Petroleum, in addition to its use for energy, is the source of fuels, raw materials, and chemicals. Petroleum serves as the primary ingredient of the Nation's polymer industry which is projected to steadily increase in the future. In terms of tonnage and dollars, any potential replacements would be extremely valuable as petroleum is a limited resource and our dependency has major geo-political ramifications. In 1987, about $6.5 billion of petrochemicals were imported into the United States, nearly double the level in 1981 of $3.3 million. Petrochemicals are used to produce other chemical products, such as plastics, synthetic fibers, surface-active agents, plasticizers, solvents, nitrogenous fertilizers, and carbon black.
Since 1974, agricultural scientists have been screening the plant kingdom for sources of high-energy, easily extractable components suitable for fuel, chemicals, and petroleum-sparing chemical feedstock (raw materials used in chemical manufacturing). Nearly 900 species have been evaluated, of which 90 are promising enough to be studied in greater detail. More than 30 species consist of at least 20% polyphenols, and over a dozen yield more than 2% isoprene polymers, both of which are high in potentially useful energy in the form of easily extractable organic compounds. The chemical content of these plants can be separated into three classes of compounds with potential for industrial use (oils, polyphenols, and hydrocarbons). All these crude products contain, in addition to polyphenols, a wide variety of lipids (fats and related substances) and other substances. Polyphenols have good potential as fuels.
There is a national need to address the issues of substituting renewable resources derived from plants for non-renewable petroleum based chemicals, polymers, fuel, energy sources, and natural rubber. Current legislation provides the necessary authorizations for funding and outlines Congressional as well as public concern to address the issues relative to the industrial base and foreign dependency on strategic and essential industrial materials. Industrial crops provide materials of industrial importance and are sources of products utilized by industry in the manufacture of strategic and essential industrial materials. These materials are essential in a world dependent on non-renewable resources, especially petroleum.
Products such as natural rubber, lubricants, plastics, polymers, oil, fibers, resins, and acids, are all various forms of the carbon hydrogen chain finding their origin in plant life. Hydro-carbon producing plants can and are being developed as future oil and chemical resources. The domestic production of agriculturally produced industrial raw materials provides a viable alternative to the Nation's import dependence for petroleum based chemicals, natural rubber, and other industrial raw materials.
The potential for Agriculture's role to help support the Nation's industrial base can be measured in billions of dollars and millions of hectares of production. National policy for the development and commercialization of industrial crops is provided through the Critical Agricultural Materials Act of 1984, PL 98-284 that created the Critical Agricultural Materials Office in the U.S. Department of Agriculture.
Dependency is only one part of this concern. Certain resources are limited in terms of known supplies and in some instances these supplies are located primarily in unstable and even unfriendly foreign nations. Petroleum, currently in oversupply, will begin to diminish by the turn of the century. Because of the need to address these issues the United States government is following a policy to decrease the Nation's vulnerability by taking positive action that will promote our national security, help insure a healthy and vigorous economy, create American jobs, and protect America's natural resources and environment.
The U.S. is very dependent on imported petroleum (Table 1). Only about one fifth of our oil was imported in 1965. In the late 1970's, our imports had grown to over 40%. We reduced our dependency to 29% in 1983, but the U.S. Department of Energy predicts this will again grow to 50% in 1995 and some 56% by the year 2000.
This definition however is not adequate for understanding materials issues if agriculture is to play a role in helping the Nation by providing raw materials in support of the industrial base.
Critical materials now being extensively used in an agricultural context have been defined in legislation, the Critical Materials Act of 1984, PL 98-284, and the Strategic and Critical Materials Stockpiling Act of 1979, PL 96-41. A new working definition supports the notion that agriculturally produced hydro-carbons and other plant materials can significantly contribute to the Nation's industrial base (U.S. Department of Agriculture 1984).
The following definitions form the basis of the premises that currently underlie the rationale for critical materials policy for research and development of materials based upon agricultural technology. It is not intended nor implied that minerals and metals are included however; new polymers, plastics, composites, and fibers have implications for materials that can readily substitute for products that currently rely on metals.
