据11月13日Hydrocarbon Engineering报道，美国能源信息署（EIA）最近在其月度能源评估中改进了烃类气体液体（HGLs）的多个数据系列。更新的数据系列反映了EIA对液化石油气定义的变化，以更好地符合行业惯例。

EIA的月度能源审查现在包括较长的历史时间序列、按部门划分的丙烷消耗季节性特征、HGL组分热转换因子、非燃烧使用估算以及更新的二氧化碳(CO2)排放估算。

2018年，HGL约占美国石油总消费量的15%，2018年达到创纪录的300万桶/天，较2008年增长47%。

HGL包括九种石油产品：烷烃（乙烷、丙烷、正丁烷、异丁烷和天然汽油[以前称为戊烷+]）和烯烃（乙烯、丙烯、丁烯和异丁烯）。每一种产品的月度和年度消费数据都已公布，而丙烯和丙烯的历史数据可以追溯到1949年。乙烷/乙烯、丁烷/丁烯和异丁烷/异丁烯的综合消费数据始于1967年，天然汽油消费数据始于1973年。

丙烷是美国最常用的HGL产品之一。美国住宅和商业部门在冬季使用更多较多，主要用于供暖。工业部门（特别是化学工业）在夏季使用较多，因为这时丙烷价格相对较低。运输行业消费丙烷较少。丙烷是所有四个领域中唯一常用的HGL产品，其他HGL产品被认为是专门用于工业部门的。

EIA更新了每种HGL产品的热转换系数，单位为百万英热/桶。更新后，2018年HGL总热含量消耗降低了4%，天然气液化生产降低了2%。

EIA更新的热转换系数也导致2018年HGL产品的二氧化碳排放总量减少了1%。由于大部分HGL的消耗是用于非燃烧(非燃料)使用，因此美国HGLs产品的二氧化碳总排放量减少不到1%。例如，HGL产品通常用于制造塑料、油漆和树脂；乙烷用于防冻和清洁剂；丁烷用于合成橡胶；天然汽油常作溶剂。通过这些方式，HGLs被消耗而不是燃烧，因此在消耗过程中产生的排放更少。

邹勤 摘译自 Hydrocarbon Engineering

原文如下：

EIA improves propane and other hydrocarbon gas liquids data

The US Energy Information Administration (EIA) recently improved multiple data series for hydrocarbon gas liquids (HGLs) in its Monthly Energy Review. The updated data series reflect changes in how EIA defines liquefied petroleum gases to better align with industry practice.

HGLs accounted for about 15% of total US petroleum consumption in 2018, reaching a record-high 3 million bpd in 2018, a 47% increase from 2008. EIA’s Monthly Energy Review now includes longer historical time series, propane consumption seasonality by sector, HGL component thermal conversion factors, non-combustion use estimates, and updated carbon dioxide (CO2) emissions estimates.

HGLs include nine petroleum products: alkanes (ethane, propane, normal butane, isobutane, and natural gasoline [formerly known as pentanes plus]) and olefins (ethylene, propylene, butylene, and isobutylene). Monthly and annual consumption data for each product are now available starting in 2010, except propane-only and propylene-only, which extend back to 1949. Combined consumption data for ethane/ethylene, butane/butylene, and isobutane/isobutylene begin in 1967, and natural gasoline consumption data begin in 1973.

Propane is one of the most commonly consumed HGL products in the US. The US residential and commercial sectors use more propane, mostly for space heating, in the winter. The industrial sector (especially the chemical industry) uses more propane in the summer, when propane prices are relatively lower. Only small amounts of propane are used for transportation. Propane is the only HGL product that is commonly used in all four end-use sectors; the other HGL products are assumed to be exclusively used in the industrial sector.

EIA updated thermal conversion factors for each HGL product in million Btu/bbl. The updates lowered the heat content of aggregate HGL consumption in 2018 by 4% and natural gas plant liquids production by 2%.

EIA’s updated thermal conversion factors also resulted in a decrease in the calculated amount of CO2 emissions from total HGL products by 1% for 2018. The decrease to overall US CO2 emissions from all energy sources is less than 1% because most HGL consumption is for non-combustion (nonfuel) use. For example, HGL products are commonly used for making plastics, paints, and resins; ethane for anti-freeze and detergents; butanes for synthetic rubber; and natural gasoline for solvents. In this way, the HGLs are consumed but not combusted, so fewer emissions are generated in their consumption.