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  <xsd:element id="apd_NumberOfFacilitiesAcquired" name="NumberOfFacilitiesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="apd_OnsiteMember" name="OnsiteMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="apd_OtherIncomeExpenseNet" name="OtherIncomeExpenseNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="apd_PaceFloridaMember" name="PaceFloridaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="apd_PasadenaTexasMemberMember" name="PasadenaTexasMemberMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="apd_PercentSalesSupplyMode" name="PercentSalesSupplyMode" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="apd_PiedmontSouthCarolinaMember" name="PiedmontSouthCarolinaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="apd_ProductionFacilityMember" name="ProductionFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="apd_ReclassificationAdjustmentsAbstract" name="ReclassificationAdjustmentsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="apd_RestructuringAndRelatedCostTotalNumberOfPositionsEliminatedOrExpectedToBeEliminated" name="RestructuringAndRelatedCostTotalNumberOfPositionsEliminatedOrExpectedToBeEliminated" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration" />
  <xsd:element id="apd_RestructuringReserveReflectedInPensionLiability" name="RestructuringReserveReflectedInPensionLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="apd_SaleofEquipmentMember" name="SaleofEquipmentMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="apd_SalesCostOfSales" name="SalesCostOfSales" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="apd_SalesTypeAndDirectFinancingLeasesLeaseReceivableMaturityTableTableTextBlock" name="SalesTypeAndDirectFinancingLeasesLeaseReceivableMaturityTableTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="apd_SalesTypeAndDirectFinancingLeasesLeaseReceivableReductionDueToPaymentsReceivedDuringPeriod" name="SalesTypeAndDirectFinancingLeasesLeaseReceivableReductionDueToPaymentsReceivedDuringPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="apd_ScheduleOfRelatedPartyLiabilitiesResultingFromAcquisitionsTableTextBlock" name="ScheduleOfRelatedPartyLiabilitiesResultingFromAcquisitionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="apd_ScheduleOfRightOfUseAssetsandLeaseLiabilitiesLesseeTableTextBlock" name="ScheduleOfRightOfUseAssetsandLeaseLiabilitiesLesseeTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="apd_ScheduleOfShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsValuationAssumptionsTableTextBlock" name="ScheduleOfShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsValuationAssumptionsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType" xbrli:periodType="duration" />
  <xsd:element id="apd_SitesOnWhichFinalSettlementHasNotBeenReached" name="SitesOnWhichFinalSettlementHasNotBeenReached" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element id="apd_TaxCutsAndJobsActOf2017TaxReformRepatriation" name="TaxCutsAndJobsActOf2017TaxReformRepatriation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element id="apd_TaxCutsAndJobsActOf2017TransitionTaxForAccumulatedForeignEarningsNonrecurringExpenseBenefitForUSTaxOnForeignDividends" name="TaxCutsAndJobsActOf2017TransitionTaxForAccumulatedForeignEarningsNonrecurringExpenseBenefitForUSTaxOnForeignDividends" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="apd_TimeBasedDeferredStockUnitMember" name="TimeBasedDeferredStockUnitMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="apd_U.S.SupplementaryPensionPlanMember" name="U.S.SupplementaryPensionPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