Critical materials are materials of strategic and industrial importance, for which the Nation is now dependent, or has a high degree of dependency, upon foreign sources [PL 98-284].
Strategic materials are materials that would be needed to supply the military, industrial, and essential civilian needs of the United States during a national emergency and are not found or produced in the United States in sufficient quantities to meet such need [PL 96-41].
Industrial materials are basic raw materials that would be essential to United States industry both in emergency and in sustained production and which could be dependent upon foreign sources [Task Force Report: Growing Industrial Materials].
Within the context of these definitions and reduced petroleum supplies lies the rationale for an agricultural role in providing raw materials for the production of hydrocarbon based products for industry and defense. These raw materials are essentially based on the carbon-hydrogen chain and include a number of short, medium, and long chain fatty acids. The chemical derivatives of these fatty acid compounds are utilized by industry for a vast array of materials.
Two significant Task Force studies, Growing Industrial Materials: Renewable Resources From Agriculture and Forestry, (United States Department of Agriculture, 1984) and Development of New Crops: Needs, Procedures, Strategies, and Options, (Council of Agricultural Science and Technology 1984) addressed the issues of materials and the role Agriculture can play in this important National concern. In addition, a New Farm and Forest Products Task Force Report expressed this concept indicating that "significant opportunities exist for new farm and forest products to meet real market needs-particularly in industrial, non-food applications (U.S. Department of Agriculture, Office of Critical Materials 1987).
Hydrocarbon-producing plants can be developed as future oil and chemical resources. Such domestic production of industrial raw materials from forest and agricultural crops provides a viable alternative to the import dependency of the United States for petroleum based chemicals, natural rubber, and other essential materials needed by industry.
The need to develop industrial materials from crops and the forest is quite evident simply because of the increasing reliance in the modern world upon exhaustible resources, such as natural gas, petroleum, and coal for energy and chemical raw materials. Agriculturally derived raw materials can be quite competitive for several petroleum based products. In the future, we will have to depend even more upon renewable resources, regardless of desirable prices, because of depletion or temporary nonavailability of traditional derived raw materials.
The annual need for plastics production and industrial chemicals from petroleum (Table 2) is about 230 kg per person. The total petroleum demand exceeds 3860 kg per person, with the difference being used for power and fuels. In addition to the import of petroleum for energy and chemicals, many foreign agricultural products are also needed by industry.
In the U.S., research into new crops has shown that it is technologically feasible to produce a number of products for industrial use and it is only a matter of time before economic feasibility will be realized. Traditionally, materials issues have centered on minerals, metals, and petroleum. Little focus has been placed on the role agriculture can play in providing substitutes or replacements for many of the traditional materials even though this role has been outlined and defined in legislation (American Association for the Advancement of Science 1976a, b; Congressional Research Service 1977; National Academy of Science 1976; United States Senate 1979).
The above three legislative Acts, all concerned with materials, failed to encompass agriculture as a provider of materials in an industrial sense. Those who have addressed materials issues have not been agriculturally educated nor have there been individuals to champion the potential substitution of agricultural products for industrial materials. Additionally, the economics was not as important then as it is today nor were the concerns as great about future supplies.
This situation has changed as demonstrated by the passage of two important pieces of legislation which have set the stage and specifically defined a role for agriculture in providing materials for the Nation's industries.
Congress recognized that the development of a domestic industry or industries for the production and manufacture from native agricultural crops or products other than rubber which are of strategic and industrial importance but for which the Nation is now dependent upon foreign sources, would benefit the economy, the defense, and the general well-being of the Nation. They recognized that additional research efforts in this area should be undertaken or continued and expanded.
Congress also outlined a national policy and a new role for agriculture to produce critical industrial materials to benefit the Nation and promote economic development. The issue of natural rubber development under the Critical Agricultural Materials Act and in the U.S. Department of Agriculture is a story worth noting.
