Regulatory Impact Analysis

The U.S. Environmental Protection Agency produces a large volume of reading matter, much of which is useful to anyone interested in the technology of desulfurization. For example, if you visit the page for Clean Air Nonroad Diesel - Tier 4 Final Rule, you will find links to the Regulatory Impact Analysis, as well as to individual chapters within that document.

Chapter 5: Fuel and Standard Feasibility, for example, describes and compares a number of desulfurization technologies offered by IFP, UOP, Akzo Nobel, Haldor Topsøe, and others.

Regulatory Impact Analysis (PDF) (Full Document, 1,568 pp, 8.5MB, EPA420-R-04-007, May 2004)
Individual Chapters:
Executive Summary (PDF) (14 pp, 185K)
Chapter 1: Industry Characterization (PDF) (42 pp, 513K)
Chapter 2: Air Quality, Health, and Welfare Effects (PDF) (155 pp, 1MB)
Chapter 3: Emission Inventory (PDF) (105 pp, 450K)
Chapter 4: Technologies and Test Procedures for Low-emission Engines (PDF) (184 pp, 1.3MB)
Chapter 5: Fuel and Standard Feasibility (PDF) (112 pp, 463K)
Chapter 6: Estimated Engine and Equipment Costs (PDF) (98 pp, 421K)
Chapter 7: Estimated Cost of Low-sulfur Fuels (PDF) (220 pp, 1.3MB)
Chapter 8: Estimated Aggregate Cost and Cost Per Ton of Reduced Emissions (PDF) (155 pp, 1MB)
Chapter 9: Cost-Benefit Analysis (PDF) (274 pp, 1.4MB)
Chapter 10: Economic Impact Analysis (PDF) (206 pp, 669K)
Chapter 11: Small Business Fexibility Analysis (PDF) (28 pp, 174K)
Chapter 12: Regulatory Alternatives (PDF) (22 pp, 161K)

source: http://www.epa.gov/nonroad-diesel/2004fr.htm