定价： 590元 / 折扣价： 502 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

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定价： 646元 / 折扣价： 550 元 加购物车

定价： 918元 / 折扣价： 781 元 加购物车

定价： 843元 / 折扣价： 717 元 加购物车

4.1 In 2014, the U.S. EPA published the final rules adding renewable fuel pathways under the RFS Program. The rules qualified kernel fiber as a cellulosic feedstock meeting the 60 % greenhouse gas (GHG) reduction and qualifies for the generation of D3 RINs. These rules allow for two approaches for kernel fiber conversion (CFR 40, Part 80 and EPA-HQ-OAR-2012-0401; FRL-9910-40-OAR):4.1.1 Producers of cellulosic fuels derived from conversion of feedstocks that are predominantly cellulosic, where “predominantly cellulosic” is defined as feedstock that has an average adjusted cellulosic content of 75 %, measured on a dry mass basis; furthermore, this ‘‘adjusted cellulosic content’’ is the percent of organic (non-ash) material that is cellulose, hemicellulose, or lignin (CFR 40, Part 80 and EPA-HQ-OAR-2012-0401; FRL-9910-40-OAR).4.1.2 Producers of cellulosic fuels derived from the simultaneous conversion of feedstocks that are predominantly cellulosic and feedstocks that are not predominantly cellulosic (CFR 40, Part 80 and EPA-HQ-OAR-2012-0401; FRL-9910-40-OAR).4.2 Producers that wish to gain approval to the pathway that claims simultaneous conversion of feedstocks that are predominantly cellulosic and feedstocks that are not predominantly cellulosic are required to quantify the amount of renewable fuel that is derived specifically from cellulosic content and from starch. To accomplish this, the producer needs to quantify the amount of cellulosic content and starch present before the conversion process begins and after the conversion process is complete. These measurements of cellulosic content and starch content before and after conversion are used to calculate a converted fraction of each, which is then used to ratio the renewable fuel produced accordingly and assign those respective gallons the D6 or D3 RIN code (CFR 40, Part 80 and EPA-HQ-OAR-2012-0401; FRL-9910-40-OAR).1.1 This practice provides criteria for the sampling, testing, and calculation methodologies used for the quantification of the converted fraction of starch and cellulosic content. Furthermore, this practice covers procedures for the management of the standard error associated with the sampling and testing of before conversion and after conversion samples from a fuel ethanol production facility.1.1.1 This practice can be used to determine the volume of renewable fuel produced from the simultaneous conversion of starch and cellulosic material eligible for generating D3 RINs under the United States (U.S.) Renewable Fuel Standard (RFS).1.2 This practice covers the collection and testing of heterogeneous material, including, but not limited to: corn, sorghum, wheat, mash, beer, whole stillage, dried distillers grains with solubles (DDGS), and dried distillers grains.1.3 This practice is intended to be used in renewable fuel production facilities designed to produce renewable alcohols. Use of this practice in any other type of process has not been reviewed.1.4 This practice can be utilized using either manual or automatic sampling techniques, so long as the criteria of this practice are followed.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

定价： 918元 / 折扣价： 781 元 加购物车

定价： 646元 / 折扣价： 550 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车

This specification covers dimethyl ether (DME) for use as a fuel in engines specifically designed or modified for DME and for blending with liquefied petroleum gas. It is intended for use by DME manufacturers, purpose-built engine developers, in contracts for the purchase of DME for fuel purposes, and for the guidance of consumers of this type of fuel. This specification includes chemical composition and other requirements, sampling, and test methods.1.1 This specification covers dimethyl ether (DME) for use as a fuel in engines specifically designed or modified for DME and for blending with liquefied petroleum gas (LPG). This specification is for use by manufacturers of dimethyl ether, by engine developers of purpose-built engines, in contracts for the purchase of DME for fuel purposes, and for the guidance of consumers of this type of fuel.NOTE 1: The generation and dissipation of static electricity can create problems in the handling of DME. For more information on the subject, see Guide D4865.1.2 The values stated in SI units are to be regarded as standard. Units in parentheses are for information only.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

The physical and mechanical properties of cladding materials can be altered by exposure to a high-energy neutron flux. The magnitude and relationship of these changes are functions of the material and its metallurgical condition; the amount, rate, and energy spectrum of the radiation; the exposure temperature; the test temperature; the purity, velocity, volume, and purification system of the coolant; and effects of contained fuel.1.1 This practice covers the procedures for postirradiation examination of cladding, determination of breached nuclear fuel elements, selection of material and tests for radiation studies, determination of radiation conditions, conduction of tests for mechanical properties of cladding, and the reporting of data.1.2 The purpose of this practice is to provide detailed guidelines for the postirradiation examination of fuel element cladding and to achieve better correlation and interpretation of the data in the field of radiation effects.1.3 This practice may be applied to metallic cladding from all types of fuel elements. The tests described in this practice for determining mechanical properties of the fuel element cladding practice should be included in the preirradiation characterization of the cladding and for planning irradiation effects tests for evaluation of materials for cladding and other components in nuclear reactors.Note 1—The values stated in SI units as described in Standard E 380 are to be regarded as the standard.

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定价： 0元 / 折扣价： 0 元 加购物车

定价： 646元 / 折扣价： 550 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车