There is also a recognition that the Native Latex legislation initiated one of the first societies associated with "new crop" development. The Guayule Rubber Society was formed in 1979 to promote the research and development of natural rubber from guayule. This year, 1988, the Society responded to the emerging interest in "new crops" and voted to change its name to the Association For The Advancement of Industrial Crops.
It would be misleading to believe that the new crops are new and more accurate to recognize that current interest is a rebirth of a long history of research by governments, universities, and the private sector. It is time to recognize that Agriculture has a role larger than is traditionally recognized as being a provider mainly of food and fiber for human consumption. It is time to recognize a dual role for Agriculture-providing both industrial raw materials and food for the Nation.
Funding levels have always been a limiting factor but it has failed to dampen the vigor with which a growing number of individuals and entities, both public and private have held to the belief that natural rubber could, someday, be commercialized in the United States. Certain members of Congress have always supported the basic concepts outlined in the legislation. Perhaps the greatest roadblock to commercialization lies in the fact that the co-products have not been adequately exploited until recently. The price of natural rubber has fluctuated and in recent years, been inadequate to justify growing a crop where production cost was nearly double the cost of imported hevea rubber. It is now clear that with the co-products, resin and bagasse, the true costs are more equal to the price of imported natural rubber. With enhancement, the value-added factors of resin and bagasse, should make it possible to commercialize rubber within the next three to five years.
Since 1979, funding for research and development has been:
|Department of Agriculture||13.2|
|Department of Defense||13.1|
|Other Federal Agencies||2.9|
|The Firestone Tire & Rubber Co.||2.7|
|Department of Defense||15.0|
|Department of Agriculture||4.3|
The Firestone Tire & Rubber Company has researched and developed a solvent extraction process in use at the prototype facility in Arizona. Some 290 ha of guayule shrub exists in the four states of Arizona, California, New Mexico, and Texas as well as on the tribal lands of the Gila River Indian Community.
The Department of Agriculture has provided support and coordination to this effort through the office of Critical Agricultural Materials Office; directed University and USDA research programs; and supported a number of private sector efforts over the past ten years.
When can such an enterprise succeed? What will make it succeed? Is foreign dependency a reason to drive this success? Are strategic concerns imperative? Is economic feasibility necessary?
All of the above questions (and many others) are relevant in measuring the success of this program as outlines in the Congressional mandate to commercialize natural rubber in the United States. Without the concerns for a strong industrial base and dependency on foreign sources for strategic and essential industrial materials, the only driving force is economic feasibility.
The possibility of rubber supply interruption is the strongest argument for commercial success in the absence of economic feasibility. This alone is a reason to support a new struggling industry by guaranteeing a price support during the formative years. The possibility of competing with imported hevea rubber prices has to be the measure of current success in the free market and that is closer now (1988) than at any time in the history of guayule as a domestic source of natural rubber. Should adequate funding be made available through Congressional appropriations as well as the private sector, commercialization could proceed successfully within the next few years.
Has the program been successful? Yes and no, depending on the perspective. It certainly has been from a scientific and technological point of view. Technology is no longer the problem. The argument of cost is relative in terms of national security and industrial strength. Cost is minimal when considering that the annual import cost is nearly $1 billion dollars, the value of job creation, economic development, and tax considerations. However, in terms of the domestic budget deficit, it is a costly and politically difficult proposition to fund a new industry start up or provide a commodity price support to supply a portion of Defense end product needs. The ability to judge success must he in these arguments and will probably be evident in next three to five years.
Currently, we are moving closer to commercial production of natural rubber in the United States. An arid land plant that produces this commodity can be successfully grown. Natural rubber has been extracted at a pilot facility in Texas and a quantity of rubber delivered to the Army Tank Command at Warren, Michigan for testing on the M-1 tank. A dollar value has been established on two of the most abundant co-productsresin and bagasse. The price of domestically produced natural rubber is within close range of imported hevea rubber.
|Year||Supply||Demand||To balance||% of Total|
Source: USDA Office of Energy
|Class of chemicals||Consumption |
billions of pounds
|Polymers (adhesives, thickeners, flocculating agents, coatings)||40|
|Total chemicals from petroleum||100|