, including capital and operating costs � costs per unit of feed 55 Practical Operability The following factors related to practicality were considered: � minimal training for operators (average skill levels for the chemical industry) Read the entire page →

From page 54...

... . The following factors were considered: � minimal addition of processing materials that would require treatment, disposal, regeneration, recycling, or other handling � minimal number of processing steps, which all have an incremental environmental burden in potential leaks and energy, maintenance, shutdown and start-up, and clean-out requirements � minimal toxicity of emissions, wastes, or other material that require treatment, disposal, regeneration, recycling, or other handling2 � operating temperatures and pressures as close to ambi� minimal corrosion, plugging, sensitive process-control parameters, and other operating difficulties � minimal high-temperature vapor streams that require high-quality treatment Processing materials include not only the obvious purchased solvents, acids, bases, etc., and service materials, such as catalysts, filters, and absorbents, but also common items, such as water, nitrogen for instruments and vapor-space inerting, and nitrogen in air used as a source of oxygen.

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From page 55...

... Cost Although the committee did not conduct a cost analysis for each technology, cost was estimated based on past experience and knowledge. The following cost factors were considered: � total costs, including capital and operating costs � costs per unit of feed 55 Practical Operability The following factors related to practicality were considered: � minimal training for operators (average skill levels for the chemical industry)

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Appendix E: Criteria for Evaluating Technologies Pages 54-55

Appendix E: Criteria for Evaluating Technologies
Pages 54-55